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应用宏、微观相结合的分析观点，在概率计算几何方法基础上构造材料微结构的几何网络，均匀随机投放各晶粒的材料主轴方向，从而形成计算微观力学分析模型。用多域弹塑性边界元方法计算材料微结构的循环应力应变响应，对多晶体的循环硬化量、循环屈服应力增量、Ｂａｕｓｃｈｉｎｇｅｒ效应进行数值统计分析，获得了其变化规律。这对于研究工程机械中承力构件在循环载荷作用下的屈服特征、形变软硬化规律以及循环损伤有着积极意义。
According to the analysis point of view of macro and micro, a geometrical network of material microstructures is constructed on the basis of probabilistic calculation geometric method, and the direction of material principal axis of each grain is randomly and uniformly distributed so as to form a microscopic mechanical analysis model. The multi-domain elastic-plastic boundary element method is used to calculate the cyclic stress and strain response of the microstructure of the material, and the numerical simulation of cyclic hardening, cyclic increment of yield stress and Bauschinger effect is carried out. It is of great significance to study the yield characteristics, the law of softening and deforming, and the cyclic damage of bearing members in construction machinery under cyclic loading.