Failure of bolt is due to original crack brought on manufacture, both stress concentration of original crack tip and corrosion condition of the open air caused the stress corrosion cracking of bolt. 螺栓断裂失效是由于在螺栓根部存在因加工不当产生的初始裂纹,在初始裂纹尖端的应力集中和露天使用环境中水介质的共同作用下,螺栓发生应力腐蚀开裂。
Effect of Stress Ratio and Loading Frequency on Crack Growth Rate of Corrosion Fatigue 加载频率f和应力比R对腐蚀疲劳裂纹扩展速率影响的研究
Stress Corrosion Crack ( SCC ) is the most dangerous local corrosion type to high-strength aluminium alloy structure. 应力腐蚀开裂是对高强铝合金构件安全性危害最大的一种局部腐蚀破坏形态。
For fracture rock, the fracture stress will be reduced and the crack length will increase under the chemical corrosion. 对于裂隙岩体来说,化学溶液的腐蚀则主要体现在断裂应力的减小和裂隙的增大。
It makes use of the laser shock energy to improve the surface properties of materials, and induces residual compressive stress, so as to reduce the probability of fatigue crack source and increase resistance to stress corrosion cracking, and to extend the service life of working parts. 激光冲击处理能使零件材料表面性能得到改善,并产生有利的残余压应力,降低生成疲劳裂纹源的几率和增加应力腐蚀抗力,从而延长零件的服役寿命。