A finite-strain model for anisotropic viscoplastic porous media: I – Theory
作者： K. Danas , P. Ponte Castañeda
DOI: 10.1016/J.EUROMECHSOL.2008.11.002
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摘要: In this work, we propose an approximate homogenization-based constitutive model for estimating the effective response and associated microstructure evolution in viscoplastic (including ideally-plastic) porous media subjected to finite-strain loading conditions. The proposed is based on "second-order" nonlinear homogenization method, constructed such a way as reproduce exactly behavior of "composite-sphere assemblage" limit hydrostatic isotropic microstructure. However, designed hold completely general three-dimensional conditions, leading deformation-induced anisotropy, whose development time handled through laws internal variables characterizing instantaneous "ellipsoidal" state Part II study, results will be given several representative conditions microstructural configurations.
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