How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 20
items per page: 25 50 75
Sort by:

Studies on the microstructure of epoxy-cement composites

P. Łukowski
Archives of Civil Engineering | 2016 | No 2 | 101-113
Keywords cement epoxy polymer composite beams modification microstructure
Download PDF Download RIS Download Bibtex

Abstract

Introduction of polymers into the cement composites improves same of the properties of concretes and mortars. Therefore, the polymer-cement composites are successfully used in construction. The model of microstructure formation in cement composites modified with thermoplastic polymer (pre-mix modifiers) has already been developed and successfully implemented. However, the formation of microstructure in the case of epoxy-cement composites (containing post-mix modifier) demonstrates same peculiarities which should be taken into account when modelling the process. The microstructure of epoxy-cement composites and its formation is discussed in the paper. The model is offered, formulated on the basis of the microscopic observations and results of testing.

Go to article

Authors and Affiliations

P. Łukowski

A study of thermal diffusivity of carbon-epoxy and glass-epoxy composites using the modified pulse method

Janusz Terpiłowski Joanna Piotrowska-Woroniak Julita Romanowska
Archives of Thermodynamics | 2014 | No 3 September | 117-128 | DOI: 10.2478/aoter-2014-0024
Keywords thermal diffusivity pulse method flash method thermophysical properties carbon-epoxy composite glass-epoxy composite epoxy resin
Download PDF Download RIS Download Bibtex

Abstract

Transient heat transfer is studied and compared in two plane-parallel composite walls and one EPIDIAN 53 epoxy resin wall acting as a matrix for both composites. The first of the two walls is made of carbon-epoxy composite; the other wall is made of glass-epoxy composite, both with comparable thickness of about 1 mm and the same number of carbon and glass fabric layers (four layers). The study was conducted for temperatures in the range of 20-120 °C. The results of the study of thermal diffusivity which characterizes the material as a heat conductor under transient conditions have a preliminary character. Three series of tests were conducted for each wall. Each series took about 24 h. The results from the three series were approximated using linear functions and were found between (0.7-1.35) x 10-7m2/s. In the whole range of temperature variation, the thermal diffusivity values for carbon-epoxy composite are from 1.2 to 1.5 times higher than those for the other two materials with nearly the same thermal diffusivity characteristics.
Go to article

Authors and Affiliations

Janusz Terpiłowski
Joanna Piotrowska-Woroniak
Julita Romanowska

Swarm intelligence integrated approach for experimental investigation in milling of multiwall carbon nanotube/polymer nanocomposites

Prakhar Kumar Kharwar Rajesh Kumar Verma Nirmal Kumar Mandal Arpan Kumar Mondal
Archive of Mechanical Engineering | 2020 | vol. 67 | No 3 | 353-376 | DOI: 10.24425/ame.2020.131698
Keywords nanocomposites epoxy particle swarm Pareto front
Download PDF Download RIS Download Bibtex

Abstract

In manufacturing industries, the selection of machine parameters is a very complicated task in a time-bound manner. The process parameters play a primary role in confirming the quality, low cost of manufacturing, high productivity, and provide the source for sustainable machining. This paper explores the milling behavior of MWCNT/epoxy nanocomposites to attain the parametric conditions having lower surface roughness (Ra) and higher materials removal rate (MRR). Milling is considered as an indispensable process employed to acquire highly accurate and precise slots. Particle swarm optimization (PSO) is very trendy among the nature-stimulated metaheuristic method used for the optimization of varying constraints. This article uses the non-dominated PSO algorithm to optimize the milling parameters, namely, MWCNT weight% (Wt.), spindle speed (N), feed rate (F), and depth of cut (D). The first setting confirmatory test demonstrates the value of Ra and MRR that are found as 1:62 μm and 5.69 mm3/min, respectively and for the second set, the obtained values of Ra and MRR are 3.74 μm and 22.83 mm3/min respectively. The Pareto set allows the manufacturer to determine the optimal setting depending on their application need. The outcomes of the proposed algorithm offer new criteria to control the milling parameters for high efficiency.

