Archive of Mechanical Engineering

Keywords:

Abstract

This paper presents an extended finite element method applied to solve phase change problems taking into account natural convection in the liquid phase. It is assumed that the transition from one state to another, e.g., during the solidification of pure metals, is discontinuous and that the physical properties of the phases vary across the interface. According to the classical Stefan condition, the location, topology and rate of the interface changes are determined by the jump in the heat flux. The incompressible Navier-Stokes equations with the Boussinesq approximation of the natural convection flow are solved for the liquid phase. The no-slip condition for velocity and the melting/freezing condition for temperature are imposed on the interface using penalty method. The fractional four-step method is employed for analysing conjugate heat transfer and unsteady viscous flow. The phase interface is tracked by the level set method defined on the same finite element mesh. A new combination of extended basis functions is proposed to approximate the discontinuity in the derivative of the temperature, velocity and the pressure fields. The single-mesh approach is demonstrated using three two-dimensional benchmark problems. The results are compared with the numerical and experimental data obtained by other authors.

Go to article

Bibliography

[1] A. Faghri and Y. Zhang. Transport Phenomena in Multiphase Systems. Elsevier, 2006.
[2] S.C. Gupta. The Classical Stefan Problem: Basic Concepts, Modelling and Analysis. Elsevier, 2003.
[3] V. Alexiades and S.D. Solomon. Mathematical Modeling of Melting and Freezing Processes. Hemisphere Publ. Co, Washington DC, 1993.
[4] O.C. Zienkiewicz, R.L. Taylor, and P. Nithiarasu. The Finite Element Method for Fluid Dynamics, 6th edition. Elsevier Butterworth-Heinemann, Burlington, 2005.
[5] K. Morgan. A numerical analysis of freezing and melting with convection. Computer Methods in Applied Mechanics and Engineering, 28(3):275–284, 1981. doi: 10.1016/0045-7825(81)90002-5.
[6] J. Mackerle. Finite elements and boundary elements applied in phase change, solidification and melting problems. A bibliography (1996–1998). Finite Elements in Analysis and Design, 32(3):203–211, 1999. doi: 10.1016/S0168-874X(99)00007-4.
[7] S. Wang, A. Faghri, and T.L. Bergman. A comprehensive numerical model for melting with natural convection. International Journal of Heat and Mass Transfer, 53(9-10):1986–2000, 2010. doi: 10.1016/j.ijheatmasstransfer.2009.12.057.
[8] G. Vidalain, L. Gosselin, and M. Lacroix. An enhanced thermal conduction model for the prediction of convection dominated solid–liquid phase change. International Journal of Heat and Mass Transfer, 52(7-8):1753–1760, 2009. doi: 10.1016/j.ijheatmasstransfer.2008.09.020.
[9] I. Danaila, R. Moglan, F. Hecht, and S. Le Masson. A Newton method with adaptive finite elements for solving phase-change problems with natural convection. Journal of Computational Physics, 274:826–840, 2014. doi: 10.1016/j.jcp.2014.06.036.
[10] J.M. Melenk and I. Babuska. The partition of unity finite element method: basic theory and application. Computer Methods in Applied Mechanics and Engineering. 139(1-4):289–314, 1996. doi: 10.1016/S0045-7825(96)01087-0.
[11] A. Cosimo, V. Fachinotti, and A. Cardona. An enrichment scheme for solidification problems. Computational Mechanics, 52(1):17–35, 2013. doi: 10.1007/s00466-012-0792-9.
[12] T. Belytschko and T. Black. Elastic crack growth in finite elements with minimal remeshing. International Journal for Numerical Methods in Engineering, 45(5):601–620, 1999. doi: 10.1002/(SICI)1097-0207(19990620)45:5601::AID-NME598>3.0.CO;2-S.
[13] R. Merle and J. Dolbow. Solving thermal and phase change problems with the eXtended finite element method. Computational Mechanics, 28(5):339–350, 2002. doi: 10.1007/s00466-002-0298-y.
[14] J. Chessa, P. Smolinski, and T. Belytschko. The extended finite element method (XFEM) for solidification problems. International Journal for Numerical Methods in Engineering, 53(8):1959–1977, 2002. doi: 10.1002/nme.386.
[15] P. Stapór. The XFEM for nonlinear thermal and phase change problems. International Journal of Numerical Methods for Heat & Fluid Flow, 25(2):400–421, 2015. doi: 10.1108/HFF-02-2014-0052.
[16] N. Zabaras, B. Ganapathysubramanian, and L. Tan. Modelling dendritic solidification with melt convection using the extended finite element method. Journal of Computational Physics, 218(1):200–227, 2006. doi: 10.1016/j.jcp.2006.02.002.
[17] P. Stapór. A two-dimensional simulation of solidification processes in materials with thermodependent properties using XFEM. International Journal of Numerical Methods for Heat & Fluid Flow, 26(6):1661–1683, 2016. doi: 10.1108/HFF-01-2015-0018.
[18] J. Chessa and T. Belytschko. An enriched finite element method and level sets for axisymmetric two-phase flow with surface tension. International Journal for Numerical Methods in Engineering, 58(13):2041–2064, 2003. doi: 10.1002/nme.946.
[19] J. Chessa and T. Belytschko. An extended finite element method for two-phase fluids. Journal of Applied Mechanics, 70(11):10–17, 2003. doi: 10.1115/1.1526599.
