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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。
From the perspective of mesomechanics, the plastic behavior of ductile composites under alternating load was analyzed using the homogenization method. Starting from the representative cell that reflects the meso-structure of composite material, the homogenization theory is applied to the lower limit analysis of plastic stability, the bearing capacity of composite material is calculated, and the self-equilibrium stress field is constructed by the temperature parameter method. The limited stability analysis limit The meta-format finally comes down to a constrained nonlinear programming problem and solved by the sequence quadratic programming method. This method provides a more practical and effective method for studying the macroscopic plastic behavior of ductile composites with periodic microstructures.