Go to article

Bibliography

[1] M. Liu, H. Younes, H. Hong, and G.P. Peterson. Polymer nanocomposites with improved mechanical and thermal properties by magnetically aligned carbon nanotubes. Polymer, 166:81–87, 2019. doi: 10.1016/j.polymer.2019.01.031.
[2] S.K. Singh and V.K. Verma. Exact solution of flow in a composite porous channel. Archive of Mechanical Engineering, 67(1):97–110, 2020, doi: 10.24425/ame.2020.131685.
[3] N. Pundhir, S. Zafar, and H. Pathak. Performance evaluation of HDPE/MWCNT and HDPE/kenaf composites. Journal of Thermoplastic Composite Materials, 2019. doi: 10.1177/0892705719868278.
[4] N. Muralidhar, V. Kaliveeran, V. Arumugam, and I.S. Reddy. Dynamic mechanical characterization of epoxy composite reinforced with areca nut husk fiber. Archive of Mechanical Engineering, 67(1):57–72, 2020, doi: 10.24425/ame.2020.131683.
[5] F. Mostaani, M.R. Moghbeli, and H. Karimian. Electrical conductivity, aging behavior, and electromagnetic interference (EMI) shielding properties of polyaniline/MWCNT nanocomposites. Journal of Thermoplastic Composite Materials, 31(10):1393–1415, 2018. doi: 10.1177/0892705717738294.
[6] M.R. Sanjay, P. Madhu, M. Jawaid, P. Senthamaraikannan, S. Senthil, and S. Pradeep. Characterization and properties of natural fiber polymer composites: A comprehensive review. Journal of Cleaner Production, 172:566–581, 2018. doi: 10.1016/j.jclepro.2017.10.101.
[7] A.J. Valdani and A. Adamian. Finite element-finite volume simulation of underwater explosion and its impact on a reinforced steel plate. Archive of Mechanical Engineering, 67(1):5–30, 2020, doi: 10.24425/ame.2020.131681.
[8] A. Kausar, I. Rafique, and B. Muhammad. Review of applications of polymer/carbon nanotubes and epoxy/CNT composites. Polymer-Plastics Technology and Engineering, 55(11):1167–1191, 2016. doi: 10.1080/03602559.2016.1163588.
[9] E. Vajaiac, et al. Mechanical properties of multiwall carbon nanotube-epoxy composites. Digest Journal of Nanomaterials and Biostructures, 10(2):359–369, 2015.
[10] A.E Douba, M. Emiroglu, R.A Tarefder, U.F Kandil, and M.R. Taha. Use of carbon nanotubes to improve fracture toughness of polymer concrete. Journal of the Transportation Research Board, 2612(1):96–103, 2017. doi: 10.3141/2612-11.
[11] W. Khan, R. Sharma, and P. Saini. Carbon nanotube-based polymer composites: synthesis, properties and applications. In M.R. Berber and I.H. Hafez (eds.). Carbon Nanotubes. Current Progress and their Polymer Composites. chapter 1, pages 1-46. IntechOpen, Rijeka, Croatia, 2016. doi: 10.5772/62497.
[12] W.M. da Silva, H. Ribeiro, J.C. Neves, A.R. Sousa, and G.G. Silva. Improved impact strength of epoxy by the addition of functionalized multiwalled carbon nanotubes and reactive diluent. Journal of Applied Polymer Science, 132(39):1–12, 2015, doi: 10.1002/app.42587.
[13] S. Dixit, A. Mahata, D.R. Mahapatra, S.V. Kailas, and K. Chattopadhyay. Multi-layer graphene reinforced aluminum – Manufacturing of high strength composite by friction stir alloying. Composites Part B: Engineering,136: 63–71, 2018. doi: 10.1016/j.compositesb.2017.10.028.
[14] C. Kostagiannakopoulou, X. Tsilimigkra, G. Sotiriadis, and V. Kostopoulos. Synergy effect of carbon nano-fillers on the fracture toughness of structural composites. Composites Part B: Engineering, 129:18–25, 2017. doi: 10.1016/j.compositesb.2017.07.012.
[15] G. Romhány and G. Szebényi. Preparation of MWCNT reinforced epoxy nanocomposite and examination of its mechanical properties. Plastics, Rubber and Composites, 37(5-6):214–218, 2008. doi: 10.1179/174328908X309376.
[16] G. Mittal, V. Dhand, K.Y. Rhee, S.J. Park, and W.R. Lee. A review on carbon nanotubes and graphene as fillers in reinforced polymer nanocomposites. Journal of Industrial and Engineering Chemistry, 21:11–25, 2015. doi: 10.1016/j.jiec.2014.03.022.
[17] S. H. Behzad, M.J. Kimya, G. Mehrnaz. Mechanical properties of multi-walled carbon nanotube/epoxy polysulfide nanocomposite. Journal of Materials & Design, 50:62–67, 2013.
[18] N. Yu, Z.H. Zhang, and S.Y. He. Fracture toughness and fatigue life of MWCNT/epoxy composites. Materials Science and Engineering: A, 494(1-2):380:384, 2018. doi: 10.1016/j.msea.2008.04.051.
[19] J.G. Park, et al. Thermal conductivity of MWCNT/epoxy composites: The effects of length, alignment and functionalization. Carbon, 50(6):2083–2090, 2012. doi: 10.1016/j.carbon.2011.12.046.
[20] B. Singaravel and T. Selvaraj. Optimization of machining parameters in turning operation using combined TOPSIS and AHP method. Tehnički Vjesnik, 22 (6):1475–1480, 2015. doi: 10.17559/TV-20140530140610.
[21] N. Kaushik and S. Singhal. Hybrid combination of Taguchi-GRA-PCA for optimization of wear behavior in AA6063/SiC p matrix composite. Production & Manufacturing Research, 6(1):171–189, 2018. doi: 10.1080/21693277.2018.1479666.
[22] S.O.N. Raj and S. Prabhu. Analysis of multi objective optimisation using TOPSIS method in EDM process with CNT infused copper electrode. International Journal of Machining and Machinability of Materials, 19(1):76–94, 2017. doi: 10.1504/IJMMM.2017.081190.
[23] S. Chakraborty. Applications of the MOORA method for decision making in manufacturing environment. International Journal of Advanced Manufacturing Technology, 54(9-12):1155–1166, 2011. doi: 10.1007/s00170-010-2972-0.
[24] M.P. Jenarthanan and R. Jeyapaul. Optimisation of machining parameters on milling of GFRP composites by desirability function analysis using Taguchi method. International Journal of Engineering, Science and Technology, 5(4):23–36, 2013. doi: 10.4314/ijest.v5i4.3.
[25] T.V. Sibalija. Particle swarm optimisation in designing parameters of manufacturing processes: A review (2008–2018). Applied Soft Computing, 84:105743, ISSN 1568-4946, doi: 10.1016/j.asoc.2019.105743.
[26] J. Kennedy and R. Eberhart. Particle swarm optimization. In Proceedings of the ICNN'95 – International Conference on Neural Networks, pages 1942–1948, Perth, Australia, 27 Nov.–1 Dec. 1995. doi: 10.1109/ICNN.1995.488968.
[27] F. Cus and J. Balic. Optimization of cutting process by GA approach. Robotics and Computer-Integrated Manufacturing, 19(1-2):113–121, 2003. doi: 10.1016/S0736-5845(02)00068-6.
[28] M.N. Ab Wahab, S. Nefti-Meziani, and A. Atyabi. A comprehensive review of swarm optimization algorithms. PLoS One, 10(5): e0122827, 2015. doi: 10.1371/journal.pone.0122827.
[29] A. Del Prete, R. Franchi, and D. De Lorenzis. Optimization of turning process through the analytic flank wear modelling. AIP Conference Proceedings, 1960:070008, 2018.doi: 10.1063/1.5034904.
[30] G. Xu and Z. Yang. Multiobjective optimization of process parameters for plastic injection molding via soft computing and grey correlation analysis. International Journal of Advanced Manufacturing Technology, 78(1–4):525–536, 2015. doi: 10.1007/s00170-014-6643-4.
[31] H. Juan, S.F. Yu, and B.Y. Lee. The optimal cutting parameter selection of production cost in HSM for SKD61 tool steels. International Journal of Machine Tools and Manufacturing, 43 (7):679–686, 2003. doi: 10.1016/S0890-6955(03)00038-5.
[32] U. Zuperl and F. Cus. Optimization of cutting conditions during cutting by using neural networks. Robotics and Computer-Integrated Manufacturing, 19(1-2):189–199, 2003. doi: 10.1016/S0736-5845(02)00079-0.
[33] P.E. Amiolemhen and A.O.A. Ibhadode. Application of genetic algorithms – determination of the optimal machining parameters in the conversion of a cylindrical bar stock into a continuous finished profile. International Journal of Machine Tools and Manufacture, 44(12-13):1403–1412, 2004. doi: 10.1016/j.ijmachtools.2004.02.001.
[34] E.O. Ezugwu, D.A. Fadare, J. Bonney, R.B. Da Silva, and W.F. Sales. Modeling the correlation between cutting and process parameters in high-speed machining of Inconel 718 alloy using an artificial neural network. International Journal of Machine Tools and Manufacturing, 45(12-13):1375–1385, 2005. doi: 10.1016/j.ijmachtools.2005.02.004.
[35] P. Asokan, N. Baskar, K. Babu, G. Prabhakaran, and R. Saravanan. Optimization of surface grinding operation using particle swarm optimization technique. Journal of Manufacturing Science and Engineering, 127(4):885–892, 2015. doi: 10.1115/1.2037085.
[36] R.Q. Sardinas, M.R. Santana, and E.A. Brindis. Genetic algorithm-based multio-bjective optimization of cutting parameters in turning processes. Engineering Applications of Artificial Intelligence, 19(2):127–133, 2006. doi: 10.1016/j.engappai.2005.06.007.
[37] C. Jia and H. Zhu. An improved multiobjective particle swarm optimization based on culture algorithms. Algorithms, 10(2):46–56, 2017. doi: 10.3390/a10020046.
[38] C.A. Coello Coello, G.T. Pulido, and M.S. Lechuga. Handling multiple objectives with particle swarm optimization. IEEE Transactions on Evolutionary Computation, 8(3):256–279, 2004. doi: 10.1109/TEVC.2004.826067.
[39] C.R. Raquel and P.C. Naval. An effective use of crowding distance in multiobjective particle swarm optimization. In: Proceedings of the 7th Annual Conference on Genetic and Evolutionary Computation, pages 257–264, Washington DC, USA, 2005. doi: 10.1145/1068009.1068047.
[40] G.T. Pulido and C.A. Coello Coello. Using clustering techniques to improve the performance of a multi-objective particle swarm optimizer. In: Proceedings of the Genetic and Evolutionary Computation Conference (GECCO), pages 225-237, Seattle, USA, 2004. doi: 10.1007/978-3-540-24854-5_20.