[20] M. Li, H. Chaouki, J. Robert, D. Ziegler, D. Martin, and M. Fafard. Numerical simulation of Stefan problem with ensuing melt flow through XFEM/level set method. Finite Elements in Analysis and Design, 148:13–26, 2018. doi: 10.1016/j.finel.2018.05.008.
[21] D. Martin, H. Chaouki, J. Robert, D. Ziegler, and M. Fafard. A XFEM phase change model with convection. Frontiers in Heat and Mass Transfer, 10:1-11, 2018. doi: 10.5098/hmt.10.18.
[22] S. Osher and J.A. Sethian. Fronts propagating with curvature dependent speed: Algorithms based on Hamilton–Jacobi formulations. Journal of Computational Physics, 79(1):12–49, 1988. doi: 10.1016/0021-9991(88)90002-2.
[23] M. Stolarska, D.L. Chopp, N. Möes, and T. Belytschko. Modelling crack growth by level sets in the extended finite element method. International Journal for Numerical Methods in Engineering, 51(8):943–960, 2001. doi: 10.1002/nme.201.
[24] M. Sussman, P. Smereka, and S. Osher. A level set approach for computing solutions to incompressible two-phase flow. Journal of Computational Physics, 114(1):146–159, 1994. doi: 10.1006/jcph.1994.1155.
[25] M.Y. Wang, X. Wang, and D. Guo. A level set method for structural topology optimization. Computer Methods in Applied Mechanics and Engineering, 192(1-2):227–246, 2003. doi: 10.1016/S0045-7825(02)00559-5.
[26] N. Peters. Turbulent Combustion. Cambridge University Press, Cambridge, 2000.
[27] Y.H. Tsai and S. Osher. Total variation and level set methods in image science. Acta Numerica, 14:509–573, 2005. doi: 10.1017/S0962492904000273.
[28] V. Alexiades and J.B. Drake. A weak formulation for phase-change problems with bulk movement due to unequal densities. In J.M. Chadam and H. Rasmussen editors, Free Boundary Problems Involving Solids, pages 82–87, CRC Press, 1993.
[29] S. Chen, B. Merriman, S. Osher, and P. Smereka. A simple level set method for solving Stefan problems. Journal of Computational Physics, 135(1):8–29, 1997. doi: 10.1006/jcph.1997.5721.
[30] H. Sauerland. An XFEM Based Sharp Interface Approach for Two-Phase and free-Surface Flows. Ph.D. Thesis, RWTH Aachen University, Aachen, Germany, 2013.
[31] J.E. Tarancòn, A.Vercher, E. Giner, and F.J. Fuenmayor. Enhanced blending elements forXFEM applied to linear elastic fracture mechanics. I nternational Journal for Numerical Methods in Engineering, 77(1):126–148, 2009. doi: 10.1002/nme.2402.
[32] T.P. Fries. A corrected XFEM approximation without problems in blending elements. International Journal for Numerical Methods in Engineering, 75(5):503–532, 2008. doi: 10.1002/nme.2259.
[33] N. Moës, M. Cloirec, P. Cartraud, and J.F. Remacle. A computational approach to handle complex microstructure geometries. Computer Methods in Applied Mechanics and Engineering, 192(28-30):3163–3177, 2003. doi: 10.1016/S0045-7825(03)00346-3.
[34] G. Zi and T. Belytschko. New crack-tip elements for XFEM and applications to cohesive cracks. International Journal for Numerical Methods in Engineering, 57(15):2221–2240, 2003. doi: 10.1002/nme.849.
[35] G. Ventura, E. Budyn, and T. Belytschko. Vector level sets for description of propagating cracks in finite elements. International Journal for Numerical Methods in Engineering, 58(10):1571–1592, 2003. doi: 10.1002/nme.829.
[36] P. Stąpór. An improved XFEM for the Poisson equation with discontinuous coefficients. Archive of Mechanical Engineering, 64(1):123–144, 2017. doi: 10.1515/meceng-2017-0008.
[37] H.G. Choi, H. Choi, and J.Y. Yoo. A fractional four-step finite element formulation of the unsteady incompressible Navier-Stokes equations using SUPG and linear equal-order element methods. Computer Methods in Applied Mechanics and Engineering, 143(3-4):333–348, 1997. doi: 10.1016/S0045-7825(96)01156-5.
[38] R. Codina. Pressure stability in fractional step finite element methods for incompressible flows. Journal of Computational Physics, 170(1):112–140, 2001. doi: 10.1006/jcph.2001.6725.
[39] Z. Chen. Finite Element Methods and Their Applications. Springer, 2005.
[40] T. Belytschko,W.K. Liu, and B. Moran. Nonlinear Finite Elements for Continua and Structures. Wiley, 2000.
[41] T.A. Kowalewski and M. Rebow. Freezing of water in differentially heated cubic cavity. International Journal of Computational Fluid Dynamics, 11(3-4):193–210, 1999. doi: 10.1080/10618569908940874.
[42] T. Michałek and T.A. Kowalewski. Simulations of the water freezing process – numerical benchmarks. Task Quarterly, 7(3):389–408, 2003.
[43] M. Giangi, T.A.Kowalewski, F. Stella, and E. Leonardi.Natural convection during ice formation: numerical simulation vs. experimental results. Computer Assisted Mechanics and Engineering Sciences, 7(3):321–342, 2000.
[44] P. Stąpór. An enhanced XFEM for the discontinuous Poisson problem. Archive of Mechanical Engineering, 66(1):25–37, 2019. doi: 10.24425/ame.2019.126369.
[45] Thermal-FluidCentral. Thermophysical Properties: Phase Change Materials, 2010 (last accessed January 14, 2016). https://thermalfluidscentral.org.
[46] M. Okada. Analysis of heat transfer during melting from a vertical wall. I nternational Journal of Heat and Mass Transfer, 27(11):2057–2066, 1984. doi: 10.1016/0017-9310(84)90192-3.
[47] Z. Ma and Y. Zhang. Solid velocity correction schemes for a temperature transforming model for convection phase change. International Journal of Numerical Methods for Heat & Fluid Flow, 16(2):204–225, 2006. doi: 10.1108/09615530610644271.
Go to article

