OS0914 Homogenized Elastic-Viscoplastic Behavior of Open Porous Bodies With Two Pore Pressures

DOI Web Site
  • NARITA Kohei
    Department of Computational Science and Engineering, Nagoya University
  • OHNO Nobutada
    名古屋大学大学院工学研究科
  • Okumura Dai
    Department of Computational Science and Engineering, Nagoya University

Bibliographic Information

Other Title
  • OS0914 内圧差を有するオープンポーラス構造体の弾粘塑性均質化解析

Abstract

We study the homogenized elastic-viscoplastic behavior of anisotropic open-porous bodies subjected to two pore pressures, p_1 and p_2. The open-porous bodies considered are assumed to be periodic and composed of metallic materials. Hill's macrohomogeneity equation is used to show three special cases in which one of p_1 p_2 or p_m (the mean of p_1 and p_2) entirely affects the homogenized viscoplastic behavior in the steady state. To verify the thiee special cases, we perform FE homogenization analysis of an ultrafine plate-fin structure subjected to p_1 and p_2, for which two base metals with different strain-rate sensitivities are considered. It is demonstrated that the three special cases typically occur under uniaxial tension and compression in the stacking direction, depending on the strain-rate sensitivity of the base metals. It is further shown that a macromatenal model reproduces well the homogenized stress-strain relations attained in the FE homogenized analysis if p_1, p_2 or p_m is entered for Terzagi's effective stress in the viscoplastic equation in the macromatenal model.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top