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 alternate stress stimulates vibration ice, makes the offshore petroleum steel construction fracture because of the fatigue factor.
冰激振动引起的交变应力，将会使海上石油钢结构发生疲劳与断裂玻坏。
The design mainly involves the analysis of the stress, fatigue, thermal ratchet and fracture mechanics, the analysis of flow-induced vibration of the internals and the test verification.
主要涉及的内容包含每个设备部件的应力、疲劳、热棘轮、断裂力学分析和内部构件流致振动分析以及试验验证等。
The authors conclude that spondylolysis is mainly the fatigue fracture due to locally increased stress and is contributing most by backward extension of lumbar spine.
作者认为，椎弓峡部裂实质上主要是由局部应力增高而引起的疲劳骨折，而腰椎后伸与其关系最为密切。
The results show that stress corrosion and corrosion fatigue are the main causes for the fracture failure.
结果表明，断裂失效的原因主要是应力腐蚀和腐蚀疲劳。
We think that the method of estimating maximal pre-applied stress of the working bolt can provide a reference for preventing further fatigue fracture of boxter bolts.
认为用估算螺栓工作时的最大预紧应力的方法，对防止埋头螺栓疲劳断裂再次重复发生有一定的参考价值。
The fatigue fracture mode of LY12CZ aluminum alloy specimen with coating is investigated under stress control condition.
在应力控制下，分析带有涂层的LY 12CZ铝合金构件疲劳断裂方式。
Results When continual stress got together to act on tibia bone which exceed its physiological load tibia bone will fatigue, then fatigued fracture will take place.
结果持续高强度应力积累作用于胫骨超过生理载荷能力时，即会出现胫骨疲劳，继而发生胫骨疲劳骨折。
The mechanism of the shat-blast enhancing technology and its eldest on improving resisfemle to fatigue and stress corrosion fracture are describe briefly in this paper.
本文简要介绍喷丸强化工艺的机理，及在改善金属零部件疲劳断裂和应力腐蚀断裂抗力中的强化效果；
The investigation shows that the vertical shaft of the front fork is subject to fatigue flaw due to the cyclic stress, which leads to the fracture of the vertical shaft.
研究结果表明，前叉立管在周期应力作用的环境中使用，非常容易形成疲劳裂纹，由此导致了摩托车前叉立管的断裂现象。
The fatigue life is seen to depend on the grain size and stress amplitude, based on the nonequilibrium statistical theory of fatigue fracture and the model of interface energy.
在其它参数保持不变的情况下，得出细晶粒多晶体金属的平均疲劳寿命随晶粒尺寸和应力振幅的增加而减小的结论。
It is one of surface strengthening technology which is used to improve the resistance of fatigue fracture and stress corrosion cracking of metalic parts and components.
它是用来改善金属零构件疲劳和应力腐蚀断裂抗力的一种表面强化工艺。
Fracture morphology is more rough in room temperature, low fatigue stress and more fatigue cycles, but the length of fiber pullout is longer.
室温及疲劳循环应力低、循环周次多的断口粗糙度大，纤维拔出较长；
The toughening mechanism of ADI was investigated by microstructure analysis and fracture characteristics of the specimens under tensile test. contact fatigue and stress fatigue.
通过奥贝球铁的单调拉伸加载、接触疲劳和应变疲劳等宏观断裂规律和微观分析，探讨其强韧化机制。
The fracture and the surface of a hip joint fractured invivo has been studied by SEM. It is concluded that the fracture was due to corrosion fatigue cracking by bending stress.
利用SEM对实际使用时断裂的髋关节的断口和表面进行了分析，认为此关节的断裂为以弯曲应力为主的腐蚀疲劳断裂。
The high fatigue properties were found to be related with higher crack closure stress, rough fracture surface and tortuousity of crack path.
较高的疲劳性能与裂纹尖端闭合应力、断口表面粗糙度以及裂纹扩展路径弯折程度有关。
The main course of fatigue fracture is due to existence of the inclusion in the material. The inclusion induce crack initiation, the crack propagation and the axe fracture in the circle stress.
疲劳断裂的主要原因是在材料中存在的夹杂物诱发裂纹源，在循环应力的作用下裂纹扩展导致断裂。
The main reason for the fatigue fracture of material is that the specimens under action of alternating stress engender slip, finally resulting in dislocation stacking.
材料疲劳断裂主要是因为试样在交变应力的作用下上产生滑移最后致使位错塞积而导致的。
Usually the site of fatigue fracture in the connecting rod on the three regions of high stress.
通常疲劳断裂的部位是在连杆上的三个高应力区域。
The main reason of inclined pipe fracture was low frequency stress fatigue failure at temperature field.
斜管开裂的主要原因是温度场下的低频应力疲劳破坏。
The failure of most valve springs is due to the applied positive stress resulting in the fatigue fracture.
多数汽门簧的失效是正应力引起的疲劳失效。
The stress whitening can be clearly seen on the fatigue fracture surface and its region is the initiation and nucleation of fatigue crack which is the main part of total fatigue life.
疲劳断口有应力发白现象；应力发白区为疲劳裂纹形核和萌生区，其寿命占疲劳总寿命的大部分；
One is called the S-N curve of surface fracture mode. It is governed by a crystal slip on the specimen surface, which occurs in the region of short fatigue life and high stress amplitude level.
一组叫做表面破坏模式的S-N曲线，它发生在高应力幅短寿命区，是由试样表面晶体滑移引起的。
One is called the S-N curve of surface fracture mode. It is governed by a crystal slip on the specimen surface, which occurs in the region of short fatigue life and high stress amplitude level.
一组叫做表面破坏模式的S-N曲线，它发生在高应力幅短寿命区，是由试样表面晶体滑移引起的。
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