Authors and Affiliations

Paweł Stąpór
1

1. Faculty of Management and Computer Modelling, Kielce University of Technology, Kielce, Poland.
Keywords:

Abstract

LED light must be cooled to avoid reaching a certain temperature. Two different 3D practical domains of LED light are modelled, (i) square aluminium plate with a cylindrical plate and an LED module (model I), (ii) the same provision of model I with 25 fins (model II). ANSYS 16.0 is used for solving the problem. Temperature distribution, junction temperature (Tj) and heat flux are estimated. Analyses are carried out for various ambient temperatures (Ta) and for different LED power dissipations (Q) to identify the safe operating conditions. In model I, it is found that 38% of working conditions go beyond the critical limit of Tj and it is reduced to 21.4% in model II. In model II, for low Ta of 30 and 40ºC with all Q considered in this analysis are safer. If Ta is between 30 and 80ºC, then Q must be maintained at 0.5 to 1.25 W. Beyond this, conditions are not safe.

Go to article

Bibliography

[1] B.P. Minaker and Z. Yao. Design and analysis of an interconnected suspension for a small off-road vehicle. Archive of Mechanical Engineering, 64(1):5–21, 2017. doi: 10.1515/meceng-2017-0001.
[2] X-J. Zhao, Y-X. Cai, J. Wang, X-H. Li, and C. Zhang. Thermal model design and analysis of the high-power LED automotive headlight cooling device. Applied Thermal Engineering, 75:248–258, 2015. doi: 10.1016/j.applthermaleng.2014.09.066.
[3] D. Jang, S.J. Park, S.J. Yook, and K.S. Lee. The orientation effect for cylindrical heat sinks with applications to LED light bulbs. International Journal of Heat and Mass Transfer, 71:496–502, 2014. doi: 10.1016/j.ijheatmasstransfer.2013.12.037.
[4] N. Wang, J. Liu, Q. Zhang, H. Yang, and M. Tan. Fatigue life evaluation and failure analysis of light beam direction adjusting mechanism of an automobile headlight exposed to random loading. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 233(2):224-231, 2017. doi: 10.1177/0954407017740445.
[5] L. Sun, J. Zhu, and H. Wong. Simulation and evaluation of the peak temperature in LED light bulb heat sink. Microelectronics Reliability, 61:140–144, 2016. doi: 10.1016/j.microrel.2015.12.023.
[6] D. Luo, P. Ge, D. Liu, and and H. Wang. A combined lens design for an LED lowbeam motorcycle headlight. Lighting Research & Technology, 50(3):456–466, 2017. doi: 10.1177/1477153517697370.
[7] L. Kim, J.H. Choi, S.H. Jang, and M.W. Shin. Thermal analysis of LED array system with heat pipe. Thermochimica Acta, 455(1-2):21–25, 2007. doi: 10.1016/j.tca.2006.11.031.
[8] X.-Y. Lu, T.-C. Hua, and Y.-P. Wang. Thermal analysis of high power LED package with heat pipe heat sink. Microelectronics Journal, 42(11):1257–1262, 2011. doi: 10.1016/j.mejo.2011.08.009.
[9] C.-S. Kim, J.-G. Lee, J.-H. Cho, D.-Y. Kim, and T.-B.Seo. Experimental study of humidity control methods in a light-emitting diode (LED) lighting device. Journal of Mechanical Science and Technology, 29(6):2501–2508, 2015. doi: 10.1007/s12206-015-0546-7.
[10] X.-Y. Lu, T.-C. Hua, M.-J. Liu, and Y.-X. Cheng. Thermal analysis of loop heat pipe used for high-power LED. Thermochimica Acta, 493(1-2):25–29, 2009. doi: 10.1016/j.tca.2009.03.016.
[11] M. Janicki, T. Torzewicz, A. Samson, T. Raszkowski, A.Napieralski. Experimental identification of LED compact thermal model element values. Microelectronics Reliability, 86:20–26, 2018. doi: 10.1016/j.microrel.2018.05.003.
[12] K.C. Yung, H. Liem, and H.S. Choy. Heat transfer analysis of a high-brightness LED array on PCB under different placement configurations. International Communications in Heat and Mass Transfer, 53:79–86, 2014. doi: 10.1016/j.icheatmasstransfer.2014.02.014.
[13] M.W. Shin, and S.H. Jang. Thermal analysis of high power LED packages under the alternating current operation. Solid-State Electronics, 68:48–50, 2012. doi: 10.1016/j.sse.2011.10.033.
[14] J. Zhou, J. Huang, Y. Wang, and Z. Zhou. Thermal distribution of multiple LED module. Applied Thermal Engineering, 93:122–130, 2016. doi: 10.1016/j.applthermaleng.2015.09.022.
[15] K.-S. Yang, C.-H. Chung, C.-W. Tu, C.-C. Wong, T.-Y. Yang, and M.-T. Lee. Thermal spreading resistance characteristics of a high power light emitting diode module. Applied Thermal Engineering, 70(1):361–368, 2014. doi: 10.1016/j.applthermaleng.2014.05.028.
[16] K.-Y. Liao and S.H. Tseng. A superior design for high power GaN-based light-emitting diode packages. Solid-State Electronics, 104:96–100, 2015. doi: 10.1016/j.sse.2014.11.008.
[17] K.F. Sokmen, E. Pulat, N. Yamankaradeniz, and S. Coskun. Thermal computations of temperature distribution and bulb heat transfer in an automobile headlamp. Heat and Mass Transfer, 50(2):199–210, 2014. doi: 10.1007/s00231-013-1229-5.
[18] I. Kim, S. Cho, D. Jung, C.R. Lee, D. Kim, and B.J. Baek. Thermal analysis of high power LEDs on the MCPCB. Journal of Mechanical Science and Technology, 27(5):1493–1499, 2013. doi: 10.1007/s12206-013-0329-y.
[19] V.P. Chandramohan and P. Talukdar. Three dimensional numerical modeling of simultaneous heat and moisture transfer in a moist object subjected to convective drying. International Journal of Heat Mass Transfer, 53(21-22):4638–4650, 2010. doi: 10.1016/j.ijheatmasstransfer.2010.06.029.
[20] S. Yadav, A.B. Lingayat, V.P. Chandramohan, and V.R.K. Raju. Numerical analysis on thermal energy storage device to improve the drying time of indirect type solar dryer. Heat and Mass Transfer, 54(12):3631–3646, 2018. doi: 10.1007/s00231-018-2390-7.
[21] G. Arunsandeep and V.P. Chandramohan. Numerical solution for temperature and moisture distribution of rectangular, cylindrical and spherical objects during drying. Journal of Engineering Physics and Thermophysics, 91(4):895–906, 2018. doi: 10.1007/s10891-018-1814-z.
[22] T.A. Alves, P.H.D. Santos, and M.A. Barbur. An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in channel flow. Frontiers of Mechanical Engineering, 10(3):263–276, 2015. doi: 10.1007/s11465-015-0345-y.
[23] T.L. Bergman, F.P. Incropera, D.P. Dewitt, and A.S. Lavine. Fundamentals of Heat and Mass Transfer. 7th edition. John Wiley & Sons, 2011.
Go to article

Authors and Affiliations

Manbodh Kumar Mishra
1
V.P. Chandramohan
1
Karthik Balasubramanian
1

1. Department of Mechanical Engineering, National Institute of Technology Warangal, Telangana, India.
Keywords:

Abstract

This work is devoted to the plotting of coupler curves in the environment of graphical programs. As there is a large variety of shapes, for the purpose of this study, the authors selected those curves that feature a cusp form. In the research, two software programs were used, i.e., AutoCAD and Rhinoceros with the Grasshopper plug-in. Two types of curves were defined: a fixed and a moving centrode, in which the points of the moving centrode define the coupler curves whose cusps are located on the fixed centrode. In conclusion, two design tools were compared and the curves in question were discussed in detail.