[41] S. Mostaghim and J. Teich. Strategies for finding good local guides in multi-objective particle swarm optimization (MOPSO). In: Proceedings of the 2003 IEEE Swarm Intelligence Symposium (SIS'03), pages 26–33, Indianapolis, IN, USA, 26 April 2003. doi: 10.1109/SIS.2003.1202243.
[42] J. Branke and S. Mostaghim. About selecting the personal best in multi-objective particle swarm optimization. In Proceedings of the Parallel Problem Solving From Nature (PPSN Ix) International Conference, pages 523–532, Reykjavik, Iceland, 9–13 September 2006. doi: 10.1007/11844297_53.
[43] T.M. Chenthil Jegan and D. Ravindran. Electrochemical machining process parameter optimization using particle swarm optimization. Computational Intelligence, 33:1019–1037, 2017. doi: 10.1111/coin.12139.
[44] C.P. Mohanty, S.S. Mahapatra, and M.R. Singh. A particle swarm approach for multi-objective optimization of electrical discharge machining process. Journal of Intelligent Manufacturing, 27:1171–1190, 2016. doi: 10.1007/s10845-014-0942-3.
[45] U. Natarajan, V.M. Periasamy, and R. Saravanan. Application of particle swarm optimisation in artificial neural network for the prediction of tool life. The International Journal of Advanced Manufacturing Technology, 31:871–876, 2007. doi: 10.1007/s00170-005-0252-1.
[46] A.K. Gandhi, S.K. Kumar, M.K. Pandey, and M.K. Tiwari. EMPSO-based optimization for inter-temporal multi-product revenue management under salvage consideration. Applied Soft Computing, 11(1):468–476, 2011. doi: 10.1016/j.asoc.2009.12.006.
[47] J.J. Yang, J.Z. Zhou, W. Wu, and F. Liu. Application of improved particle swarm optimization in economic dispatching. Power System Technology, 29(2):1–4, 2005.
[48] T. Sibalija, S. Pentronic, and D. Milovanovic. Experimental optimization of nimonic 263 laser cutting using a particle swarm approach. Metals, 9:1147, 2019. doi: 10.3390/met9111147.
[49] X. Luan, H. Younse, H. Hong, G.P. Peterson. Improving mechanical properties of PVA based nano composite using aligned single-wall carbon nanotubes. Materials Research Express, 6 (10):1050a6, 2019. doi: 10.1088/2053-1591/ab4058.
[50] H. Younes, R.A. Al-Rub, M.M. Rahman, A. Dalaq, A.A. Ghaferi, and T. Shah. Processing and property investigation of high-density carbon nanostructured papers with superior conductive and mechanical properties. Diamond and Related Materials, 68:109–117, 2016. doi: 10.1016/j.diamond.2016.06.016.
[51] G. Christensen, H. Younes, H. Hong, and G.P. Peterson. Alignment of carbon nanotubes comprising magnetically sensitive metal oxides by nonionic chemical surfactants. Journal of Nanofluids, 2(1): 25–28, 2013. doi: 10.1166/jon.2013.1031.
[52] H. Younes, M.M. Rahman, A.A. Ghaferi, and I. Saadat. Effect of saline solution on the electrical response of single wall carbon nanotubes-epoxy nanocomposites. Journal of Nanomaterials, 2017: 6843403, 2017 doi: 10.1155/2017/6843403.
[53] H. Younes, G. Christensen, L. Groven, H. Hong, and P. Smith. Three dimensional (3D) percolation network structure: Key to form stable carbon nano grease. Journal of Applied Research and Technology, 14(6):375–382, 2016. doi: 10.1016/j.jart.2016.09.002.
[54] J. Jerald, P. Asokan, G. Prabaharan, and R. Saravanan. Scheduling optimization of flexible manufacturing systems using particle swarm optimization algorithm. The International Journal of Advanced Manufacturig Technology, 25:964–971, 2005. doi: 10.1007/s00170-003-1933-2.
[55] M. Ghasemi, E. Akbari, A. Rahimnejad, S.E. Razavi, S. Ghavidel, and L. Li. Phasor particle swarm optimization: a simple and efficient variant of PSO. Soft Computing, 23:9701–9718, 2019. doi: 10.1007/s00500-018-3536-8.
[56] M.R. Singh and S.S. Mahapatra. A swarm optimization approach for flexible flow shop scheduling with multiprocessor tasks. The International Journal of Advanced Manufacturing Technology, 62(1–4), 267–277, 2012. doi: 10.1007/s00170-011-3807-3.
[57] H. Yoshida, K. Kawata, Y. Fukuyama, S. Takayama, and Y. Nakanishi. A particle swarm optimization for reactive power and voltage control considering voltage security assessment. IEEE Transactions on Power Systems, 15(4):1232–1239, 2000. doi: 10.1109/59.898095.
[58] F. Belmecheri, C. Prins, F. Yalaoui, and L. Amodeo. Particle swarm optimization algorithm for a vehicle routing problem with heterogeneous fleet, mixed backhauls, and time windows. Journal of Intelligent Manufacturing, 24(4):775–789, 2013. doi: 10.1007/s10845-012-0627-8.
[59] M. Bachlaus, M.K. Pandey, C. Mahajan, R. Shankar, and M.K. Tiwari. Designing an integrated multi-echelon agile supply chain network: a hybrid taguchi-particle swarm optimization approach. Journal of Intelligent Manufacturing, 19(6):747–761, 2008. doi: 10.1007/s10845-008-0125-1.
[60] B. Brandstatter and U. Baumgartner. Particle swarm optimization – mass-spring system analogon. IEEE Transactions on Magnetics, 38(2):997–1000, 2002. doi: 10.1109/20.996256.
[61] B. Kim and S. Son. A probability matrix-based particle swarm optimization for the capacitated vehicle routing problem. Journal of Intelligent Manufacturing, 23(4):1119–1126, 2012. doi: 10.1007/s10845-010-0455-7.
[62] C.H. Wu, D.Z. Wang, A. Ip, D.W. Wang, C.Y. Chan, and H.F. Wan. A particle swarm optimization approach for components placement inspection on printed circuit boards. Journal of Intelligent Manufacturing, 20(5):535–549, 2009. doi: 10.1007/s10845-008-0140-2.
[63] S.B. Raja and N. Baskar. Application of particle swarm optimization technique for achieving desired milled surface roughness in minimum machining time. Expert Systems with Applications, 39(5):5982–5989, 2012. doi: 10.1016/j.eswa.2011.11.110.
[64] N. Yusup, A.M. Zain, and S.Z.M. Hashim. Overview of PSO for optimizing process parameters of machining. Procedia Engineering, 29:914–923, 2012. doi: 10.1016/j.proeng.2012.01.064.
[65] R.L. Malghan, K.M.C. Rao, A.K. Shettigar, S.S. Rao, and R.J. D'Souza. Application of particle swarm optimization and response surface methodology for machining parameters optimization of aluminium matrix composites in milling operation. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39(9):2541–3553, 2017. doi: 10.1007/s40430-016-0675-7.
[66] A. Hadidi, A. Kaveh, B. Farahmand Azar, S. Talatahari, and C. Farahmandpour. An efficient optimization algorithm based on particle swarm and simulated annealing for space trusses. International Journal of Optimization in Civil Engineering, 3:377–395, 2011.
[67] T. Chaudhary, A.N. Siddiquee, A.K. Chanda, and Z.A. Khan. On micromachining with a focus on miniature gears by non conventional processes: a status report. Archive of Mechanical Engineering, 65(1):129–169, 2018. doi: 10.24425/119413.
[68] D. Kumar and K.K Singh. An experimental investigation of surface roughness in the drilling of MWCNT doped carbon/epoxy polymeric composite material. IOP Conference Series: Materials Science and Engineering, 149:012096, 2016. doi: 10.1088/1757-899X/149/1/012096.
[69] Niharika, B.P. Agrawal, I.A. Khan, and Z.A. Khan. Effects of cutting parameters on quality of surface produced by machining of titanium alloy and their optimization. Archive of Mechanical Engineering, 63(4):531–548, 2016. doi: 10.1515/meceng-2016-0030.
[70] N.S. Kumar, A. Shetty, Ashay Shetty, K. Ananth, and H. Shetty. Effect of spindle speed and feed rate on surface roughness of carbon steels in CNC turning. Procedia Engineering, 38:691– 697, 2012. doi: 10.1016/j.proeng.2012.06.087.
[71] E.T. Akinlabi, I. Mathoho, M.P. Mubiayi, C. Mbohwa, and M.E. Makhatha. Effect of process parameters on surface roughness during dry and flood milling of Ti-6A-l4V. In: 2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT), pages 144–147, Cape Town, South Africa, 10-13 February 2018. doi: 10.1109/ICMIMT.2018.8340438.
[72] J.P. Davim, L.R. Silva, A. Festas, and A.M. Abrão. Machinability study on precision turning of PA66 polyamide with and without glass fiber reinforcing. Materials & Design, 30(2):228– 234, 2009. doi: 10.1016/j.matdes.2008.05.003.
[73] J. Cha, J. Kim, S. Ryu, and S.H. Hong. Comparison to mechanical properties of epoxy nanocomposites reinforced by functionalized carbon nanotubes and graphene nanoplatelets. Composites Part B: Engineering, 162:283–288, 2018. doi: 10.1016/j.compositesb.2018.11.011.
[74] R.V. Rao, P.J. Pawar, and R. Shankar. Multi-objective optimization of electrochemical machining process parameters using a particle swarm optimization algorithm. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 222(8):949–958, 2008. doi: 10.1243/09544054JEM1158.
[75] R. Farshbaf Zinati, M.R. Razfar, and H. Nazockdast. Surface integrity investigation for milling PA6/ MWCNT. Materials and Manufacturing Processes, 30(8):1035–1041, 2014. doi: 10.1080/10426914.2014.961473.
[76] I. Shyha, G.Y. Fu, D.H. Huo, B. Le, F. Inam, M.S. Saharudin, and J.C. Wei. Micro-machining of nano-polymer composites reinforced with graphene and nano-clay fillers. Key Engineering Materials, 786:197–205, 2018. doi: 10.4028/www.scientific.net/kem.786.197.
[77] G. Fu, D. Huo, I. Shyha, K. Pancholi, and M.S. Saharudin. Experimental investigation on micro milling of polyester/halloysite nano-clay nanocomposites. Nanomaterials, 9(7):917, 2019. doi: 10.3390/nano9070917.
Go to article

