Journal
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
Volume 49, Issue -, Pages 137-145Publisher
GAUTHIER-VILLARS/EDITIONS ELSEVIER
DOI: 10.1016/j.euromechsol.2014.07.001
Keywords
Random porous media; Computational homogenization; Representativity
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A computational homogenization study of three-dimensional cubic cells is presented to estimate the overall yield surface of random porous media covering a wide range of stress triaxiality ratios. The representativity of the overall yield surface estimates is examined using cubic cells containing randomly distributed and oriented voids with different volume fractions and shapes (spherical and oblate/prolate). The computational results are compared with some existing Gurson-type yield criteria. The extension of the Gurson-Tvergaard model recently proposed by Fritzen et al. (2012) for spherical cavities is shown in good agreement with the computational results for all investigated porosities. (C) 2014 Elsevier Masson SAS. All rights reserved.
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