确定复合材料宏观屈服准则的细观力学方法

A MICROMECHANICAL METHOD FOR DETERMINING THE MACROSCOPIC YIELD CRITERION OF COMPOSITES

运用细观力学中的均匀化方法 ,分析了含周期性微结构复合材料的宏观屈服准则 ,并对Hill Tsai准则进行了修正 .从基于复合材料细观结构的代表性胞元入手 ,运用塑性极限理论中的机动分析以及有限元方法 ,计算了细观结构的极限载荷域 .通过宏细观尺度对应关系 ,得到复合材料的宏观屈服准则 .

The yield criterion of composite materials with periodic microstructures is simulated by using the homogenization method of micromechanics together with the plastic limit analysis theory. The Hill Tsai criterion is modified. The microstructures of composite materials are considered by choosing a representative volume element. The limit load domain of the microstructure can be numerically calculated from the upper bound method of plastic limit analysis and the finite element method. According to the relation between macroscopic and microscopic scales, the macroscopic failure criterion of composites is determined.