Authors and Affiliations

Prakhar Kumar Kharwar
1
Rajesh Kumar Verma
1
Nirmal Kumar Mandal
2
Arpan Kumar Mondal
2
  1. Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology Gorakhpur, India.
  2. Department of Mechanical Engineering, National Institute of Technical Teachers’ Training and Research, Kolkata, India.

Influence of Carbon Particle in Polymer Matrix Composite over Mechanical Properties and Tribology Behavior

K. Sravanthi V. Mahesh B. Nageswara Rao
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 4 | 1171-1178 | DOI: 10.24425/amm.2021.136433
Keywords Carbon epoxy CNT Mechanical Tribological
Download PDF Download RIS Download Bibtex

Abstract

In this research, the carbon particle dispersions are made in two different levels as carbon nano tube (CNT) and carbon particle in microns range. The mechanical strength is evaluated for the composites developed by axial loading and bending test analysis. In addition, the air jet abrasive particle erosion study is performed for different angle of impingement. The dispersion of carbon particle in the matrix material has reduced the mechanical strength. The sample with 4% of CNT dispersion in the composite has a maximum strength of 143 MPa and a minimum strength of 112 MPa. For the same combination (4% of CNT composite), the maximum flexural strength is 116 MPa. It is clear to infer that the strength of CNT in matrix materials is superior to the increase in length of carbon particle. The dispersion of carbon particle in the matrix material increases the brittleness and the strength is diminished. During the flexural bending, the fiber delamination occurred with severe deformation in the plain composite. When the materials are subjected to impingement of solid particle, the attrition effect on the exposed surfaces is vulnerable towards erosive mechanism. The presence of carbon in the matrix material has significantly increased the surface property. The results are appreciable for 4% of CNT composite. Especially at 30º, the minimum erosive wear 0.0033 g/g has been recorded. Erosive wear is less at minimum impingement angle and the wear is found increasing at higher impingement angle. Therefore, it is recommended not to add carbon particle to a higher weight percentage, since it leads to brittleness.
Go to article

