The crack growth process is a continuous process of alternating crack-tip stretching and ductile crack cracking.
裂纹的增长过程是一个裂纹尖端延伸与延性裂纹启裂持续地交替出现的过程。
As a consequence, the viscosity of material is an important factor in the study of singular field of the crack-tip.
因此，在研究裂纹尖端的奇异场时，材料的粘性效应是一个重要的因素。
Special crack-tip SNQE includes the second term of the asymptotic series expansion of the displacement fields near the crack-tip.
特殊裂纹尖端单节点二次单元包括近裂纹尖端位移近似级数展开第二项。
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。
It is illustrated that they are essentially the isotropic, incompressible, power law type nonlinear elastic crack-tip fields, illustrated.
论证了它们实质上是各向同性、不可压缩、幂率型、非线性弹性裂纹尖端场。
The crack-tip dynamic stress intensity factors decrease with the decrease of the crack length and the increase of the functionally gradient parameter.
无论在什么时刻，裂尖处动态应力强度因子随裂纹的长度减小而减小，随板材料的功能梯度参数增大而减小。
The solution of the crack-tip stress, strain fields for the power law type nonlinear viscoelastic materials, especially for the modified polypropylene, is obtained.
得到了幂率型非线性粘弹性材料，特别是改性聚丙稀的裂纹尖端应力、应变和位移场的解答。
It is found that opposite sign dislocations appear on the slip plane immediately ahead of the crack tip.
结果指出，在紧靠裂纹顶端的滑移面上出现和裂纹位错异号的位错。
The ground area was also checked with dye-penetrant to ensure that no crack tip remained.
打磨区也用着色渗透剂进行了检查，以便确保无裂纹尖端留存。
These negative dislocations seem to enter the crack tip and blunt it, resulting in a dislocation-free zone at the crack tip.
这些负号位错将移至裂纹顶端并使之钝化而留下一个无位错区或低位错密度区。
The research methods and main conclusions of FGMS fracture analysis are reviewed from the aspects of asymptotic fields near the crack tip and crack expansibility.
从裂纹尖端应力场和裂纹扩展两个方面，阐述了功能梯度材料弹性断裂分析的研究方法和主要结论。
The relative equation between stress intensity factor and displacement field near interface crack tip of bimaterials was derived firstly.
首先推导了双材料界面裂纹尖端的位移场和应力强度因子之间的关系式。
Crack propagation is affected by many factors, among which, the crack tip plastic zone attracts a lot of attention.
影响裂纹扩展的因素有许多，这其中，裂纹尖端塑性区引起众多研究者的兴趣。
Numerical solution of these equations yields the intensity factors and the energy release rate at the crack tip.
求解这些方程组，获得了裂纹尖端的强度因子和能量释放率。
The results show that the accuracy for crack tip stress intensity factor using ANSYS software is enough for engineering designs and analysis.
研究结果表明，ANSYS程序裂纹尖端应力强度因子计算方法的计算精度可以满足工程设计和分析需要。
By comparing fatigue crack with electrosparking crack, the effects of crack tip on fracture toughness of ductile iron have been studied.
通过开疲劳裂纹和线切割裂纹的对比试验，研究裂纹尖端的尖锐程度对球墨铸铁断裂韧性的影响；
On the theory of dislocation free zone, crack tip emitted the dislocations , which piled up the tangled in ahead of the intermetallic compounds.
根据位错贫化带理论，裂纹尖端发射的位错将在沉淀析出的金属间化合物前塞积和缠结。
The analysis shows that the compressive loading has a significant contribution towards the crack tip plasticity and the fatigue crack growth.
通过分析表明，压应力对裂纹尖端塑性区和疲劳裂纹的扩展有显著的影响。
The influence of cold expansion on the stress intensity factor distribution in crack tip was also analyzed.
分析了冷扩张对疲劳裂纹尖端应力强度因子分布的影响。
The transient displacement field and the dynamic stress intensity factor at the moving crack tip are obtained.
给出了瞬态的位移场和运动裂纹尖端的动态应力强度因子。
The elastostatic field near the interface crack tip between two incompressible materials is analyzed with the fully nonlinear theory.
采用完全非线性弹性理论，研究了两类不可压缩材料形成的界面裂纹尖端场。
The temperature field and thermal stress field on the crack tip in a metal was studied by numerical simulation method.
用数值模拟方法研究了金属裂纹尖端的温度场和热应力场的分布情况。
The magnetic flux density on the crack tip in a metal pipeline was studied by numerical simulation method.
用数值模拟方法研究了金属管道裂纹尖端磁通量密度的分布情况。
Carbon fibers restrained the matrix cracks growth and diminished the crack tip stress intensity factor.
纤维对基体开裂起抑制作用并降低了裂纹尖端的应力集中。
The outlined models for estimation of crack extension angles rely purely on the stress intensity factors at the crack tip which can be determined by finite element procedures.
用这些模型预测裂纹扩展角时，参数都归结为裂尖处的应力强度因子，而应力强度因子可以用有限元方法求得的。
After defining a logarithm damage variable and effective stress, we introduce a damage evolution equation at crack tip bytaking into account the physical mechanism of the development ofcavities.
本文在定义对数损伤变量和相应的有效应力之后，引入了一种考虑材料内部空穴演变的裂尖损伤演变方程。
Local cleavage fracture might happen in the front of crack tip.
裂尖前方可能发生形变孪晶，裂纹沿孪晶界扩展。
If a current with proper intensity has been switched on, the goal of controlling the melting and welding dimension effectively around the crack tip can be obtained.
文中给出的算例表明，适当控制通入的电流强度，可以达到有效控制裂尖熔化区尺寸以及形成焊口的目的。
If a current with proper intensity has been switched on, the goal of controlling the melting and welding dimension effectively around the crack tip can be obtained.
文中给出的算例表明，适当控制通入的电流强度，可以达到有效控制裂尖熔化区尺寸以及形成焊口的目的。
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