Go to article

Bibliography

[1] H. Nolle. Linkage coupler curve synthesis: a historical review – II. Developments after 1875. Mechanism and Machine Theory, 9(3–4): 325–348, 1974. doi: .
[2] E. Macho,V. Petuya, M.Urízar, M. Diez, and A. Hernández. Educational and research kinematic capabilities of GIM software. In: B. Corves, E.C. Lovasz., M. Hüsing (eds), Mechanisms, Transmission and Applications, volume 31 of Mechanisms and Machine Science, pages 11–19. Springer, 2015. doi: 10.1007/978-3-319-17067-1_2.
[3] W.M. Hwang and K.H. Chen. Triangular nomograms for symmetrical spherical non-Grashof double-rockers generating symmetrical coupler curves. Mechanism and Machine Theory, 42(7):871–888, 2007. doi: .
[4] W.Y. Chuang. The characteristics of a coupler curve. Mechanism and Machine Theory, 40(10):1099–1106, 2005. doi: 10.1016/j.mechmachtheory.2005.02.003.
[5] Z. Lan, Z. Huijun, and L. Liuming. Kinematic decomposition of coupler plane and the study on the formation and distribution of coupler curves. Mechanism and Machine Theory, 37(1): 115–126, 2002. doi: 10.1016/S0094-114X(01)00054-4.
[6] P.S. Donelan and C.P. Scott. Real inflections of hinged planar four-bar coupler curves. Mechanism and Machine Theory, 30(8):1179–1191, 1995. doi: 10.1016/0094-114X(95)00047-3.
[7] J. Buskiewicz. Reduced number of design parameters in optimum path synthesis with timing of four-bar linkage. Journal of Theoretical and Applied Mechanics, 56(1):43–55, 2018. doi: 10.15632/jtam-pl.56.1.43.
[8] S. Bai. Geometric analysis of coupler-link mobility and circuits for planar four-bar linkages. Mechanism and Machine Theory, 118:53–64, 2017. doi: 10.1016/j.mechmachtheory.2017.07.019.
[9] J. W. Kim, T.W. Seo, and J. Kim. A new design methodology for four-bar linkage mechanisms based on derivations of coupler curve. Mechanism and Machine Theory, 100:138–154, 2016. doi: 10.1016/j.mechmachtheory.2016.02.006.
[10] S. Bai. Determination of linkage parameters from coupler curve equations. In: B. Corves, E.C. Lovasz., M. Hüsing (eds), Mechanisms, Transmission and Applications, volume 31 of Mechanisms and Machine Science, pages 49–57. Springer, 2015. doi: 10.1007/978-3-319-17067-1_6.
[11] S. Bai and J. Angeles. Coupler-curve synthesis of four-bar linkages via a novel formulation. Mechanism and Machine Theory, 94:177–187, 2015. doi: 10.1016/j.mechmachtheory.2015.08.010.
[12] R. Starosta. Application of genetic algorithm and Fourier coefficients (GA-FC) in mechanism synthesis. Journal of Theoretical and Applied Mechanics, 46(2):395–411, 2008.
[13] K. Russell and R.S. Sodhi. On the design of slider-crank mechanisms. Part II: multi-phase path and function generation. Mechanism and Machine Theory, 40(3):301–317, 2005. doi: 10.1016/j.mechmachtheory.2004.07.010.
[14] D.C. Tao and S. Krishnamoorthy. Linkage mechanism adjustable for variable coupler curves with cusps. Mechanisms and Machine Theory, 13(6):577–583, 1978. doi: 10.1016/0094-114X(78)90025-3.
[15] J.M. McCarthy and G.S. Soh. Geometric Design of Linkages. Springer, New York, 2nd edition, 2011.
[16] R.L.Norton. Design of Machinery: An Introduction of the Synthesis and Analysis of Mechanisms and Machines. McGraw-Hill, 2011.
[17] O. Vinogradov. Fundamentals of Kinematics and Dynamics of Machines and Mechanisms. CRC Press, 2000.
[18] K. Romaniak. The influence of the kinematic parameters at the course of the coupler plane of the mechanisms. International Conference on Geometry, Lviv, Ukraine, 2003.
[19] P. Schumacher. Design parameters to parametric design. In M. Kanaani and D. Kopec (eds) The Routledge Companion for Architecture Design and Practice, Rautledge, New York, 2016.
[20] A. Craifaleanu, C. Dragomirescu, and I.G. Craifaleanu. Virtual laboratory for the study of kinematics in engineering faculties. In: Chiu D.K.W., Wang M., Popescu E., Li Q., Lau R. (eds.), New Horizons in Web Based Learning, pp. 191–200, Springer. 2014. doi: 10.1007/978-3-662-43454-3_20.
Go to article

Authors and Affiliations

Krystyna Romaniak
1
Michał Nessel
1

1. Department of Architecture, Cracow University of Technology, Cracow, Poland.
Keywords:

Abstract

In the present work, an experimental investigation of a transverse fatigue crack has been carried out. A mathematical modelling of cracked rotor system along with the measured vibration is used to find crack parameters that not only detect the fault but also quantify it. Many experimental studies on cracks considered the crack as a slit or notch, which remains open. However, such flaws do not mimic a fatigue crack behavior, in which crack front opens and closes (i.e., breathes in a single revolution of the rotor). The fatigue crack in rotors commonly depicts 2x frequency component in the response, as well as higher frequency components, such as 3x, 4x and so on. In rotors, both forward and backward whirling take place due to asymmetry in rotor, and thus the fatigue crack gives the forward and backward whirl for all such harmonics. A rotor test rig was developed with a fatigue crack in it; rotor motions in two orthogonal directions were captured from the rig at discrete rotor angular speeds using proximity probes. The directional-spectrum processing technique has been utilized to the measured displacements to get its forward and backward whirl components. Subsequently, it is executed in a mathematical model-based estimation procedure to obtain the crack forces, residual unbalances, and remaining rotor system unknown variables. Estimation of crack forces during rotation of the shaft gives its characteristics, which can be used further to develop newer crack models.

