The stress field near crack tip is an important factor to effect crack extension.
裂纹缺陷周围的应力变形场是影响裂纹扩展的重要因素。
Stress analysis in variation states at crack tip and notch crown tip is presented.
分析了椭圆孔口端点和裂纹端点处的变动态应力。
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。
This paper introduces the type of cracks and the singularity of stress filed at crack tip.
介绍了裂纹的类型、裂纹尖端应力场的奇异性。
There is a fracture process zone near the crack tip for the tensile strain softening materials.
在应变软化材料的主裂缝尖端存在一断裂过渡区。
The load-strain relationship at crack tip is obtained through electric strain gauge measurement.
用电测法得到了裂尖处的载荷—应变标定关系。
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 strength matching factor m has a great influence on the J integral in the vicinity of the crack tip.
焊接接头强度匹配因子m对裂纹尖端的J积分值有很大的影响。
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。
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。
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。
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。
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。
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 crack tip stress-strain field of elastic-plastic materials are analysed by finite element method in the plane stress condition.
用有限元方法对平面应力条件下弹塑性材料的裂纹尖端应力应变场进行了计算。
Dislocation cell and sub grain formed in ferrite grain are found at the stage of fatigue crack propagation in the area of crack tip.
疲劳裂纹扩展阶段裂纹尖端附近为形成于铁素体晶粒内的位错胞及亚晶。
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 dislocation distribution function in the plastic zone at a crack tip is calculated with the help of a modified BCS-type crack model.
本文改进BCS型裂纹位错模型，并对裂纹顶端范性区的位错密度分布进行了计算。
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 contrary, the easily broken particles enhance the extension stress at the crack tip, and hence the propagation rate of the crack.
反之，易破碎的粒子则增加了裂纹尖端的扩展应力，提高了裂纹扩展速率。
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。
In the fracture study of softening materials, the damage area of crack tip is regarded as a piece of nonlinear crack with cohesive force.
在混凝土类软化材料断裂研究中，裂纹端部损伤区被简化为具有黏聚应力分布的非线性裂纹，该黏聚力对裂纹扩展有阻抗作用。
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。
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。
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 size of current path, resistivity, power density are main factors that effect the temperature field and temperature gradient field at crack tip.
试件的通流尺寸、电阻率、导入电流密度是影响裂纹尖端温度场和温度梯度场的主要因素。
An elastic viscoplastic material model was adopted to the asymptotic analysis on power law and logarithmic singularity of dynamic growing crack tip.
本文利用弹-粘-塑性材料力学模型，对动态扩展裂纹尖端的指数奇异性和对数奇异性进行了渐近分析。
Finally, with the introduction of a fast varying zone ahead of the crack tip, a solution with fully continuous stress and velocity fields is obtained.
最后，通过在裂尖前方引人一快变化区，本文得到了一个在裂尖周围应力和速度全连续的渐近解。
With the method of asymptotic and variable separation, the stress singularity near the conic-shaped crack tip at a bi-material interface is fulfilled.
据此利用渐近展开和分离变量相结合的方法对裂尖奇异性指数的变化进行了分析。
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