材料科学
复合材料
金属基复合材料
粒子(生态学)
应变硬化指数
基质(化学分析)
复合数
硬化(计算)
压缩(物理)
有限元法
代表性基本卷
流动应力
应变率
热力学
微观结构
物理
图层(电子)
海洋学
地质学
作者
András Borbély,Horst Biermann,O. Hartmann
标识
DOI:10.1016/s0921-5093(01)01144-3
摘要
A multi-particle 2D finite element model of a 20% particulate reinforced metal-matrix composite was developed on a statistical basis taking into account the correlations between the position, size and orientation of the ceramic particles in the matrix. The stress–strain curves in tension and compression given by the clustered multi-particle model are compared with the curves obtained from one-particle unit cell simulations. It is shown that clustering of particles increases the plastic strain accumulated in the matrix leading to a higher strain hardening and thus to a higher flow stress. The size of the representative volume element (RVE) should be at least equal to the correlation length of the geometrically relevant correlation functions, which was ∼2.4 times larger than the average interparticle distance for the experimentally studied case. Reasonable agreement is obtained between computed residual strains and data available in the literature.
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