Bibliography

[1] S. Wu, S. Peng, C. Wang, Polym. 10 (5), 542 (2018). DOI: https://doi.org/10.3390/polym10050542
[2] K. Sravanthi, V. Mahesh, B. Nageswara Rao, Mater. Today Proc. (2020). DOI: https://doi.org/10.1016/j.matpr.2020.06.298
[3] P. Naik, S. Pradhan, P. Sahoo, S.K. Acharya, Mater. Today Proc. 26, 1892-1896 (2020). DOI: https://doi.org/10.1016/j.matpr.2020.02.414
[4] R .K. Nayak, D. Rathore, B.C. Routara, B.C. Ray, Int. J. Plast. Technol. 20 (2), 334-344 (2016). DOI: https://doi.org/10.1007/s12588-016-9158-z
[5] R .K. Nayak, A. Dash, B.C. Ray, Procedia Mater. Sci. 6, 1359-1364 (2014). DOI: https://doi.org/10.1016/j.mspro.2014.07.115
[6] J.N. Coleman, U. Khan, W.J. Blau, Y.K. Gun’ko, Carbon N. Y. 44 (9), 1624-1652 (2006). DOI: https://doi.org/10.1016/j.carbon.2006.02.038
[7] G . Zhang, Z. Rasheva, J. Karger-Kocsis, T. Burkhart, Express Polym. Lett. 5 (10), 859-872 (2011). DOI: https://doi.org/10.3144/expresspolymlett.2011.85
[8] C. Lee, X. Wei, J. W. Kysar, J. Hone, Science, 321 (58), 385-388 (2008). DOI: https://doi.org/10.1126/science.1157996
[9] Z. Spitalsky, D. Tasis, K. Papagelis, C. Galiotis, Prog. Polym. Sci. 35 (3), 357-401 (2010). DOI: https://doi.org/10.1016/j.progpolymsci.2009.09.003
[10] B.-X. Yang, K.P. Pramoda, G.Q. Xu, S.H. Goh, Adv. Funct. Mater. 17 (13), 2062-2069 (2007). DOI: https://doi.org/10.1002/adfm.200600599
[11] L . Gorbatikh, S.V. Lomov, I. Verpoest, Procedia Eng. 10, 3252- 3258 (2011). DOI: https://doi.org/10.1016/j.proeng.2011.04.537
[12] S.S. Wicks, R.G. de Villoria, B.L. Wardle, Compos. Sci. Technol. 70 (1), 20-28 (2010). DOI: https://doi.org/10.1016/j.compscitech.2009.09.001
[13] N . Chisholm, H. Mahfuz, V.K. Rangari, A. Ashfaq, S. Jeelani, Compos. Struct. 67 (1), 115-124 (2005). DOI: https://doi.org/10.1016/j.compstruct.2004.01.010
[14] T . Peijs, F. Inam, D.W.Y. Wong, M. Kuwata, J. Nanomater. 2010 (2010). DOI: https://doi.org/10.1155/2010/453420
[15] K.S. Ahmed, S. Vijayarangan, A.C.B. Naidu, Mater. Des. 28 (8), 2287-2294 (2007). DOI: https://doi.org/10.1016/j.matdes.2006.08.002
[16] D.P.N. Vlasveld, P.P. Parlevliet, H.E.N. Bersee, S.J. Picken, Compos. Part A Appl. Sci. Manuf. 36 (1), 1-11 (2005). DOI: https://doi.org/10.1016/j.compositesa.2004.06.035
[17] B.K. Kandola, B. Biswas, D. Price, A.R. Horrocks, Polym. Degrad. Stab. 95 (2), 144-152 (2010). DOI: https://doi.org/10.1016/j.polymdegradstab.2009.11.040
[18] T .P. Chua, M. Mariatti, A. Azizan, A.A. Rashid, Compos. Sci. Technol. 70 (4), 671-677 (2010). DOI: https://doi.org/10.1016/j.compscitech.2009.12.023
[19] N . Mohan, S. Natarajan, S.P. KumareshBabu, Mater. Des. 32 (3), 1704-1709 (2011). DOI: https://doi.org/10.1016/j.matdes.2010.08.050
[20] S.P. Jani, A. Senthil Kumar, M. Adam Khan, M. Uthaya Kumar. Mater. Manuf. Processes. 31 (10), 1393-1399 (2016).
Go to article

Authors and Affiliations

K. Sravanthi
1 2
ORCID: ORCID
V. Mahesh
3
ORCID: ORCID
B. Nageswara Rao
1
ORCID: ORCID
  1. Deemed to be University, Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur522 502, India
  2. Marri Laxman Reddy Institute of Technology and Management, Department of Mechanical Engineering, Hyderabad, India
  3. SR Engineering College, Department of Mechanical Engineering, Warangal 506371, India

Investigation of transient heat transfer in composite walls using carbon/epoxy composites as an example

Janusz Terpiłowski Bartosz Gawron Grzegorz Woroniak
Archives of Thermodynamics | 2015 | No 4 December | 87-105 | DOI: 10.1515/aoter-2015-0035
Keywords thermal properties flash method thermal diffusivity carbon composites epoxy composites carbon fiber epoxy resin
Download PDF Download RIS Download Bibtex

Abstract

The paper presents the application of similarity theory to investigations of transient heat transfer in materials with complex structure. It describes the theoretical-experimental method for identification and design of the structure of two-component composite walls based on the research of the thermal diffusivity for the composite and its matrix separately. The thermal diffusivity was measured by means of the modified flash method. The method was tested on two samples of double-layer ‘epoxy resin – polyamide’. All the investigated samples had the same diameter of 12 mm and thickness ranging from 1.39–2.60 mm and their equivalent value of thermal diffusivity ranging from (1.21–1.98)×10-7m2/s. Testing the method and research on carbon/epoxy composites was carried out at temperatures close to room temperature.
Go to article

Authors and Affiliations

Janusz Terpiłowski
Bartosz Gawron
Grzegorz Woroniak

The Analysis of the Thermal and Dielectric Properties of High Voltage Insulating Materials with the Addition of Aluminium Oxide

T. Tomášková P. Trnka M. Gutten D. Korenčiak
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 2 | DOI: 10.24425/122388
Keywords electroinsulation systems dielectric properties epoxy resin aluminum oxide temperature frequency
Download PDF Download RIS Download Bibtex

Abstract

This article describes the influence of thermal and dielectric properties of materials to properties of electrical insulating systems in high voltage electrical equipment. The aim of this experiment is to improve the thermal and dielectric properties of electrical insulating (composite) materials using micro fillers of aluminium oxide Al2O3. Supplement of fillers of aluminium oxide with better thermal conductivity to the electrical insulating systems can be modified to increase their thermal conductivity. Improving the thermal conductivity of electric insulation by addition of micro- or nanofillers and in the same time not adversely affecting the dielectric properties is the objective of the study. Paper is presenting the results measured on prepared samples. Improved thermal conductivity is compared with other dielectric properties as: dissipation factor temperature dependences, resistivity and dielectric spectroscopy. To determine the dielectric insulating properties the following characteristics were measured: tanδ versus temperature from 110°C to 150°C, absorption and resorption currents, volume resistivity. Furthermore, this article describes analysis of moisture and conductivity the material by dielectric spectroscopy.
Go to article

Authors and Affiliations

T. Tomášková
P. Trnka
M. Gutten
D. Korenčiak

Cold Field-Emission Cathode Noise Analysis

Alexandr Knápek Lubomír Grmela Josef Šikula Ondřej Šik
Metrology and Measurement Systems | 2012 | No 2 | 417-422 | DOI: 10.2478/v10178-012-0036-5
Keywords cold field-emission cathode noise diagnostics epoxy coating
Download PDF Download RIS Download Bibtex

Abstract

Noise diagnostics has been performed on the cold field-emission cathode in high-vacuum. The tested cold field-emission cathode, based on tungsten wire with ultra-sharp tip coated by epoxy was designed to meet the requirements of transmission electron microscopy, which uses a small and stable source of electrons. Current fluctuations are reduced by improving the structure and fabrication technology. Noise was measured both in time and frequency domains, which gives information about current fluctuations and also about charge transport. Mutual correlation between the noise spectral density, extractor voltage and beam brightness was analyzed.

