Crack defect promotes crack initiation and growth.
裂纹缺陷促进了裂纹的萌生和扩展。
A method for crack initiation life prediction of components is presented.
本文提出一种零部件的裂纹形成寿命的类比估算方法。
The fatigue crack initiation behaviour and its mechanism were investigated.
研究它们在循环加载下的疲劳裂纹萌生行为及其机制。
The results shows that crack initiation induced by particles of additives or fillers.
结果表明，裂纹萌生是由较大的第二相颗粒引起的。
The causations of crack initiation in a right landing chassis wheel axle were analyzed.
分析了某型飞机右起落架轮轴产生裂纹的原因。
The crack initiation life and the crack fracture life are the main life of the specimen.
试样寿命主要由裂纹萌生寿命和断裂寿命组成，扩展寿命所占比例较少。
The results indicate that sulfur content has marked influence on the crack initiation energy.
研究发现，硫含量对裂纹塑性形核功的影响最显著。
Pre-damage would accelerate crack initiation and propagation, and increase the degree of damage.
预损伤加快了裂纹的产生、扩展，使得损伤程度进一步加重；
Because of the bad compatibility of wood flour and polyethylene, the crack initiation time shortened.
木粉与高密度聚乙烯的相容性不好，是裂纹引发时间缩短的主要原因。
The methods of fatigue crack initiation life predictions under complex load are introduced in this paper.
介绍了复杂载荷下疲劳裂纹形成寿命预测的方法。
Crack initiation and propagation process in A356 aluminium alloy under impact load have been investigated.
研究了A356铝合金在冲击载荷作用下的裂纹萌生及其扩展过程。
The primary failure model is fatigue fracture that is always resulted by the crack initiation and propagation.
疲劳断裂是气门弹簧失效的主要模式，它是疲劳裂纹萌生及其扩展的结果。
Improper rework practices can result in unscheduled maintenance or surface damage that causes crack initiation.
翻修不当可能会造成非计划性维修和表面损伤从而造成裂纹。
The problem of crack initiation in epoxy resin sealing compounds at low temperature is discussed in this paper.
针对如何解决环氧树脂灌封料在低温下易产生开裂这一问题进行了探讨。
According to the mode of crack propagation the mechanism of crack initiation and propagation was also discussed.
根据裂纹扩展方式的变化，对氢致裂纹萌生和扩展机制进行了讨论。
Finally, examples are given for predicting the fatigue crack initiation life from the tensile properties of steels.
最后给出了根据钢的拉伸性能估算疲劳裂纹起始寿命的实例。
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。
The feature of macro-profile is analyzed, and the crack initiation and extending mechanism of brake disc is discussed.
分析了制动盘裂纹剖面的宏观形貌特征，并对制动盘裂纹萌生和扩展机理进行探讨。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
复合型裂纹起裂、扩展和止裂问题一直是断裂力学研究的重点。
Plating into a transition (radius transition or undercut) will create a stress concentration that can cause crack initiation.
如果过渡段被电镀(倒角和内切槽)将会产生应力集中，造成裂纹。
Moreover, the study indicated that the fatigue crack initiation period is the main portion of the total fatigue life at long lives.
该研究还表明，在长寿命范围，裂纹起始寿命是疲劳全寿命的主要部分。
The fatigue fractography consists of several different zones, including fatigue crack initiation, slow, fast propagation and final fracture.
疲劳断口上存在典型的疲劳裂纹萌生区、缓慢扩展区、快速扩展区和最后瞬断区。
Corrosion pitting also can lead to fatigue crack initiation depending on the component, the location of pitting, and cyclic loading conditions.
腐蚀斑点还会因不同的部件、斑点的位置和循环载荷状况，导致一些不同的疲劳裂纹。
Removing visible surface corrosion before pitting begins (such as during a C-check) helps prevent conditions that can lead to crack initiation.
在出现斑点之前去除可见的表面腐蚀(诸如c -检)有助于预防发生裂纹。
Since the pressure gradient affects stress strength of crack top, it is unsuitable to judge crack initiation by the traditional breakdown pressure.
气体压力分布影响裂缝尖端应力强度，因而不能用传统的破裂压力来判断裂缝起裂扩展。
When the component is installed on an airplane, this internal damage can lead to crack initiation and propagation, resulting in component fracture.
如果把这样的部件安装在飞机上，其内部损伤会导致裂纹并扩展，最终造成部件断裂。
Objective to study the crack initiation and fracture of porcelain-fused-metal (PFM) crown under monotonic load by means of experimental techniques.
目的研究烤瓷熔附金属冠中央窝受单调递增静态载荷下的裂纹产生和破坏形式。
The results indicate that the chamber pressurization has strong effects on the convective burning in the crack, crack initiation and fracture patterns.
结果表明，燃烧室升压梯度对裂纹腔内对流燃烧流场、以及裂纹的开裂时间和开裂方式都有很大影响。
The micro wear mechanism for PEN is plastic flow and broken of the fiber structure, while that for PI is crack initiation, extending and block fracture.
PEN薄带的微观磨损机理主要是纤维组织的塑性流动和拉断，而PI薄带的微观磨损机理为裂纹的萌生、扩张和块状剥落。
The micro wear mechanism for PEN is plastic flow and broken of the fiber structure, while that for PI is crack initiation, extending and block fracture.
PEN薄带的微观磨损机理主要是纤维组织的塑性流动和拉断，而PI薄带的微观磨损机理为裂纹的萌生、扩张和块状剥落。
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