And it is suitable to analyze dam crack propagating with fracture mechanics methods.
对坝体裂缝扩展的分析计算，用断裂力学的理论和方法较为适宜。
The Physical nature that the fatigue crack propagating rate is slowed down in the Porosity area was expounded using the energy viewpoint.
用能量观点阐明了缩松区延缓疲劳裂纹扩展的物理本质。
The semi-infinite crack propagating in infinite region with the fiber bridging traction action is equal to the semi-infinite crack propagating in strip.
受桥联纤维力作用的半无限长裂纹在无限域中扩展等效于半无限长裂纹在带域中扩展。
The fracture way and the crack propagating orientation will be changed by the influence of many factors when the crack grows through the bonding interface.
受多种因素影响，裂纹穿过层间界面时，会引起断裂方式和扩展方向的改变。
The role of bolts is to improve the performance of the structural mass, weaken the stress intensity at the crack tips and increase the crack propagating loads.
锚杆作用可增强结构体的力学性能，降低裂纹尖端的应力集中现象，提高裂纹尖端裂纹的起裂荷载；
Because the existing technique is weaker, and the time is limited, the research of the text in the crack turning and predicting crack propagating trajectory is primary.
由于现有技术较为薄弱，加之时间有限，文本在裂纹转折和裂纹扩展轨迹预测上的研究只是初步的。
Therefore, predicting crack turn accurately and predicting the crack propagating trajectory accurately is a important researching content of fracture mechanics for integrally structure.
因此，准确地预测裂纹转折从而准确地预测裂纹扩展轨迹是整体结构断裂力学研究的一个重点内容。
Stress intensity factor indicates the strength of the singular stress field at crack-tip, it is the basis of studying the law of crack propagating and the strength of the component with crack.
应力强度因子表征了裂纹尖端奇异应力场的强度，它是研究裂纹扩展规律和带裂纹构件强度的基础。
The experimental results show that adding rare earth into cast semi steel can defer the time of forming fatigue crack, reduce the speed of crack propagating and increase the impact fatigue resistance.
结果表明，稀土能推迟裂纹萌生的时间，降低裂纹扩展速率，提高其冲击疲劳抗力。
The numerical results have shown that when an earthquake is occurring, the temperature rise near the propagating crack tip may reach several hundred to near one thousand degree.
数值结果表明，地震时传播裂缝尖端附近可产生几百度至近千度的温升。
By observing the initial Angle of crack arid its propagating path, a simple model to predict the retardation effect of Z-shaped fatigue crack was proposed.
通过观察裂纹的开裂角及扩展路径，提出了一个能用来估算Z型裂纹过载迟滞效应的简单模型。
An elastic viscoplastic model is used to analyse stress and strain fields at the tip of a propagating crack under antiplane shear.
弹性-粘塑性模型对反平面剪切扩展裂纹尖端的应力应变场进行了分析。
For the isotropic plastic material, the anisotropic plastic stress fields at a slowly propagating crack tip become the perfectly plastic stress fields.
对于各向同性塑性材料，缓慢扩展裂纹尖端的各向异性塑性应力场就变成理想塑性应力场。
The analytical and computational results indicate that the viscosity effect is an important factor in propagating crack-tip fields.
分析与计算结果表明，黏性效应是扩展裂纹尖端场的一个重要因素。
By the theory of complex functions, a penny-shaped crack on axially symmetric propagating problems for composite materials was studied.
复变函数论的方法，对复合材料的圆盘状裂纹的轴对称性扩展问题进行研究。
Compressive residual stress increases the crack closure effect at the notch and may lead to a non-propagating crack.
残余压应力使缺口处裂纹闭合力增大甚至可出现非扩展裂纹。
Finally, the dynamic stress intensity factors of the fast-propagating crack is obtained.
得到了快速扩展裂纹的动态应力强度因子。
According to the character of the surfaces of a propagating crack, the balance equations are material rate equations.
根据扩展裂纹表面的特征，平衡方程是实质率型方程。
The predicted valued of the fatigue limit of crack initiation the fatigue limit of fracture, and the non-propagating crack length agreed well with the experimental values.
包括裂纹的萌生极限、断裂极限以及停止扩展裂纹长度的预测值与实验结果吻合。
The axisymmetric propagating problem of a penny-shaped crack in composite material is studied using complex function method.
采用复变函数方法研究复合材料中的钱币状裂纹的轴对称传播问题。
In the steady propagating stage, the fatigue crack extended in a toughness tearing way of crystal penetrating.
短裂纹阶段，疲劳裂纹以角裂纹的形式向内扩展；
The thermal fatigue resistance of alloy with 0.3? Addition is superior to that of other alloys, during crack initiating and propagating.
加入0.3 ？的合金不论在裂纹萌生阶段还是裂纹扩展阶段，其热疲劳抗力都优于其它成分的合金。
Therefore the asymptotic behaviour near a anti-plane share dynamic propagating crack-tip field in power-law-viscoplastic material is revealed.
从而本文揭示了幂硬化粘塑性材料反平面剪切动态扩展裂纹尖端场的渐近行为。
Therefore the asymptotic behaviour near a anti-plane share dynamic propagating crack-tip field in power-law-viscoplastic material is revealed.
从而本文揭示了幂硬化粘塑性材料反平面剪切动态扩展裂纹尖端场的渐近行为。
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