Computational homogenization of elasto-plastic porous metals

摘要: Abstract The effective material response of ductile metals containing spherical pores at volume fractions between 0.1% and 30% is investigated on a computational basis. Periodic hard core models voids are used in Monte Carlo type finite element study. objective the study investigation pressure dependency deviatoric limit stress three-dimensional microstructures. In order to characterize underlying morphology, statistical properties unit cells evaluated. representativeness results investigated. With respect local response, inelastic deformations within cell analyzed compared for different types boundary conditions. related existing analytical an extension Gurson–Tvergaard–Needleman model proposed overcome observed discrepancies. new has only one additional parameter, found efficiently predict all examined porosities.