Go to article

Bibliography

[1] Y. Ishida. Cracked rotors: Industrial machine case histories and nonlinear effects shown by a simple Jeffcott rotor. Mechanical Systems and Signal Processing, 22(4):805–817, 2008. doi: 10.1016/j.ymssp.2007.11.005.
[2] G. Sabnavis, R.G. Kirk, M. Kasarda, and D. Quinn. Cracked shaft detection and diagnostics: a literature review. The Shock and Vibration Digest, 36(4):287–296, 2004. doi: 10.1177/0583102404045439.
[3] N. Dharmaraju, R.Tiwari, and S. Talukdar. Identification of an open crack model in a beam based on force-response measurements. Computers & Structures, 82(2-3):167–179, 2003. doi: 10.1016/j.compstruc.2003.10.006.
[4] A.S. Sekhar. Crack identification in a rotor system: a model-based approach. Journal of Sound and Vibration, 270(4-5):887–902, 2004. doi: 10.1016/S0022-460X(03)00637-0.
[5] A.C. Chaselevris and C.A. Papodopoulos. Experimental detection of an early developed crack in rotor-bearing system using an AMB. Third International Conference of Engineering against Failure, June 26–28, 2013, Kos, Greece.
[6] P. Gudmundson. The dynamic behaviour of slender structures with cross-sectional cracks. Journal of the Mechanics and Physics of Solids, 31(4):329–345, 1983. doi: 10.1016/0022-5096(83)90003-0.
[7] C.A. Papadopoulos and A.D. Dimarogonas. Stability of the cracked rotors in the coupled vibration mode. Journal of Vibration, Acoustics, Stress, and Reliability in Design, 110(3):356–359, 1988.
[8] A.K. Darpe, K. Gupta, and A. Chawla. Experimental investigations of the response of a cracked rotor to periodic axial excitation. Journal of Sound and Vibration, 260(2):265–286, 2003. doi: 10.1016/S0022-460X(02)00944-6.
[9] T. Zhou, Z. Sun, J. Xu, andW. Han. Experimental analysis of cracked rotor. Journal of Dynamic systems, Measurement, and Control, 127(3):313–320, 2005. doi: 10.1115/1.1978908.
[10] P. Pennacchi, N. Bachschmid, and A. Vania. A model-based identification method of transverse cracks in rotating shafts suitable for industrial machines. Mechanical Systems and Signal Processing, 20(8):2112–2147, 2006. doi: .
[11] J.K. Sinha. Higher order spectra for crack and misalignment identification in the shaft of a rotating machine. Structural Health Monitoring, 6(4):325–334, 2007. doi: 10.1177/1475921707082309.
[12] Z. Cai. Vibration diagnostics of elastic shafts with a transverse crack. Master Thesis, Faculty of Computing, Health and Science, Edith Cowan University, Perth, Australia 2011.
[13] S.K. Singh and R. Tiwari. Detection and localization of multiple cracks in a shaft system: An experimental investigation. Measurement, 53:182–193, 2014. doi: 10.1016/j.measurement.2014.03.028.
[14] D. Southwick. Using full spectrum plots: Part 2. Orbit, 15(2):10–16. 1994.
[15] P. Goldman and A. Muszynska. Application of full spectrum to rotating machinery diagnostics. Orbit, 17–21, 1999.
[16] J. Tuma, and J. Bilos. Fluid induced instability of rotor systems with journal bearings. Engineering Mechanics, 14(1-2):69–80, 2007.
[17] T.H. Patel and A.K. Darpe. Application of full spectrum analysis for rotor fault diagnosis. In: IUTAM Symposium on Emerging Trends in Rotor Dynamics, 1011:535–545, 2011.
[18] C. Shravankumar and R. Tiwari. Detection of fatigue crack in a rotor system using full-spectrum based estimation. Sadhana, 41(2):239–251, 2016. doi: 10.1007/s12046-015-0452-9.
[19] C. Shravankumar and R. Tiwari. Model-based crack identification using full-spectrum. In Proceedings of the ASME 2013 Gas Turbine India Conference, Bangalore, Karnataka, India, December 5–6, 2013. doi: 10.1115/GTINDIA2013-3756.
[20] C. Shravankumar and R. Tiwari. Identification of stiffness and periodic breathing forces of a transverse switching crack in a Laval rotor. Fatigue and Fracture of Engineering Materials and Structures, 36(3):254–269, 2012. doi: 10.1111/j.1460-2695.2012.01718.x.
[21] C. Shravankumar, R. Tiwari, and A. Mahibalan. Experimental identification of rotor crack forces. In: Proceedings of the 9th IFToMM International Conference on Rotor Dynamics: pp. 361–371, 2015. doi: 10.1007/978-3-319-06590-8_28.
[22] X.B. Rao, Y.D. Chu, Y.X. Chang, J.G. Zhang, and Y.P. Tian. Dynamics of a cracked rotor system with oil-film force in parameter space. Nonlinear Dynamics, 88(4):2347–2357, 2017. doi: 10.1007/s11071-017-3381-9.
[23] B.C. Wen and Y.B.Wang. Theoretical research, calculation and experiments of cracked shaft dynamical responses. In Proceedings of International Conference on Vibration in Rotating Machinery, pp. 473–478, London, UK, 1988.
[24] Prashant Kumar. Elements of Fracture Mechanics. Wheeler Publishing, New Delhi, 1999.
[25] M.G. Maalouf. Slow-speed: vibration signal analysis. Orbit, 27(2):4–16, 2007.
[26] R. Tiwari. Rotor Systems: Analysis and Identification. CRC Press, USA, 2017. doi: 10.1201/9781315230962.
[27] L.G.G. Villani, S. da Siva, and A. Cunha Jr. Damage detection in uncertain nonlinear systems based on stochastic Volterra series. Mechanical Systems and Signal Processing, 125:288–310, 2019. doi: 10.1016/j.ymssp.2018.07.028.
Go to article

Authors and Affiliations

C. Shravankumar
1
Rajiv Tiwari
1

1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati – 781039, India.
Keywords:

Abstract

In times of rapidly progressing globalization, the possibility of fast long-distance travel between high traffic cities has become an extremely important issue. Currently, available transportation systems have numerous limitations, therefore, the idea of a high-speed transportation system moving in reduced-pressure conditions has emerged recently. This paper presents an approach to the modelling and simulation of the dynamic behaviour of a simplified high-speed vehicle that hovers over the track as a magnetically levitated system. The developed model is used for control system design. The purpose of passive and active suspension discussed in the text is to improve both the performance and stability of the vehicle as well as ride comfort of passengers travelling in a compartment. Comparative numerical studies are performed and the results of the simulations are reported in the paper with the intent to demonstrate the benefits of the approach employed here.

Go to article

Bibliography

[1] E. Musk. Hyperloop Alpha. Technical Report. Space Exploration Technologies Corporation, 2013.
[2] R.F. Post and D. Ryutov. The Inductrack: a new approach to magnetic levitation. Technical Report. Lawrence Livermore National Laboratory, USA, 1996. doi: 10.2172/237425.
[3] A.A. Shabana, K.E. Zaazaa, and H. Sugiyama. Railroad Vehicle Dynamics: A Computational Approach. CRC Press, 2007.
[4] Z. Liu, Z. Long, and X. Li. Maglev Trains. Key Underlying Technologies. Part of the Springer Tracts in Mechanical Engineering book series, Springer, 2015. doi: 10.1007/978-3-662-45673-6_1.
[5] Y. Cai, S.S. Chen, and D.M. Rote. Dynamics and controls in maglev systems. Technical Report, Argonne National Laboratory, USA, 1992. doi: 10.2172/10136539.
[6] P.K. Sinha. Electromagnetic Suspension Dynamics and Control. Peter Peregrinus Ltd., London, UK, 1987.
[7] M. Appleyard and P.E. Wellstead. Active suspensions: some background. IEE Proceedings – Control Theory and Applications, 142(2):123–128, 1995. doi: 10.1049/ip-cta:19951735.
[8] K.D. Rao. Modeling, simulation and control of semi active suspension system for automobiles under MATLAB Simulink using PID controller. IFAC Proceedings Volumes, 47(1):827–831, 2014. doi: 10.3182/20140313-3-IN-3024.00094.
[9] D. Hanafi. PID controller design for semi-active car suspension based on model from intelligent system identification. In: 2010 Second International Conference on Computer Engineering and Applications, volume 2, pages 60–63, Bali Island, Indonesia, 19-21 March 2010. doi: 10.1109/ICCEA.2010.168.
[10] M. Sentil Kumar. Development of active suspension system for automobiles using PID controller. Proceedings of the World Congress on Engineering 2008, volume II, pages 1472–1477, London, UK, 2-4 July, 2008.
[11] A.J. Truscott and P.E. Wellstead. Adaptive ride control in active suspension systems. Vehicle System Dynamics, 24(3):197–230, 1995. doi: 10.1080/00423119508969088.
[12] U.N.L.T. Alves, J.P.F. Garcia, M.C.M. Teixeira, S.C. Garcia, and F.B. Rodrigues. Sliding mode control for active suspension system with data acquisition delay. Mathematical Problems in Engineering, 2014:1-13, 2014. doi: 10.1155/2014/529293.
[13] Y. Cai, S.S. Chen, T.M. Mulcahy, and D.M. Rote. Dynamic stability of maglev systems. Technical Report, Argonne National Laboratory, USA, 1992. doi: 10.2172/10110331.
[14] R.M. Katz, V.D. Nene, R.J. Ravera, and C.A. Skalski. Performance of magnetic suspensions for high speed vehicles operating over flexible guideways. Journal of Dynamic Systems, Measurement, and Control, 96(2):204–212. doi: 10.1115/1.3426792.
[15] W. Kortüm, W. Schwartz, and I. Fayé. Dynamic modeling of high speed ground transportation vehicles for control design and performance evaluation. In: Schweitzer G., Mansour M. (eds), Dynamics of Controlled Mechanical Systems. Proceedings of IUTAM/IFAC Symposium, pages 335–350, Zurich, Switzerland, May 30–June 3, 1988. doi: 10.1007/978-3-642-83581-0_26.
[16] K.J. Aström and R.M. Murray. Feedback Systems: An Introduction for Scientists and Engineers. Princeton University Press, USA, 2008.
[17] P. Maciąg, P. Malczyk, and J. Frączek. Optimal design of multibody systems using the adjoint method. In: Awrejcewicz J. (ed.), Dynamical Systems in Applications, pages 240–253. Springer, 2018. doi: 10.1007/978-3-319-96601-4_22.
[18] Y. Zhu, C. Sandu, D. Dopico, and A. Sandu. Benchmarking of adjoint sensitivity-based optimization techniques using a vehicle ride case study. Mechanics Based Design of Structures and Machines, 46(2):254–266, 2018. doi: 10.1080/15397734.2017.1338576.
Go to article

