Homogenized Elastic-Viscoplastic Behavior of Anisotropic Open-Porous Bodies

Abstract:

This lecture presents constitutive modeling of the homogenized elastic-viscoplastic behavior of pore-pressurized anisotropic open-porous bodies. The base solids are assumed to be metallic materials at small strains and rotations. First, by describing micro-macro relations relevant to periodic unit cells of anisotropic open-porous bodies with pore pressure, constitutive features are discussed for the viscoplastic macrostrain rate in steady states. Second, on the basis of the constitutive features found, the viscoplastic macrostrain rate is represented as an anisotropic function of Terzaghi’s effective stress. Third, the resulting viscoplastic equation is used to simulate the homogenized elastic-viscoplastic behavior of an ultrafine plate-fin structure and a thick perforated plate subjected to macroscopic loading in the absence and presence of pore pressure. The corresponding FE homogenization analysis is performed for comparison to validate the developed viscoplastic equation.

• Periodical: Key Engineering Materials (Volumes 535-536)
• Pages: 12-17
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.535-536.12
• Online since: January 2013
• Authors: Nobutada Ohno
• Keywords: Anisotropy, Constitutive Modeling, Homogenized Behavior, Open-Porous Body, Pore Pressure, Viscoplasticity

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