Solves the problem of boundary value on an annular crack by using the nonlocal stress solution of an axisymmetric crack problem and approximative method of series expansion.
利用已得到的三维轴对称问题的非局部弹性应力的解，采用级数近似展开的方法，求解环状裂纹的边值问题。
This fundamental solution has satisfied free crack boundary conditions.
该基本解满足自由裂纹的边界条件。
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。
Based on the boundary variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack boundary are obtained.
由此求得动态裂纹扩展时，沿裂纹边界的能量释放量和能量释放率(动态裂纹扩展力)。
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。
This method simulates the boundary in half-space into a large crack containing in an infinitely great elastic medium, by which the surface crack in arbitrary shape can be well-treated.
通过把半空间的边界模拟成一个包含在无穷大弹性介质中大裂纹，此法能很好的处理具有任意表面形状的表面裂纹。
Boundary value problem of a plate with crack and defect such as circular hole is a multi-connected domain problem.
带有裂纹和缺陷孔洞的板的问题是一个多连域的边值问题，这类问题适合用边界元法所具有的高精度特性来求解。
A boundary 's equation of microcrack region near crack tip of such brittle materials as concrete has been obtained according to the Griffith' s criterion and fracture mechanics.
利用格利菲思强度准则和断裂力学原理求得了混凝土类脆性材料裂缝端部微裂缝区的边界方程。
In this paper, boundary collocation method is used to calculate stress intensity factors of an eccentric crack in an elliptical disc subjected to a uniform tension stress.
本文用边界配置方法计算了不同情形下含偏心裂纹椭圆盘受均布载荷时的应力强度因子。
The effect of an elastic square inclusion on a crack tip's stress intensity factor in an infinite elastic body is considered and the new boundary integral equations are derived.
研究无限弹性体中正方形弹性夹杂对裂纹应力强度因子的影响，给出了问题的新边界积分方程。
The boundary conditions on the crack surfaces are satisfied exactly. While the conditions on the other boundaries are satisfied approximately by using the method of weighted residuals.
精确地满足裂纹表面的边界条件，其他的边界条件采用加权残数法近似地得到满足。
The paper evaluates the limitations that semielliptical surface crack in a shaft is simplified to a unilateral crack in a finite boundary plane and a cross straight line crack in a semi infinite body.
评价了将轴表面半椭圆裂纹简化为有限边界平板的单边裂纹问题和半无限体表面穿透直线裂纹问题来处理的局限性。
This paper analyzes the rectangular-shaped crack in the graded materials by using the dual boundary element method.
采用对偶边界元方法分析了梯度材料中的矩形裂纹。
The former is collocated exclusively on the uncracked boundary, and the latter on one side of the crack surface.
位移边界积分方程的源点配置在非裂纹边界上，面力边界积分方程的源点配置在裂纹面上。
In this paper, the boundary element method for calculating surface crack is studied and suitable location or the singular isoparametric elements, is presented.
本文研究了计算半随圆表面裂纹应力强度因子的边界元方法。
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。
Lastly a rolling ball technique was used to remedy the crack and gap in the lung boundary.
最后通过滚球法弥合肺边缘的裂缝及缺口。
The width measurement of the main crack The width measurement is based on the skeleton and continuous boundary of crack.
裂缝的宽度测量裂缝宽度测量是建立在对裂缝的骨架和边缘提取基础上。
This paper discusses the energy release of crack and cut in propagation under general boundary conditions and points out that the use of force potential can result in an error under these conditions.
本文讨论了一般边界条件下裂缝扩展的能量释放，指出了此时运用力势概念所能导致的错误。
In the limit, for very weak rock, settlement at the boundary can also occur before the separation crack.
在极限情况下，对于非常软弱的岩石，形成分离裂缝之前，也会发生边界处的沉陷。
The stress intensity factor of crack can be calculated from the stress concentration factor of corresponding notch when the boundary condition and other geometric conditions are in the same.
在边界条件和其他几何条件相同时，可以通过切口的应力集中系 数求得相应裂纹问题的应力强度因子。
The results show that main cause of conchoidal fracture forming is that composition segregation in solidification grain boundary of casting steel reduces the resistance of crack propagation.
结果表明，沿一次晶晶界的成分偏析对裂纹扩展阻力的降低作用是铸钢中贝壳状断口形成的主要原因。
The crack in quenching boundary of the hydraulic press plunger surface was analyzed by means of chemical composition analysis, microstructure examination and microhardness testing.
采用化学分析、金相检验和显微硬度梯度试验等方法对油压机柱塞表面淬火交界处裂纹进行了分析。
The stress intensity factors of bimaterial interface crack are analyzed using the boundary element method with bimaterial fundamental solutions.
采用双材料基本解建立边界元法基本方程，计算双材料界面裂纹尖端附近的应力和位移场。
Numerical solutions of governing equations are obtained in combination with boundary conditions of each problem, and the fully continuous stress, strain and displacement in crack-tip field is found.
根据问题的边界条件，通过对控制方程进行数值求解，得到了裂纹尖端的连续的应力、应变和位移场。
Crack propagation conducts alternatively between the weld zone and the partially molten zone, and is not strictly to rupture at W/F boundary surface.
裂纹扩展在焊缝区和半熔化区之间交替进行，并非严格按W／F界面破断。
It is shown that the zigzag grain boundary may delay the initiation, growth and propagation of crack, as well as may also influence the crack morphology and the fracture mode markedly.
研究表明，弯曲晶界对裂纹的萌生、长大及扩展，对裂纹的形态及断裂方式，都有显著的影响。
The presence of grain boundary allotriomorphic ferrite can increase the compatible deformation capability of duplex microstructure, improve the crack initiation energy under impact loading;
适量仿晶界型铁素体的存在增加了复相组织的协调变形能力，提高了裂纹形成功；
Analytical results have shown that the influence of the orientation and position of single crack originated from the boundary of tunnel on the fracture of rock around tunnel is considerable.
分析结果表明裂隙的方向和位置对围岩断裂的影响是显著的。
Analytical results have shown that the influence of the orientation and position of single crack originated from the boundary of tunnel on the fracture of rock around tunnel is considerable.
分析结果表明裂隙的方向和位置对围岩断裂的影响是显著的。
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