Authors and Affiliations

Natalia Strawa
1
Paweł Malczyk
1

1. Institute of Aeronautics and Applied Mechanics, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Warsaw, Poland.
Keywords:

Abstract

The paper describes the dynamics of a composite cantilever beam with an active element. The vibrations of the kinematically excited beam are controlled with the use of a Macro Fiber Composite actuator. A proportional control algorithm is considered. During the analysis, actuator is powered by a time-varying voltage signal that is changed proportionally to the beam deflection. The MFC element control system with the implemented algorithm allowed for changing the stiffness of the tested structure. This is confirmed by the numerical and experimental results. Resonance curves for the beam with and without control are determined. The results show a very good agreement in qualitative terms.

Go to article

Bibliography

[1] R.B.Williams, G. Park, D.J. Inman, and W.K.Wilkie. An overview of composite actuators with piezoceramic fibers. In: Proceedings of 20th International Modal Analysis Conference, Los Angeles, CA, 4–7 February, 2002, SPIE – The International Society for Optical Engineering, 4753:421–427, 2002.
[2] B.W. Lacroix. On the mechanics, computational modeling and design implementation of piezoelectric actuators on micro air vehicles. Ph.D. Thesis, University of Florida, Gainesville, USA, 2013.
[3] T.A. Probst. Evaluating the Aerodynamic Performance of MFC-Actuated Morphing Wings to Control a Small UAV. Masters Thesis, Virginia Polytechnic Institute and State University, Blacksburg, USA, 2012.
[4] M. Borowiec, M. Bochenski, J. Gawryluk, and M. Augustyniak. Analysis of the macro fiber composite characteristics for energy harvesting efficiency. In: Awrejcewicz J., editor, Dynamical Systems: Theoretical and Experimental Analysis, vol. 182 of Springer Proceedings in Mathematics and Statistics Series, pages 27–37, 2016. doi: 10.1007/978-3-319-42408-8_3.
[5] J. Latalski. Modelling of macro fiber composite piezoelectric active elements in ABAQUS system. Eksploatacja i Niezawodność – Maintenance and Reliability, 52(4):72–78, 2011.
[6] A. Teter and J. Gawryluk. Experimental modal analysis of a rotor with active composite blades. Composite Structures, 153:451–467, 2016. doi: 10.1016/j.compstruct.2016.06.013.
[7] J. Gawryluk, A. Mitura, and A. Teter. Influence of the piezoelectric parameters on the dynamics of an active rotor. AIP Conference Proceedings, 1922(100010):1–8, 2018. doi: 10.1063/1.5019095.
[8] A. Mitura, J. Gawryluk, and A. Teter. Numerical and experimental studies on the rotating rotor with three active composite blades. Eksploatacja i Niezawodność – Maintenance and Reliability, 4(19):572–581, 2017. doi: 10.17531/ein.2017.4.11.
[9] J. Gawryluk, A. Mitura, and A. Teter. Dynamic response of a composite beam rotating at constant speed caused by harmonic excitation with MFC actuator. Composite Structures, 210:657–662, 2019. doi: 10.1016/j.compstruct.2018.11.083.
[10] M. Rafiee, F. Nitzsche, and M. Labrosse. Dynamics, vibration and control of rotating composite beams and blades: A critical review. Thin-Walled Structures, 119:795–819, 2017. doi: 10.1016/j.tws.2017.06.018.
[11] R. Alkhatib and M.F. Golnaraghi. Active structural vibration control: a review. The Shock and Vibration Digest, 35(5):367–383, 2003.
[12] P.P. Friedmann. On-blade control of rotor vibration, noise, and performance: just around the corner? Journal of the American Helicopter Society, 59(4):1–37, 2014. doi: 10.4050/JAHS.59.041001.
[13] J.X. Gao and W.H. Liao. Vibration analysis of simply supported beams with enhanced selfsensing active constrained layer damping treatments. Journal of Sound and Vibration, 280(1-2):329–357, 2005. doi: 10.1016/j.jsv.2003.12.019.
[14] J.C. Lin and M.H. Nien. Adaptive control of a composite cantilever beam with piezoelectric damping-modal actuators/sensors. Composite Structures, 70(2):170–176, 2005. doi: 10.1016/j.compstruct.2004.08.020.
[15] H.A. Sodano. Macro-Fiber Composites for Sensing, Actuation and Power Generation. Masters Thesis, Virginia Polytechnic Institute and State University, Blacksburg, USA, 2003.
Go to article

Authors and Affiliations

Jarosław Gawryluk
1
Andrzej Mitura
1
Andrzej Teter
1

1. Department of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Lublin, Poland.

Instructions for authors

Archive of Mechanical Engineering is an international journal publishing works of wide significance, originality and relevance in most branches of mechanical engineering. The journal is peer-reviewed and is published both in electronic and printed form. Archive of Mechanical Engineering publishes original papers which have not been previously published in other journal, and are not being prepared for publication elsewhere. The publisher will not be held legally responsible should there be any claims for compensation. The journal accepts papers in English.

