断裂力学应用弹性力学和弹塑性力学理论推导出表征裂纹尖端应力场特性的力学参量(其中最主要的是应力场强度因子K);同时提出了表征材料抵抗裂纹失稳扩展能力的机械性能指标(如断裂韧性K_(1c)),从而建立了新的断裂判据,为工程设计提供了新的设计方法。 就目前发展的状况来看,线弹性断裂力学不论是在理论上,还是在测试技术上都已 Fracture Mechanics The mechanical parameters that characterize the stress field at the crack tip (the most important of which are the stress field strength factor K) are derived from the theories of elasticity and elasto-plastic mechanics. Mechanical properties of the material against crack instability are also presented Such as fracture toughness K_ (1c)), thus establishing a new fracture criterion, which provides a new design method for engineering design. In terms of the current development situation, the linear elastic fracture mechanics is both in theory and in testing technology