fatigue crack

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.

The hot wear mechanism, thermal fatigue crack initiation and propagation as well as the effect of the micro-structures and properties of materials are studied by means of optical metallograph, SEM, image analysis, debris analysis and high temperature hardness test.

结合光学金相、电子扫描、图象分析、磨屑分析、高温硬度试验等方法，对轧辊材料的磨损机制，热疲劳裂纹的萌生和扩展以及材料组织性能产生影响的原因进行了分析说明。

The fractography of the fatigue crack initiation displayed cleavage facet and more second cracks after pre-training.

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.

Thermal fatigue crack forming process of steel bonded carbide containing 35% WC by the action of thermal stress has been observed time and time again.

对含有35%WC的钢结硬质合金在热应力作用下热疲劳裂纹形成过程进行了反复观察。

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.

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.

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.

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.

Prediction of thermal fatigue crack initiation cycles of die for high speed hot die forging

高速热模锻模具热疲劳裂纹萌生期预测

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.

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.

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.

The results show that the resistances thermal fatigue crack initiation and propagation in steel are reduced due to the Carburizing and nitriding, and nitrogen has the prominent effect.

结果表明，表面增碳及渗氮均使钢的热疲劳裂纹萌生及扩展抗力降低，渗氮尤为显著。

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.

The fatigue testing heterogeneous plates showed that the mechanical heterogeneity affected the fatigue crack growth rate.

试验表明,力学不均匀性影响疲劳裂纹扩展速率.

Shlyannikov , Z . B . Kuang , F . P . Yang ( 2004 ), Surface fatigue crack growth behavior , Russian journal Power Engineering Problems.

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.

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.

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.

The traditional theory of propagation of fatigue crack is transformed by the closure phenomenon of crackfatigue.

疲劳裂纹的闭合现象改变了传统的疲劳裂纹扩展理论.

The results show that the thermal fatigue cracks after forming propagate preferentially in the hard phase, and the propagation of crack is stoped and dulled when it meet steel basic phase.

结果表明：萌生后的热疲劳裂纹优先在硬质相中扩展，遇到钢基体相后受阻、化。