Under the action of tensile stress and tensile stress, the bolt with relatively low strength will crack first, and then the fatigue fracture will occur.
在拉应力和应拉力交替的作用下，强度相对较低的螺栓会先产生裂纹，进而发生疲劳断裂。
The effect of proof testing on the fatigue strength of ceramic specimens is analyzed by means of the fracture mechanics approach.
应用断裂力学理论分析了保证试验对陶瓷试件造成的损伤及其对疲劳强度的影响。
The results indicate that the low strength and hardness, resulting from the Sulfide inclusions and organizational segregation, led to the crankshaft fatigue fracture.
结果表明：该曲轴硫化物夹杂偏多、组织偏析导致曲轴强度和硬度偏低，引起曲轴疲劳断裂。
The strength loss is greaser than the fracture toughness loss, because ofthe surface cracks caused. by thermal fatigue.
由于表面热疲劳裂纹的产生，使得材料强度性能损伤大于断裂韧性损伤。
Nodular cast iron crank shaft which has not been processed by adding nitrogen, its surface fatigue strength is lower, this is the reason that results in the fracture.
球墨铸铁曲轴未经过氮化处理，表面疲劳强度低是导致曲轴断裂的原因；
The effects of textures on the elastic modulus, yield and tensile strength, fracture and fatigue properties as well as some problems on the application of texture strengthening were discussed.
列举织构对钛合金弹性、屈服、拉伸强度、断裂及疲劳等各种性能的影响；讨论了有关钛合金织构强化实际应用的一些问题。
This paper discussed the fatigue strength of single-spot-welded joints under constant and variable amplitude loading. The fracture mechanics was also used to analyse the experimental results.
讨论了恒幅及变幅载荷作用下，拉剪点焊接头的疲劳性能，并应用断裂力学对实验结果进行了分析和整理。
The studies were carried out of the test of fatigue crack growth rate and relative to the microscopic morphology of fracture surface in certain high-strength steels.
本文用宏观和微观方法测量了几种高强度钢的疲劳裂纹扩展速率，用金相和断口复型法观察了疲劳断口的微观形态以及与显微组织的关系。
A fracture mechanics approach to high strength optical fiber fatigue can be provided for identifying additional fatigue mechanisms that may control failure in more aggressive fatigue environments.
另外，还提出高强度光纤的断裂机理能区分在更苛刻环境中控制光纤断裂的其它过程。
A fracture mechanics approach to high strength optical fiber fatigue can be provided for identifying additional fatigue mechanisms that may control failure in more aggressive fatigue environments.
另外，还提出高强度光纤的断裂机理能区分在更苛刻环境中控制光纤断裂的其它过程。
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