Go to article

Authors and Affiliations

Alexandr Knápek
Lubomír Grmela
Josef Šikula
Ondřej Šik

Mechanical and Dielectric Properties of Hybrid Carbon Nanotubes-Woven Glass Fibre Reinforced Epoxy Laminated Composites via the Electrospray Deposition Method

Muhammad Razlan Zakaria Nur Aishahatul Syafiqa Mohammad Khairuddin Mohd Firdaus Omar Hazizan Md Akil Muhammad Bisyrul Hafi Othman Mohd Mustafa Al Bakri Abdullah Shayfull Zamree Abd Rahim Sam Sung Ting Azida Azmi
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 2 | 669-675 | DOI: 10.24425/amm.2022.137804
Keywords Glass fibre carbon nanotubes Hybrid Material Epoxy Laminated Composites
Download PDF Download RIS Download Bibtex

Abstract

Herein, the effects of multi-walled carbon nanotubes (CNTs) on the mechanical and dielectric performance of hybrid carbon nanotube-woven glass fiber (GF) reinforced epoxy laminated composited are investigated. CNTs are deposited on woven GF surface using an electrospray deposition method which is rarely reported in the past. The woven GF deposited with CNT and without deposited with CNT are used to produce epoxy laminated composites using a vacuum assisted resin transfer moulding. The tensile, flexural, dielectric constant and dielectric loss properties of the epoxy laminated composites were then characterized. The results confirm that the mechanical and dielectric properties of the woven glass fiber reinforced epoxy laminated composited increases with the addition of CNTs. Field emission scanning electron microscope is used to examine the post damage analysis for all tested specimens. Based on this finding, it can be prominently identified some new and significant information of interest to researchers and industrialists working on GF based products.
Go to article

Authors and Affiliations

Muhammad Razlan Zakaria
1 2
ORCID: ORCID
Nur Aishahatul Syafiqa Mohammad Khairuddin
3
ORCID: ORCID
Mohd Firdaus Omar
1 2
ORCID: ORCID
Hazizan Md Akil
3
ORCID: ORCID
Muhammad Bisyrul Hafi Othman
4
ORCID: ORCID
Mohd Mustafa Al Bakri Abdullah
1 2
ORCID: ORCID
Shayfull Zamree Abd Rahim
2
ORCID: ORCID
Sam Sung Ting
1 2
ORCID: ORCID
Azida Azmi
1
ORCID: ORCID
  1. Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, Perlis, Malaysia
  2. Universiti Malaysia Perlis (UniMAP), Geopolymer & Green Technology, Centre of Excellent (CEGeoGTech), Perlis, Malaysia
  3. Universiti Sains Malaysia, School of Materials and Mineral Resources Engineering, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia
  4. Universiti Sains Malaysia, School of Chemical Sciences, 11800 Minden, Penang, Malaysia

Enhancement of Tensile Properties of Glass Fibre Epoxy Laminated Composites Reinforced with Carbon Nanotubes interlayer using Electrospray Deposition

Muhammad Razlan Zakaria Mohd Firdaus Omar Hazizan Md Akil Muhammad Bisyrul Hafi Othman Mohd Mustafa Al Bakri Abdullah
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 2 | 685-690 | DOI: 10.24425/amm.2022.137806
Keywords Glass fibre carbon nanotubes Hybrid Material Epoxy Laminated Composites
Download PDF Download RIS Download Bibtex

Abstract

The introduction of carbon nanotubes (CNTs) onto glass fibre (GF) to create a hierarchical structure of epoxy laminated composites has attracted considerable interest due to their merits in improving performance and multifunctionality. Field emission scanning electron microscopy (FESEM) was used to analyze the woven hybrid GF-CNT. The results demonstrated that CNT was successfully deposited on the woven GF surface. Woven hybrid GF-CNT epoxy laminated composites were then prepared and compared with woven GF epoxy laminated composites in terms of their tensile properties. The results indicated that the tensile strength and tensile modulus of the woven hybrid GF-CNT epoxy laminated composites were improved by up to 9% and 8%, respectively compared to the woven hybrid GF epoxy laminated composites.
Go to article

Authors and Affiliations

Muhammad Razlan Zakaria
1 2
ORCID: ORCID
Mohd Firdaus Omar
1 2
ORCID: ORCID
Hazizan Md Akil
3
ORCID: ORCID
Muhammad Bisyrul Hafi Othman
4
ORCID: ORCID
Mohd Mustafa Al Bakri Abdullah
1 2
ORCID: ORCID
  1. Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology Perlis, Malaysia
  2. Universiti Malaysia Perlis (UniMAP), Geopolymer & Green Technology, Centre of Excellent (CEGeoGTech), Perlis, Malaysia
  3. Universiti Sains Malaysia, School of Materials and Mineral Resources Engineering, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia
  4. Universiti Sains Malaysia, School of Chemical Sciences, 11800 Minden, Penang, Malaysia

Fabrication and Different Characterization of Graphene Nano Platelets Reinforced Epoxy Nano Composites

A. Namdev R. Purohit A. Telang A. Kumar
Archives of Metallurgy and Materials | 2023 | vol. 68 | No 2 | 823-832 | DOI: 10.24425/amm.2023.143675
Keywords Nano polymer composite microstructure GNP epoxy mechanical properties
Download PDF Download RIS Download Bibtex

Abstract

In this research, Graphene nanoplatelets (GNP) reinforced epoxy nano composites were fabricated via magnetic stirrer and ultra sonification assisted hand layup method. The impact of different weight percentage of GNP (0, 0.25, 0.50, and 1.0%) on different characteristics of nano composites was evaluated. The microstructure analysis of developed nano composite was determined by Field emission scanning electron microscopy. It was examined that epoxy nano composites containing 0.5 wt.% GNP have the highest tensile, flexural, and impact strength compared to neat epoxy. The reduction in tensile and flexural strength is achieved at 1% of GNP. Adding more nanofiller to a certain limit causes non-uniform dispersion and agglomeration of nanoparticles, which results in a reduction in properties. The 1% GNP reinforced nano composite has the highest value of shore hardness.
Go to article

Authors and Affiliations

A. Namdev
1
ORCID: ORCID
R. Purohit
1
A. Telang
1
A. Kumar
1
  1. Maulana Azad National Institute of Technology, Department of Mechanical Engineering Bhopa l, Madhya Pradesh, India

Surface based cohesive behavior implementation for the strength analysis of glued-in threaded rods in Glulam

T. Gečys G. Šaučiuvėnas L. Ustinovichius C. Miedzialowski P. Sulik
Bulletin of the Polish Academy of Sciences Technical Sciences | 2020 | 68 | No. 5 (i.a. Special Section on Modern control of drives and power converters) | 1149-1157 | DOI: 10.24425/bpasts.2020.134665
Keywords glued-in rods epoxy glue finite element modelling threaded steel rod
Download PDF Download RIS Download Bibtex

Abstract

The paper presents the analysis of strength and stiffness of metric threaded steel rods glued in glulam obtained by using two different gluing methods. The first method is used when the threaded steel rod is glued into a groove larger than the rod’s diameter, while the second method is applied when the diameter of the groove is smaller than the diameter of the threaded steel rod. The steel rod is covered with glue before it is inserted into the smaller diameter groove. The first method investigates the 2-mm-thick glue-line, while the second method analyses the contact when the groove’s diameter is 2 mm smaller than the outer diameter of the rod. Epoxy-type resin is used for both gluing methods. Different gluing methods present different interactions between the steel rod and glulam which result in different failure modes. The second method presents a plastic failure between the steel rod and glulam caused by the local compression and shear of glulam. The presented studies are made using metric threaded steel rods of diameters M12 and M16. In total, 20 specimens are experimentally tested in tension-to-tension tests performed according to EN 26891. The interaction between glulam and glued steel rods is also investigated using the 3D finite element modelling. The results obtained using the proposed 3D finite element model with different contact conditions between steel and glulam and the failure criterion for timber shear are well in line with the experimental findings.

