NONLINEAR BEHAVIOR OF THE CONSTITUTIVE SIMULATION OF MESO-SCOPIC COMPUTATIONAL MECHANICS FOR THREE-DIMENSIONAL MULTI-DIRECTIONAL BRAIDED COMPOSITES
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摘要: 针对三维多向编织复合材料, 在已建立的单胞几何模型及材料力学性能细观计算力学分析方法的基础上,引入M urakam i 的几何损伤理论模拟纤维束的细观损伤行为, 建立了预报该类材料非线性本构行为数值模拟及细观损伤机理的有限元分析方法。结合实例预报了碳/环氧四向编织复合材料本构的非线性行为, 并与实验结果进行了对比。Abstract: Based on the geometric model of a unit cell and meso scopic computational mechanics, the present paper predicts the nonlinear behavior of constitutive relation for three dimensional multi directional braided composites. Meso scopic damage behavior is simulated by introducing Murakami's damage theory and using finite element method. Numerical examples are given and compared with experimental results. to demonstrate the nonlinear constitutive relation of four directional braided carbon/epoxy composites.
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