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前言断裂力学是固体力学的一个新分支。主要任务是研究有裂纹状缺陷的材料和结构在各种应力状态、温度和介质条件下的力学行为,提出描述裂纹尖端区域力学状态的参量,并建立断裂准则。因而对于工程结构的安全经济设计、断裂的控制和防止,具有重大的指导意义。断裂力学的基本理论按其研究对象特性分,有线弹性断裂力学和弹塑性断裂力学;按载荷性质分,有静态断裂力学和动态断裂力
Foreword Fracture mechanics is a new branch of solid mechanics. The main task is to study the mechanical behavior of cracked materials and structures under various stress conditions, temperatures and media conditions. The parameters describing the mechanical state in the crack tip region are proposed and the fracture criterion is established. Therefore, it has great guiding significance for the safety and economic design of engineering structures and the control and prevention of faults. The basic theory of fracture mechanics according to the characteristics of their research points, linear elastic fracture mechanics and elastoplastic fracture mechanics; according to the nature of the load, with static fracture mechanics and dynamic fracture force