Go to article

Authors and Affiliations

T. Gečys
G. Šaučiuvėnas
L. Ustinovichius
C. Miedzialowski
P. Sulik

Effects of pumice additions on thermal and mechanical behaviors of epoxy resin

İbrahim Kırbaş
Bulletin of the Polish Academy of Sciences Technical Sciences | 2023 | 71 | 4 | e146286 | DOI: 10.24425/bpasts.2023.146286
Keywords epoxy resin pumice thermal degradation thermal conductivity coefficient mechanical properties
Download PDF Download RIS Download Bibtex

Abstract

In this study, thermal conductivity, mechanical properties, and thermal degradation of pumice-added epoxy materials were investigated. 2%, 4%, 6%, 8%, and 10% of pumice was added to the epoxy resin (EP) % by weight. Various types of analyses and tests were conducted to determine the thermal conductivity, mechanical properties, and thermal degradation of these epoxy materials. The tests and analyses proved that the addition of pumice leads to a decrease in the thermal conductivity coefficient and density of the pure EP material. It also increases the degree of hardness. The addition of pumice had a positive effect on mechanical properties. Compared to pure EP, it increased the tensile strength, Young’s modulus, bending strength, and flexural modulus. As a result of TGA analysis it was determined that with the incorporation of pumice into the EP, its decomposition rate progressed more slowly. At 800_C, the carbon residue improved as a result of the addition of pumice.
Go to article

Authors and Affiliations

İbrahim Kırbaş
1
ORCID: ORCID
  1. Burdur Mehmet Akif Ersoy University, Department of Electrical and Energy, 15100, Burdur, Turkey

Surface Integrity Evaluation on Aluminium-Epoxy Composite in Machining using Taguchi Method

K.W. Leong Z. Shayfull M. Fathullah M.F. Omar M.M.A. Abdullah H. Radhwan A.H. Mazlan B. Jeż M. Nabiałek
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 1 | 233-239 | DOI: 10.24425/amm.2022.137495
Keywords Hybrid Mold Metal Epoxy composite (MEC) machining Injection Molding Process
Download PDF Download RIS Download Bibtex

Abstract

The increasing needs of using aluminum epoxy composite as a replacement to solid metal rapid prototyping has opened to interests in optimizing its machining processes. This paper reported on the success of optimizing the surface roughness of aluminium epoxy composite using milling process along with a new finding on the best combination parameters. Taguchi method was used as the optimization method whereas spindle speed, feed rate, and depth of cut were set as input factors using an L9 Orthogonal Array. Analysis of Variance was used to identify the significant factors influencing the surface roughness. Experiment was conducted in dry condition using a vertical milling machine and the surface roughness after the machining was evaluated. Optimum combination of cutting parameters was identified after the finest surface roughness (response) based on the signal-to-noise ratio calculated. Cutting parameters selected after preliminary testing are cutting speeds of (2000, 3000 and 4000) rpm, feed rate (300, 400 and 500) mm/min, and cutting depth (0.15, 0.20, and 0.25) mm. The result showed that cutting speed had the largest percentage contribution to surface roughness with 69% and the second highest contribution was feed rate with 22% and depth of cut at 9%. The spindle speed was found as the most significant factor influencing the quality of surface roughness. The result is significant particularly in providing important guidelines for industries in selecting the right combination of parameters as well as to be cautious with the most significant factor affecting the milling process of metal epoxy composite.
Go to article

Authors and Affiliations

K.W. Leong
1 2
ORCID: ORCID
Z. Shayfull
1 2
ORCID: ORCID
M. Fathullah
1 2
ORCID: ORCID
M.F. Omar
2
ORCID: ORCID
M.M.A. Abdullah
2
ORCID: ORCID
H. Radhwan
1 2
A.H. Mazlan
1
ORCID: ORCID
B. Jeż
3
ORCID: ORCID
M. Nabiałek
3
ORCID: ORCID
  1. Universiti Malaysia Perlis, Faculty of Mechanical Engineering Technology, Perlis, Malaysia
  2. Universiti Malaysia Perlis, Center of Excellence Geopolymer and Green Technology (CEGeoGTech), Perlis, Malaysia
  3. Częstochowa University of Technology, Faculty of Production Engineering and Materials Technology, Department of Physics, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland

Synergistic Toughening and Strengthening of an Epoxy Resin Modified by the Simultaneous Use of Two Different Modifiers

Anita Białkowska Patryk Suroń Wojciech Kucharczyk Barbora Hanulikova Mohamed Bakar
Bulletin of the Polish Academy of Sciences Technical Sciences | Early Access | e149176 | DOI: 10.24425/bpasts.2024.149176
Keywords epoxy resin hybrid composites mechanical and thermal properties structure morphology
Download PDF Download RIS Download Bibtex

Abstract

The present work investigated the effect of modifying an epoxy resin using two different modifiers. The mechanical and thermal properties were evaluated as a function of modifier type and content. The structure and morphology were also analyzed and related to the measured properties. Polyurethane (PUR) was used as a liquid modifier, while Cloisite Na+ and Nanomer I.28E are solid nanoparticles. Impact strength (IS) of hybrid nanocomposites based on 3.5 wt% PUR and 2 wt% Cloisite or 3.5wt% PUR and 1wt% Nanomer was maximally increased by 55% and 30% respectively compared to the virgin epoxy matrix, exceeding that of the two epoxy/nanoparticle binaries but not that of the epoxy/PUR binary. Furthermore, a maximum increase in IS of approximately 20% compared to the pristine matrix was obtained with the hybrid epoxy nanocomposite containing 0.5 wt% Cloisite and 1 wt% Nanomer, including a synergistic effect, due most likely to specific interactions between the nanoparticles and the epoxy matrix. The addition of polyurethane and nanoclays increased significantly the thermal stability of epoxy composites. However, DSC results showed that the addition of flexible polyurethane chains decreased the glass transition temperatures, while the softening point and the service temperature range of epoxy nanocomposites containing nanofillers were increased. FTIR analysis confirmed the occurrence of interaction between the epoxy matrix and added modifiers. All SEM micrographs showed significant roughness of the fracture surfaces with the formation of elongated platelets, explaining the increase in mechanical properties of the epoxy matrix.
Go to article

Authors and Affiliations

Anita Białkowska
Patryk Suroń
Wojciech Kucharczyk
Barbora Hanulikova
Mohamed Bakar
ORCID: ORCID

Ultrasonic IR thermographic inspection of graphite epoxy composite: a comparative study of piezoelectric and magnetostrictive stimulation

W. Swiderski V. Vavilov
Opto-Electronics Review | 2015 | vol. 23 | No 1 | 33-36
Keywords nondestructive testing IR thermography ultrasonic graphite epoxy composite
Download PDF Download RIS Download Bibtex

Abstract

In this paper the experimental results of piezoelectric and magnetostrictive ultrasonic stimulation are comparatively analyzed in the evaluation of impact damage in a graphite epoxy composite sample chosen for a round robin test. By comparing theoretical and experimental results, it is shown that the equivalent power of internal friction can reach some hundreds mill watt per a single crack.

