机械构件在运行过程中常常发生断裂失效现象,从而造成不同程度的损失,尤其是低应力脆性断裂失效、应力腐蚀断裂失效等,突然断裂失效所造成的损失就更大,因此,断裂是最危险的失效类型。断口分析是断裂失效分析的基础。在断裂失效过程中,机械构件一般都要断裂成两块或两块以上,即形成断口,即使是不完全断裂的机械构件也要用人工 Mechanical components often occur in the process of fracture failure, resulting in varying degrees of loss, especially low-stress brittle fracture failure, stress corrosion cracking failure, the sudden failure caused by failure is even greater, therefore, the most dangerous fracture The type of failure. Fracture analysis is the basis of fracture failure analysis. In the failure process, the mechanical components are generally broken into two or more, that is, the formation of fracture, even if not completely broken mechanical components also need to use artificial