Damage Formulation of Random Particulate Composites by Combined Micromechanics and Damage Mechanics
Damage Formulation of Random Particulate Composites by Combined Micromechanics and Damage Mechanics
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结合微观力学和损伤力学的随机颗粒复合材料损伤公式
DOI：
10.1299/kikaia.69.846
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
S. Motogi
中科院分区：
文献类型：
--
作者：
A. Wada;S. Motogi
随机颗粒复合材料的损伤演化是由细观力学和损伤力学两种不同的理论相结合而形成的。损伤力学被应用到填料颗粒来描述界面脱粘，这反过来又纳入Mori-Tanaka的平均场理论损伤复合材料的刚度预测。该模型使用能量平衡的概念来解释由于颗粒脱粘引起的非线性行为。利用该模型，分析了颗粒体积分数、尺寸分布和界面强度对复合材料损伤发展的影响。重点也放在部分脱粘损伤诱导各向异性起主导作用的效果。结果表明，该模型不仅能再现材料的应力应变关系，而且能再现材料损伤过程中泊松比的变化。
Damage evolution of random particulate composites is formulated by the combination of two distinct theories, micromechanics and damage mechanics. Damage mechanics is applied to filler particles to describe interfacial debonding, which in turn incorporated into Mori-Tanaka's mean field theory for stiffness prediction of damaged composites. The model uses an energy balance concept to account for nonlinear behavior due to particle debonding. With this model, the effects of particle volume fraction, size distribution and interfacial strength on damage development of composites are analytically investigated. Emphasis is also placed on the effect of partial debonding which plays a dominant role for damage induced anisotropy. It is found that the model can reproduce not only stress-strain relationship but also variation in Poisson's ratio observed in damage process.