Go to article

Authors and Affiliations

W. Swiderski
V. Vavilov

Examination of the Properties of Samples from Glass-Epoxy Core Rods for Composite Insulators Subjected to DC High Voltage

K. Wieczorek M. Jaroszewski P. Ranachowski Z. Ranachowski
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 3 | 1281-1286 | DOI: 10.24425/123802
Keywords DC high voltage composite insulator glass-epoxy core dielectric spectroscopy Raman spectroscopy
Download PDF Download RIS Download Bibtex

Abstract

This article presents the results of an examination performed on a set of samples of glass-epoxy core rods used in composite insulators with silicone rubber housings. The goal of the examination was to test the aging resistance of the core material when exposed to Direct Current (DC) high voltage. Long term exposure of a glass-epoxy core rod to DC high voltage may lead to the gradual degradation of its mechanical properties due to the ion migrations. Electrolysis of the core material (glass fiber) may cause electrical breakdown of the insulators and consequently lead to a major failure. After being aged for 6000 hours under DC high voltage, the samples were subjected to microscopic analysis. Their chemical composition was also examined using Raman spectroscopy and their dielectric losses and conductance in the broad range of frequencies were tested using dielectric spectroscopy.

Go to article

Authors and Affiliations

K. Wieczorek
M. Jaroszewski
P. Ranachowski
Z. Ranachowski

Sound Absorption Characteristics of Pineapple Leaf/Epoxy Composite

Damar Rastri Adhika Iwan Prasetiyo Abiyoga Noeriman Nurul Hidayah Widayani
Archives of Acoustics | 2020 | vol. 45 | No 2 | 233-240 | DOI: 10.24425/aoa.2020.133144
Keywords natural fibres pineapple leaf/epoxy composite sound absorber absorption prediction model
Download PDF Download RIS Download Bibtex

Abstract

Natural fibres are attractive as the raw material for developing sound absorber, as they are green, eco-friendly, and health friendly. In this paper, pineapple leaf fibre/epoxy composite is considered in sound absorber development where several values of mechanical pressures were introduced during the fabrication of absorber composite. The results show that the composite can absorb incoming sound wave, where sound absorption coefficients α _n > 0.5 are pronounced at mid and high frequencies. It is also found that 23.15 kN/m^2 mechanical pressure in composite fabrication is preferred, while higher pressure leads to solid panel rather than sound absorber so that the absorption capability reduces. To extend the absorption towards lower frequency, the composite absorber requires thickness higher than 3 cm, while a thinner absorber is only effective at 1 kHz and above. Additionally, it is confirmed that the Delany-Bazley formulation fails to predict associated absorption behavior of pineapple leaf fibre-based absorber. Meanwhile, a modified Delany-Bazley model discussed in this paper is more useful. It is expected that the model can assist further development of the pineapple leaf composite sound absorber.

Go to article

Authors and Affiliations

Damar Rastri Adhika
Iwan Prasetiyo
Abiyoga Noeriman
Nurul Hidayah
Widayani

Pull-off Adhesion Strength of Poly-p-phenylene Benzobisoxazole (PBO) – Reinforced Timber

P.K. Sokołowski P.G. Kossakowski
Archives of Civil Engineering | Vol. 66 | No 1 | 179-196 | DOI: 10.24425/ace.2020.131782
Keywords pull-off test Composite timber adhesion Epoxy resins poly-p- phenylene benzobisoxazole (PBO)
Download PDF Download RIS Download Bibtex

Abstract

The article discusses results of pull-off adhesion strength tests on poly-p- phenylene benzobisoxazole (PBO) mesh bonded to fir timber beams using epoxy resin. The tests were performed in accordance with the PN-EN 1542 standard. Timber elements reinforced with PBO fibres were subjected to pull-off tests to measure the adhesive strength of the mesh to the beams.The factors occurring during the test were also characterized, which may affect its results such as the method of application of the tearing force, selection of epoxy glue, surface preparation of the tested elements, occurrence of material defects in the wood and types of substrate destruction.The experimental data show that failure of the timber layer was not observed in all the specimens tested.

Go to article

Authors and Affiliations

P.K. Sokołowski
P.G. Kossakowski

Experimental study of low cycle fatigue properties for epoxy resins with dibutyl phthalate (DBP)

Zhi Wang Jiajia Zhou Linjian Song Long Li
Archives of Civil Engineering | 2018 | Vol. 64 | No 2 | 147-159
Keywords Low cycle fatigue Dibutyl Phthalate (DBP) Epoxy resins Strain energy Fatigue life
Download PDF Download RIS Download Bibtex

Abstract

In order to improve the toughness of traditional epoxy resin, dibutyl phthalate (DBP) was introduced into the epoxy resin. The static mechanical performance of plasticized and unplasticized epoxy resin was evaluated. The test results showed that the DBP modified epoxy resin can obtain a higher toughness than conventional epoxy resin, but the elastic modulus and the tensile strength were slightly reduced. The low cycle fatigue test results indicated that the stress ratio and the stress level were two critical factors of fatigue life, which was increased with the growth of stress ratio. It was also found that the fatigue life of plasticized specimen was much less than that of the unplasticized specimen because of the plastic deformation. A logarithmic linear relationship was then established to predict the fatigue life for plasticized epoxy resin. The strain energy density was also applied to demonstrate the accumulation of energy loss. In addition, the fatigue toughness can be obtained by the hysteresis loop area method.

Go to article

Authors and Affiliations

Zhi Wang
Jiajia Zhou
Linjian Song
Long Li

Wood-based composite materials in the aspect of structural new generation materials. Recognition research

Anna Czajkowska Tomasz Rydzkowski Dorota Laskowska
Bulletin of the Polish Academy of Sciences Technical Sciences | 2024 | 72 | 1 | e146618 | DOI: 10.24425/bpasts.2023.146618
Keywords composite material wind turbine wind turbine recycling plastics wood-based composites epoxy resin polyester resin
Download PDF Download RIS Download Bibtex

Abstract

Composite materials are a constantly evolving group of engineering materials, which has significantly changed their current, and potential role as structural materials over the past decades. Composites offer greater strength, stiffness, and less deformation to structural designers than previously available engineering materials. Resin matrix composites are widely used in the transportation, marine, aerospace, energy, and even sports industries. The manufacturing stage has a profound influence on the quality of the final product. This paper presents the production of composite materials by gravity casting in silicone moulds, using an epoxy/polyester resin matrix reinforced with wood chips and shredded glass fiber reinforced composite from recycled wind turbine blades. Some of the fabricated samples were degassed in a reduced-pressure chamber. The mechanical properties of the produced material were then examined. It was noted that the silicone moulds did not affect the resin self-degassing due to the large surface area to weight ratio, and the remaining small air bubbles had a limited effect on the mechanical properties of the samples. The filler used also played a significant role. Composites filled with crushed GFRC showed better strength properties than composites filled with wood chips. The conducted research is aimed at selecting materials for further testing with a view to their use in the manufacture of next-generation wood-based composite structural materials.
Go to article

Authors and Affiliations

Anna Czajkowska
1
ORCID: ORCID
Tomasz Rydzkowski
1
ORCID: ORCID
Dorota Laskowska
1
ORCID: ORCID
  1. Koszalin University of Technology, Faculty of Mechanical Engineering, Racławicka 15-17 street, 75-620 Koszalin, Poland

This page uses 'cookies'. Learn more