TY - JOUR N2 - The subject of the study are alumina foams produced by gelcasting method. The results of micro-computed tomography of the foam samples are used to create the numerical model reconstructing the real structure of the foam skeleton as well as the simplified periodic open-cell structure models. The aim of the paper is to present a new idea of the energy-based assessment of failure strength under uniaxial compression of real alumina foams of various porosity with use of the periodic structure model of the same porosity. Considering two kinds of cellular structures: the periodic one, for instance of fcc type, and the random structure of real alumina foam it is possible to justify the hypothesis, computationally and experimentally, that the same elastic energy density cumulated in the both structures of the same porosity allows to determine the close values of fracture strength under compression. Application of finite element computations for the analysis of deformation and failure processes in real ceramic foams is time consuming. Therefore, the use of simplified periodic cell structure models for the assessment of elastic moduli and failure strength appears very attractive from the point of view of practical applications. L1 - http://journals.pan.pl/Content/109163/PDF/AMM-2018-4-44-Nowak.pdf L2 - http://journals.pan.pl/Content/109163 PY - 2018 IS - No 4 EP - 1908 DO - 10.24425/amm.2018.125122 KW - periodic cell structure KW - alumina open-cell foam KW - Young modulus KW - strength of alumina foams KW - Burzyński limit criterion A1 - Nowak, M. A1 - Nowak, Z. A1 - Pęcherski, R.B. A1 - Potoczek, M. A1 - Śliwa, R.E. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.12.12 T1 - Assessment of Failure Strength of Real Alumina Foams with Use of the Periodic Structure Model SP - 1903 UR - http://journals.pan.pl/dlibra/publication/edition/109163 T2 - Archives of Metallurgy and Materials ER -