Archive of Mechanical Engineering is an Open Access journal. The journal does not have article processing charges (APCs) nor article submission charges.

Outline of procedures
• To ensure that high scientific standards are met, the editorial office of Archive of Mechanical Engineering implements anti-ghost writing and guest authorship policy. Ghostwriting and guest authorship are indication of scientific dishonesty and all cases will be exposed: editorial office will inform adequate institutions (employers, scientific societies, scientific editors associations, etc.).
• To maintain high quality of published papers, the editorial office of Archive of Mechanical Engineering applies reviewing procedure. Each manuscript undergoes crosscheck plagiarism screening. Each manuscript is reviewed by at least two independent reviewers.
• Before publication of the paper, authors are obliged to send scanned copies of the signed originals of the declaration concerning ghostwriting, guest authorship and authors contribution and of the Open Access license.
Submission of manuscripts

The manuscripts must be written in one of the following formats:
• TeX, LaTeX, AMSTeX, AMSLaTeX (recommended),
• MS Word, either as standard DOCUMENT (.doc, .docx) or RICH TEXT FORMAT (.rtf).

If you experience difficulties with the manuscript submission website, please contact the Assistant to the Editor of the AME (ame.eo@meil.pw.edu.pl).

All authors of the manuscript are responsible for its content; they must have agreed to its publication and have given the corresponding author the authority to act on their behalf in all matters pertaining to publication. The corresponding author is responsible for informing the co-authors of the manuscript status throughout the submission, review, and production process.

Length and arrangement

Papers (including tables and figures) should not exceed in length 25 pages of size 12.6 cm x 19.5 cm (printing area) with a font size of 11 pt. For manuscript preparation, the Authors should use the templates for Word or LaTeX available at the journal webpage. Please notice that the final layout of the article will be prepared by the journal's technical staff in LaTeX. Articles should be organized into the following sections:
• List of keywords (separated by commas),
• Full Name(s) of Author(s), Affiliation(s), Corresponding Author e-mail address,
• Title,
• Abstract,
• Main text,
• Appendix,
• Acknowledgments (if applicable),
• References.
Affiliations should include department, university, city and country. ORCID identifiers of all Authors should be added.
We suggest the title should be as short as possible but still informative.

An abstract should accompany every article. It should be a brief summary of significant results of the paper and give concise information about the content of the core idea of the paper. It should be informative and not only present the general scope of the paper, but also indicate the main results and conclusions. An abstract should not exceed 200 words.

Please follow the general rules for writing the main text of the paper:
• use simple and declarative sentences, avoid long sentences, in which the meaning may be lost by complicated construction,
• divide the main text into sections and subsections (if needed the subsections may be divided into paragraphs),
• be concise, avoid idle words,
• make your argumentation complete; use commonly understood terms; define all nonstandard symbols and abbreviations when you introduce them;
• explain all acronyms and abbreviations when they first appear in the text;
• use all units consistently throughout the article;
• be self-critical as you review your drafts.
The authors are advised to use the SI system of units.

Artwork/Equations/Tables

You may use line diagrams and photographs to illustrate theses from your text. The figures should be clear, easy to read and of good quality (300 dpi). The figures are preferred in a vector format (bitmap formats are acceptable, but not recommended). The size of the figures should be adequate to their contents. Use 8-9pt font size of the text within the figures.

You should use tables only to improve conciseness or where the information cannot be given satisfactorily in other ways. Tables should be numbered consecutively and referred to within the text by numbers. Each table should have an explanatory caption which should be as concise as possible. The figures and tables should be inserted in the text file, where they are mentioned.

Displayed equations should be numbered consecutively using Arabic numbers in parentheses. They should be centered, leaving a small space above and below to separate it from the surrounding text.

Footnotes/Endnotes/Acknowledgements

We encourage authors to restrict the use of footnotes. Information concerning research grant support should appear in a separate Acknowledgements section at the end of the paper. Acknowledgements of the assistance of colleagues or similar notes of appreciation should also appear in the Acknowledgements section.

References
References should be numbered and listed in the order that they appear in the text. References indicated by numerals in square brackets should complete the paper in the following style:

Books:
[1] R.O. Author. Title of the Book in Italics. Publisher, City, 2018.

Articles in Journals:
[2] D.F. Author, B.D. Second Author, and P.C. Third Author. Title of the article. Full Name of the Journal in Italics, 52(4):89–96, 2017. doi: 1234565/3554. (where means: 52 – volume; 4 – number or issue; 89–96 – pages, and 1234565/3554 – doi number (if exists).)

Theses:
[3] W. Author. Title of the thesis. Ph.D. Thesis, University, City, Country, 2010.

Conference Proceedings:
[4] H. Author. Title of the paper. In Proc. Conference Name in Italics, pages 001–005, Conference Place, 10-15 Jan. 2015. doi: 98765432/7654vd.

English language

Archive of Mechanical Engineering is published in English. Make sure that your manuscript is clearly and grammatically written. The content should be understandable and should not cause any confusion to the readers, including the reviewers. After accepting the manuscript for a publication in the AME, we offer a free language check service, for correcting small language mistakes.

Submission of Revised Articles

When revision of a manuscript is requested, authors are expected to deliver the revised version of the manuscript as soon as possible. The manuscript should be uploaded directly to the Editorial System as an answer to the Editor's decision, and not as a new manuscript. If it is the 1st revision, the authors are expected to return revised manuscript within 60 days; if it is the 2nd revision, the authors are expected to return revised manuscript within 14 days. Additional time for resubmission must be requested in advance. If the above mentioned deadlines are not met, the manuscript may be treated as a new submission.

Outline of the Production Process

Once an article has been accepted for publication, the manuscript is transferred into our production system to be language-edited and formatted. Language/technical editors reserve the privilege of editing manuscripts to conform with the stylistic conventions of the journal. Once the article has been typeset, PDF proofs are generated so that authors can approve all editing and layout.

Reviewers

The Editorial Board of the Archive of Mechanical Engineering (AME) sincerely expresses gratitude to the following individuals who devoted their time to review papers submitted to the journal. Particularly, we express our gratitude to those who reviewed papers several times.

