最后，得出了应力强度因子计算公式。
应力强度因子随着裂纹的扩展而下降。
The intensity factor decreases with the propagation of cracks.
得到了快速扩展裂纹的动态应力强度因子。
Finally, the dynamic stress intensity factors of the fast-propagating crack is obtained.
随着应力强度因子的下降，声发射也随着减少。
The acoustic emission also shows a decreasing rate, following the drop in stress-intensity factor.
疲劳强度低于弹性极限或屈服强度等静应力强度。
Fatigue strength is less than static stress strength such as elasticity limit, yield strength.
研究了动载荷作用下带裂纹厚壁筒的应力强度因子。
We study stress intensity factor of thick wall cylinder with cracks under dynamic load.
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 influence of cold expansion on the stress intensity factor distribution in crack tip was also analyzed.
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 transient displacement field and the dynamic stress intensity factor at the moving crack tip are obtained.
研究这种结构的应力强度对于压力容器的设计具有重要意义。
It is important for the design of pressure vessels to study stress intensity of this type of structure.
正交各向异性和各向同性材料的应力强度因子均为本文的特例。
The stress intensity factors of both orthotropic and isotropic materials can be obtained from the present results.
采用线弹簧模型求解多个共面任意分布表面裂纹的应力强度因子。
The stress intensity factors of multitudinous arbitrarily distributed coplanar surface cracks are solved by using the line - spring model.
最后得到垂直裂纹端点处的应力强度因子和压头下方的压力数值。
Stress intensity factors at vertical crack tips and numerical results of pressure under punch are obtained.
人们发现，动态应力强度因子的变化滞后于应力脉冲冲击几微秒。
The dynamic SIF variation was found to lag behind the stress - pulse impingement by several microseconds.
基于裂纹表面位移间断的计算结果得到了裂纹前沿的应力强度因子。
So the stress intensity factors can be obtained by the displacement discontinuities.
试样的受力状态对动态应力强度因子历史曲线的确定具有重要影响。
The loading state of specimen is important for calculation of the temporal evolution of dynamic stress intensity factor.
但是，该试样的重要力学参数即无量纲应力强度因子的标定尚有问题。
However, the calibration of the dimensionless stress intensity factor, which is an important mechanical parameter, is still in question.
它们的结果表明：钝切口比尖锐切口的动态应力强度因子增长率更快。
Their results showed a more rapid rate of increase in the dynamic sif for blunt than for sharp notches.
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。
The relative equation between stress intensity factor and displacement field near interface crack tip of bimaterials was derived firstly.
此外，对于基坑开挖采用总应力法分析时，应按卸载总应力强度指标计算。
Furthermore, the unloading shear strength parameters should be applied when using total stress method to analyse excavation problems.
地质预测法主要有曲率法、构造应力场模拟法、断层应力强度因子计算法；
Geological methods mainly include curvature method, structural stress modeling and strength factor computation of fault stress.
通过对弱奇异积分方程的数值求解，可得裂纹端点和交点处的应力强度因子。
Through the numerical solution of the integral equation, the stress intensity factors at the end points of the crack and intersection are obtained.
求解了五种情况的应力强度因子，采用的方法是艾雷应力函数和加权残数法。
In this article a solution is found of the stress intensity factors in five cases. The solution is based on Airy stress function and the method of weighted residuals.
给出高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses have been presented.
通过积分集中载荷的应力强度因子求分布载荷的应力强度因子的方法是可行的。
This method proved available to find the stress intensity factors of the distributed load by integrating the intensity factors of concentration load.
应力强度因子(K)：断裂力学中使用的一个因子，说明裂纹尖端处的应力强度。
Stress intensity factor (k). A factor used in fracture mechanics to specify the stress intensity at the tip of a crack.
给出了高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses were given out.
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。
Since the pressure gradient affects stress strength of crack top, it is unsuitable to judge crack initiation by the traditional breakdown pressure.
基于这种裂纹单元，作者引入椭圆参数方程，推出一种计算裂纹前缘点应力强度因子的新方法。
Based on this kind of crack element, and by introducing parametric equation of ellipse, a new method for estimating stress intensity factor is proposed.
基于这种裂纹单元，作者引入椭圆参数方程，推出一种计算裂纹前缘点应力强度因子的新方法。
Based on this kind of crack element, and by introducing parametric equation of ellipse, a new method for estimating stress intensity factor is proposed.
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