Using the interpolation models for both singular crack tip elements and other crack linear elements, the boundary element formulas of the torsion rigidity and stress intensity factors were given.
利用裂纹尖端的奇异元和线性元插值模型，给出了扭转刚度和应力强度因子的边界元计算公式。
When FEA model was formed, the quadratic singular elements of the tip of the crack were formed by node to element.
在建立有限元模型时对于裂纹尖端的单元，采用节点—单元的方式生成二次奇异单元。
Concerns BEM (boundary element method) of electric current concentrating effect and temperature rising analysis at the crack tip with high density electric pulse.
给出金属板在高密度电流脉冲下裂纹尖端电流集肤效应和急剧发热升温解析的边界元法。
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。
So such, both shape consistent with boundary element geometrical shape, and simulate crack tip close-by variety law of stress and strain with higher precision, and enhancing calculative efficiency.
如此，既能与边界单元几何形状基本拟合，又能高精度地模拟裂纹尖端附近位移和应力变化规律，并提高计算效率。
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。
The J integral values in the vicinity of the crack tip in welded joints were numerically analyzed by using the plane stress elastic-plastic finite element method.
采用平面应力弹塑性有限元法研究了含有多部损伤的焊接接头裂纹尖端J积分的变化规律。
Combining general four-node element around crack tip element, a hybrid-stress finite element model is developed, Accordingly a hybrid finite element method to fo.
与四节点单元相结合，提出一种求解自由边界面端部广义应力强度因子的杂交元法。
Comparison between the calculated results with coarse and fine finite element meshes around crack tip is also made.
同时，在计算方法上，对裂纹顶端附近较密和较疏两种单元网格的计算结果进行了比较。
Three dimensional finite element method was used to analyse the stress and the strain in the vicinity of crack tip.
并采用三维有限元数值法分析了裂纹尖端的应力应变场。
Combined with general four-node element around crack tip element, a new hybrid finite element method to study stress intensity factors for interfacial crack is introduced.
与四节点单元相结合，由此提出了一种新的求解应力强度因子的杂交元法。
The stiffness matrix of a hybrid crack-tip singular element is first derived, then by use of first-order Taylor expansion the mean and variance of stress intensity factors are formulated.
文中首先给出了杂交模式的裂纹尖端奇异单元的刚度矩阵，然后基于随机场的局部平均理论和一阶泰勒展开得到了应力强度因子均值和方差的计算公式。
The stiffness matrix of a hybrid crack-tip singular element is first derived, then by use of first-order Taylor expansion the mean and variance of stress intensity factors are formulated.
文中首先给出了杂交模式的裂纹尖端奇异单元的刚度矩阵，然后基于随机场的局部平均理论和一阶泰勒展开得到了应力强度因子均值和方差的计算公式。
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