List of reviewers of volume 68 (2021)
Ahmad ABDALLA – Huaiyin Institute of Technology, China
Sara ABDELSALAM – University of California, Riverside, United States
Muhammad Ilman Hakimi Chua ABDULLAH – Universiti Teknikal Malaysia Melaka, Malaysia
Hafiz Malik Naqash AFZAL – University of New South Wales, Sydney, Australia
Reza ANSARI – University of Guilan, Rasht, Iran
Jeewan C. ATWAL – Indian Institute of Technology Delhi, New Delhi, India
Sakthi BALAN – K. Ramakrishnan college of Engineering, Trichy, India
Leszek BARANOWSKI – Military University of Technology, Warsaw, Poland
Elias BRASSITOS – Lebanese American University, Byblos, Lebanon
Tadeusz BURCZYŃSKI – Institute of Fundamental Technological Research, Warsaw, Poland
Nguyen Duy CHINH – Hung Yen University of Technology and Education, Hung Yen, Vietnam
Dorota CHWIEDUK – Warsaw University of Technology, Poland
Adam CISZKIEWICZ – Cracow University of Technology, Poland
Meera CS – University of Petroleum and Energy Studies, Duhradun, India
Piotr CYKLIS – Cracow University of Technology, Poland
Abanti DATTA – Indian Institute of Engineering Science and Technology, Shibpur, India
Piotr DEUSZKIEWICZ – Warsaw University of Technology, Poland
Dinesh DHANDE – AISSMS College of Engineering, Pune, India
Sufen DONG – Dalian University of Technology, China
N. Godwin Raja EBENEZER – Loyola-ICAM College of Engineering and Technology, Chennai, India
Halina EGNER – Cracow University of Technology, Poland
Fehim FINDIK – Sakarya University of Applied Sciences, Turkey
Artur GANCZARSKI – Cracow University of Technology, Poland
Peng GAO – Northeastern University, Shenyang, China
Rafał GOŁĘBSKI – Czestochowa University of Technology, Poland
Andrzej GRZEBIELEC – Warsaw University of Technology, Poland
Ngoc San HA – Curtin University, Perth, Australia
Mehmet HASKUL – University of Sirnak, Turkey
Michal HATALA – Technical University of Košice, Slovak Republic
Dewey HODGES – Georgia Institute of Technology, Atlanta, United States
Hamed HONARI – Johns Hopkins University, Baltimore, United States
Olga IWASINSKA – Warsaw University of Technology, Poland
Emmanuelle JACQUET – University of Franche-Comté, Besançon, France
Maciej JAWORSKI – Warsaw University of Technology, Poland
Xiaoling JIN – Zhejiang University, Hangzhou, China
Halil Burak KAYBAL – Amasya University, Turkey
Vladis KOSSE – Queensland University of Technology, Brisbane, Australia
Krzysztof KUBRYŃSKI – Air Force Institute of Technology, Warsaw, Poland
Waldemar KUCZYŃSKI – Koszalin University of Technology, Poland
Igor KURYTNIK – State Higher School in Oswiecim, Poland
Daniel LESNIC – University of Leeds, United Kingdom
Witold LEWANDOWSKI – Gdańsk University of Technology, Poland
Guolu LI – Hebei University of Technology, Tianjin, China
Jun LI – Xi’an Jiaotong University, China
Baiquan LIN – China University of Mining and Technology, Xuzhou, China
Dawei LIU – Yanshan University, Qinhuangdao, China
Luis Norberto LÓPEZ DE LACALLE – University of the Basque Country, Bilbao, Spain
Ming LUO – Northwestern Polytechnical University, Xi’an, China
Xin MA – Shandong University, Jinan, China
Najmuldeen Yousif MAHMOOD – University of Technology, Baghdad, Iraq
Arun Kumar MAJUMDER – Indian Institute of Technology, Kharagpur, India
Paweł MALCZYK – Warsaw University of Technology, Poland
Miloš MATEJIĆ – University of Kragujevac, Serbia
Norkhairunnisa MAZLAN – Universiti Putra Malaysia, Serdang, Malaysia
Dariusz MAZURKIEWICZ – Lublin University of Technology, Poland
Florin MINGIREANU – Romanian Space Agency, Bucharest, Romania
Vladimir MITYUSHEV – Pedagogical University of Cracow, Poland
Adis MUMINOVIC – University of Sarajevo, Bosnia and Herzegovina
Baraka Olivier MUSHAGE – Université Libre des Pays des Grands Lacs, Goma, Congo (DRC)
Tomasz MUSZYŃSKI – Gdansk University of Technology, Poland
Mohamed NASR – National Research Centre, Giza, Egypt
Driss NEHARI – University of Ain Temouchent, Algeria
Oleksii NOSKO – Bialystok University of Technology, Poland
Grzegorz NOWAK – Silesian University of Technology, Gliwice, Poland
Iwona NOWAK – Silesian University of Technology, Gliwice, Poland
Samy ORABY – Pharos University in Alexandria, Egypt
Marcin PĘKAL – Warsaw University of Technology, Poland
Bo PENG – University of Huddersfield, United Kingdom
Janusz PIECHNA – Warsaw University of Technology, Poland
Maciej PIKULIŃSKI – Warsaw University of Technology, Poland
T.V.V.L.N. RAO – The LNM Institute of Information Technology, Jaipur, India
Andrzej RUSIN – Silesian University of Technology, Gliwice, Poland
Artur RUSOWICZ – Warsaw University of Technology, Poland
Benjamin SCHLEICH – Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
Jerzy SĘK – Lodz University of Technology, Poland
Reza SERAJIAN – University of California, Merced, USA
Artem SHAKLEIN – Udmurt Federal Research Center, Izhevsk, Russia
G.L. SHI – Guangxi University of Science and Technology, Liuzhou, China
Muhammad Faheem SIDDIQUI – Vrije University, Brussels, Belgium
Jarosław SMOCZEK – AGH University of Science and Technology, Cracow, Poland
Josip STJEPANDIC – PROSTEP AG, Darmstadt, Germany
Pavel A. STRIZHAK – Tomsk Polytechnic University, Russia
Vadym STUPNYTSKYY – Lviv Polytechnic National University, Ukraine
Miklós SZAKÁLL – Johannes Gutenberg-Universität Mainz, Germany
Agnieszka TOMASZEWSKA – Gdansk University of Technology, Poland
Artur TYLISZCZAK – Czestochowa University of Technology, Poland
Aneta USTRZYCKA – Institute of Fundamental Technological Research, Warsaw, Poland
Alper UYSAL – Yildiz Technical University, Turkey
Gabriel WĘCEL – Silesian University of Technology, Gliwice, Poland
Marek WĘGLOWSKI – Welding Institute, Gliwice, Poland
Frank WILL – Technische Universität Dresden, Germany
Michał WODTKE – Gdańsk University of Technology, Poland
Marek WOJTYRA – Warsaw University of Technology, Poland
Włodzimierz WRÓBLEWSKI – Silesian University of Technology, Gliwice, Poland
Hongtao WU – Nanjing University of Aeronautics and Astronautics, China
Jinyang XU – Shanghai Jiao Tong University, China
Zhiwu XU – Harbin Institute of Technology, China
Zbigniew ZAPAŁOWICZ – West Pomeranian University of Technology, Szczecin, Poland
Zdzislaw ZATORSKI – Polish Naval Academy, Gdynia, Poland
Wanming ZHAI – Southwest Jiaotong University, Chengdu, China
Xin ZHANG – Wenzhou University of Technology, China
Su ZHAO – Ningbo Institute of Materials Technology and Engineering, China