کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
775154 1463232 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A finite-strain model for anisotropic viscoplastic porous media: I – Theory
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
A finite-strain model for anisotropic viscoplastic porous media: I – Theory
چکیده انگلیسی

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 model is based on the “second-order” nonlinear homogenization method, and is constructed in such a way as to reproduce exactly the behavior of a “composite-sphere assemblage” in the limit of hydrostatic loading and isotropic microstructure. However, the model is designed to hold for completely general three-dimensional loading conditions, leading to deformation-induced anisotropy, whose development in time is handled through evolution laws for the internal variables characterizing the instantaneous “ellipsoidal” state of the microstructure. In Part II of this study, results will be given for the instantaneous response and microstructure evolution in porous media for several representative loading conditions and microstructural configurations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - A/Solids - Volume 28, Issue 3, May–June 2009, Pages 387–401
نویسندگان
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