【摘要】 从细观力学角度出发,运用均匀化方法分析了韧性复合材料在交变载荷作用下的塑性行为。从反映复合材料细观结构的代表性胞元入手,将均匀化理论运用到塑性安定下限分析中,计算复合材料的承载能力,利用温度参数法构造了自平衡应力场,其安定下限分析的有限元格式最终归结为一个约束非线性规划问题并采用序列二次规划方法求解。该方法为研究具有周期性微结构特点的韧性复合材料的宏观塑性行为提供了一种更实际有效的方法。更多还原

【Abstract】 The bearing capacity of ductile composites was analyzed for variable loadings by using homogenization theory from micromechanics for the macroscopic plastic analysis. The composite microstructure is represented using a representative volume element. The limit load of a microstructure volume element is calculated by introducing homogenization theory into the static shakedown analysis. The static shakedown approach is solved using the finite element method as a constrained nonlinear programming problem which is then solved using the Sequential Quadratic Programming method. This method is more efficient, especially for studing of the macroscopic plasticity properties of periodical ductile composites.更多还原