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摘要
This work deals with numerical simulation of the metal matrix composites (MMCs) microstructures mechanical behavior using a proposed computational homogenization modeling based on multi-scale approach. In the microstructure, elastic inclusions are considered and the matrix mechanical behavior is governed by a von Mises model with isotropic strain hardening. Besides, a cohesive fracture and contact model is developed in order to simulate the debonding phase in the matrix/inclusion interface. The study is based on the concept of Representative Volume Element (RVE), in which can be used constitutive models that take into account the dissipative phenomena of cracking and plasticity. A set of RVEs composed of different distributions of elastic inclusions and submitted to different kinematical restrictions are analyzed. Moreover, the parametric sensibility of the cohesive fracture model and the debonding interface relevance in the rupture processes of the microstructure are observed. In general, the results contribute to the discussion about the use of simple constitutive models, in their formulation and parametric identification, for modeling of the heterogeneous materials microstructures, leading to accurate qualitative results related to the macroscopic behavior.
- 出版日期2016-9
