crack propagation

Fatigue lifetime of valve springs contains two parts: lifetime crack initiation and another for crack propagation.

疲劳寿命一般包括疲劳裂纹萌生寿命和裂纹扩展寿命两部分.

The reliability analysis of fatigue crack propagation life of autofrettaged thick-wall cylinder

自增强厚壁圆筒疲劳裂纹扩展寿命的可靠性分析

Thermal shock resistance results showed high resistance of crack propagation.

热冲击实验表明，有较好的抗裂纹扩展能力。

Transgranular fracture. Fracture of polycrystalline materials by crack propagation through the grains.

多晶材料裂纹穿过晶粒扩展而断裂.

A parameter Δ W is proposed from energy aspect to characterize the capacity of crack propagation. The in-phase thermal fatigue life is the same as the out-of-phase thermal fatigue life for identical Δ W values.

从能量角度提出了一个用于描述裂纹扩展能力的参量ΔW，在相同ΔW值下，同相热疲劳寿命和异相热疲劳相等。

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 delamination area of GLARE was dual ellipse. Crack propagation and delamination propagation were the two fracture mode during the fatigue cycles of GLARE. They were both related to the fiber bridging stress and interacted, which caused the stable propagation of cracks in GLARE.

分层破坏区域呈双椭圆形，裂纹扩展和分层扩展是GLARE层板疲劳过程中的两种损伤模式，二者均与纤维的桥接应力相关，并相互牵制促使GLARE层板的裂纹相对稳定扩展。

Large scale application of this SEN shows that the unique thermal conduct and crack propagation properties of porous layer remarkably increase the thermal-shock resistance of the SEN, and the doping of fine powders of Al2O3 in the slag-line enhances the erosion resistance of the SEN.

现场大批量应用的结果表明，利用多孔材料特殊的热传导特性、裂纹扩展特性以及超细粉末的表面性质，显著增强了FTSC薄板坯连铸浸入式水口的抗热震性能和抗渣侵性能。

The rolling contact fatigue life was found to be markedly related the subsurface crack propagation angle.

理论分析和试验结果表明,接触疲劳寿命与次表面裂纹扩展角之间存在着明显的对应关系.

The experimental results show that by combining rare earth modification with heat treatment the eutectic carbide network changes into carbide piece and precipitation of granular carbide are accelerated as a result deferring crack forming time and reduce crack propagation speed and increase the impact fatigue resistance effectively.

结果表明：稀土与热处理复合作用，可加速网状共晶碳化物向孤立块状的转变，促进粒状碳化物的析出，有效地推迟裂纹产生的时间，降低裂纹扩展速率，提高其冲击疲劳抗力。

High-strength alloy steels can experience rapid crack propagation from stress corrosion under certain loading conditions.

高强度合金钢在一定的载荷下承受应力腐蚀会造成裂纹的快速扩展.

Criteria for crack propagation of ceramic materials are deduced from nonlocal elasticity theory in this paper.

本文根据非局部弹性理论推导了陶瓷材料的裂纹扩展准则.

Grain size had some effect on the rate of crack propagation.

晶粒尺寸大小对裂纹扩展速率也有影响.

Under the action of outer load, crack propagation process of concrete is simulated and analyzed.

以此来模拟分析出在外力作用下混凝土材料的裂纹的扩展过程.

Meanwhile , this work shows that crack propagation is limited and stable under cyclic compression.

研究表明,裂纹在循环压缩载荷作用下的扩展能力是有限的、稳定的.

Intergranular fracture. Fracture of polycrystalline materials by crack propagation along grain boundaries.

多晶材料裂纹沿着晶界扩展而断裂.

An approach for modeling rock crack propagation using discontinuous deformation analysis DDA method is presented.

提出一种用非连续变形分析方法模拟岩石裂纹扩展的方法.

It is found that intragranular structure is formed, and the tortuous routes of crack propagation and the branching, deflecting and bridging are also observed on the fracture surface.

通过对其断口的观察，发现形成了晶内型结构，并观察到了裂纹曲折的扩展路径以及裂纹的分叉、偏转、桥联，这些有助于材料强度和韧性提高的现象。

Based on the analysis of simulated results, it revealed that tensile stress at the crack tip is the driving force for the crack propagation, and the heterogeneity of mechanical property of material among concrete influences greatly on the curvilinear of crack propagation path.

通过对数值模拟结果的分析，揭示出混凝土在拉伸条件下裂纹尖端的拉应力集中是裂纹扩展的动力，混凝土组成材料力学性质的非均匀性是造成裂纹扩展路径曲折的重要原因。

An increment iteration method is used to solve the crack propagation problem.

使用一种增量迭代法求解裂纹的扩展过程.

However, the higher CRSS of basal slip raised the crack propagation driving force.

但较高的临界分切应力使得基面滑移系实际开动困难，增加了裂纹扩展所需驱动力。

The coalescence between short cracks leads to crack propagation and the crack path is predominantly transgranular.

短裂纹的汇合造成裂纹发展且裂纹路径以穿晶为主.

Strength variation and crack propagation of thermally shocked Ca 0.6 Mg 0.4 Zr 4 ( PO 4) 6 ceramics are shown to be dependent on the thermal expansion coefficient and axial thermal expansion characteristics of the ceramics.

Ca0.6Mg0.4Zr4（PO4）6（简称CM）陶瓷热震后的强度变化与裂纹扩展依赖于材料的热膨胀系数和轴向膨胀特性。

Crack propagation usually begins slowly.

裂纹的增长常常是开始缓慢.

The fracture procedure is a whole process of crack initiation, crack propagation and final fracture.

材料断裂过程为裂纹萌生 、 扩展和最后断裂过程,组织及实验条件对材料断裂有较大影响.

Crack Propagation in Polycrystalline Elastic-Viscoplastic Materials Using Cohesive Zone Models

利用内聚力模型（CZM）模拟弹粘塑性多晶体的裂纹扩展

Effect of hydrogen on fatigue crack propagation in bond weld fusion zone

电解充氢对堆焊熔合区疲劳裂纹扩展行为的影响

The results shown that the different zones of butt joints have different fatigue crack propagation rate. The average load, welding residual stress and the microstructures influenced the propagating rate of fatigue crack.

结果表明，焊接接头的不同部位疲劳裂纹扩展速率不同，平均应力、焊接残余应力、金相组织对疲劳裂纹的扩展速率都有一定的影响。

The paper focused on the discussion on agglomeration and coating crack propagation during oxide ceramic manufacturing.

探讨了它们各自适用的范围,并重点讨论氧化物陶瓷材料制备过程中粉末团聚和膜裂纹扩展等有关问题.

This paper describes a method in which the whole process of the contact fatigue crack propagation can be detected from the crack incubation to the spalling.

本文叙述了一种能检测从裂纹萌生到剥落全过程的接触疲劳裂纹扩展的方法，建立了接触疲劳裂纹扩展曲线&裂纹长度A和循环次数N之间的关系。