crack front meaning in English
断裂前沿
裂纹前缘
Examples
- The size and shape of the crack front were updated using the result of finite element program , and then the crack propagation was simulated by moving the node
利用有限元计算的结果来自动更新裂纹前沿的尺寸和几何形状，并使用节点移动法来模拟裂纹的扩展过程。 - Unknown displacement and electric potential jumps in the integral equations are approximated with a product of fundamental density function and polynomials , in which the fundamental density function reflects singular behavior of electroelastic fields near the crack front and the polynomials can be reduced to a real constant under uniform loading
超奇异积分方程中的未知位移间断和电势间断近似地表示为基本密度函数与多项式之积，其中基本密度函数反映了椭圆片状裂纹前沿电弹性场的奇异性，而多项式在均布载荷作用下可用一个常数来表达。 - The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks , detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack , a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading . the distributions of tz are minutely studied in the forward section of the cracks . strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions
全文主要研究内容和学术贡献如下: 1 .针对一般三维裂纹端部场应力约束准确解析的困难,对均匀拉伸载荷作用下各向同性弹性板中穿透厚度中心直裂纹、半椭圆表面裂纹和1 / 4椭圆角裂纹进行了大量详细的全场应力三维有限元分析,首次全面分析了非穿透裂纹端部场三维影响区范围,给出了不同形状三维裂纹前沿离面应力约束因子tz的数值解,并结合k场平面解给出了非穿透裂纹端部应力场k - tz双参数描述。