Open Access

ABSTRACT

Elastic-plastic constitutive equation taking account of particle size

S. Takashima¹, N. Miyazaki², T. Ikeda³, M. Nakagaki⁴

1 Graduate student, Kyoto Univ., Japan
2 Professor, Kyoto Univ., Japan
3 Associate Professor, Kyoto Univ., Japan
4 Trustee, Kyushu Inst. of Tech., Japan

The International Conference on Computational & Experimental Engineering and Sciences 2007, 4(4), 215-222. https://doi.org/10.3970/icces.2007.004.215

Abstract

Composite materials have complicated microstructures. These structures affect macroscopic deformation. In this study, we focus on the particle size effect in composite materials. For this purpose, we derived an elastic-plastic constitutive equation considering size effect by using Eshelby's theory and the strain gradient theory of plasticity. We performed a homogenized finite element analysis using the elastic-plastic constitutive equation. The results obtained from the analysis show increase of the strength with decrease of the particle size in composite materials.

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