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1.研究断裂物理的必要性断裂力学在工程界受到广泛的重视并取得了可喜的成果。在运用之余,人们常常会问:断裂力学中所采用的K_(Ic),J_(Ic),COD这些新的应用力学参量与材料的微观结构(组织、位错、夹杂形态)有什么内在的联系?怎样从材料的组织特征来计算它的强度和韧性,并以此来指导材料的成分配比和生产工艺使它的性能有
1. The need to study fracture physics Fracture mechanics in the engineering community has been widely valued and achieved gratifying results. In addition to the application, people often ask: What are the inherent new mechanical parameters and material microstructure (structure, dislocation and inclusion) of K_ (Ic), J_ (Ic) and COD used in fracture mechanics? How to calculate the strength and toughness of the material from the organizational characteristics and to guide the material composition ratio and production process to make it performance