In the present work discovering cutter mark of machining become surface fatigue crack fountain.
在试验过程中发现,疲劳裂纹源多为机加工留在表面的刀痕、划痕.
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裂纹形成的断裂为穿晶解理机制,预应变可导致更多的二次裂纹.
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The fatigue crack under thermal load extension is analyzed in this paper.
用试验的方法研究了热疲劳裂纹的扩展过程.
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The result shows that torque, fatigue crack and material are the main reasons for the breakage.
认为扭振 、 疲劳裂纹及材质是导致万向接轴扁头断裂的主要原因.
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Experimental study is performed on the probabilistic models for the long fatigue crack axle steel.
试验研究了随机疲劳长裂纹扩展率概率模型.
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The model provides a simple , reliable and utilitarian method to predict fatigue crack propagation.
同时也为大型结构的寿命预测提供了可靠的基础.
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Fatigue crack growth in a structure has become a concern to the prolonging of its lifetime.
疲劳裂纹的生长已成为构件延寿工作关注的焦点.
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Fretting fatigue crack initiation tended to occur in fretting scar, especially from grinding pits.
疲劳裂纹易于在微动区, 特别是在蚀坑处萌生和扩展.
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The result showed that the cause of leakage is large stress low cycle fatigue crack.
结果表明:泄漏是由大应力低周疲劳开裂造成的.
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疲劳裂纹的闭合现象改变了传统的疲劳裂纹扩展理论.
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杨凤鹏, 林卓英 ( 2004 ), 表面裂纹疲劳扩展的试验, 北京科技大学学报.
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The formation mechanism of thermal shock fatigue crack of cemented carbide YG 10 was investigated.
研究了YG10硬质合金热冲击疲劳裂纹的形成机制.
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The fatigue crack extended under the applied stress and led to clutch fork crack and failure.
在工作应力作用下,裂纹不断扩展,最后导致拨叉完全开裂失效.
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So, the sucker rod's main failure modes are fatigue fracture and corrosion fatigue crack.
因此, 抽油杆的主要失效形式为疲劳断裂和腐蚀疲劳断裂.
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The fatigue crack growth rate ( FCGR) of 4130X steel in H2S environment is researched in this paper.
研究了4130X钢在硫化氢（H2S）腐蚀介质中的疲劳裂纹扩展速率da／dN。
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用交流电势能落差法（ACPD）测量了一个大型K节点在疲劳破坏过程中表面裂纹增长和破坏过程。
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Measurement of the development of fatigue crack in tubular joints using ACPD technique
ACPD法测量管节点中疲劳裂纹的增长过程
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