裂纹

The results show that using the theory of complex functions, the problems discussed can be easily translated into Riemann-Hilbert problems. Analytical solutions of the displacements, stresses and dynamic stress intensity factors under the action of increasing loads Px/t and Pt^3/x^2 situated at the origin of the coordinates of propagation crack, are gained by self-similar approaches.

研究结果表明：利用复变函数论方法，将所讨论的问题转化为Riemann-Hilbert问题；通过自相似方法，求得纤维增强混凝土的动态扩展裂纹的坐标原点分别在增加载荷Px/t和Pt^3/x^2作用下的位移、应力和动态应力强度因子的解析解。

Results indicate that the maximum stress concentrates on the top surface of the outmost corner of the soldered joint where the potential initial crack may appear.

研究发现，元器件整体的最大应力集中在阵列最拐角焊点的上表面上，该部位可能成为焊点裂纹的发源地。

The 11 kinds of surface crack features of round cast billet formed by high casting temperature, mould flux lubricating film un-uniform at billet shell, unstale casting speed, tundish nozzle eccentric, alloy steel cast billet cooling and reheating speed overhigh, deleterious elements Pb,Sn,As,Sb and Bi residual content in steel over standard requirements and mould copper tube shifting,...

叙述了浇铸温度高，保护渣润滑膜不均匀，铸坯拉速不稳定，二冷水不均匀，中间包水口不对中，合金钢铸坯冷却和再加热速度过快及钢中五害元素超标和结晶器铜管偏移等致使圆铸坯表面形成的 11种裂纹的特征及其预防措施。

This paper formulates two slip extension equations of compression fractures nearby palisades, one of which is relevant to time, and the other is not. Particularly the former can consider time in the occurrence condition of rockburst.

建立了岩壁附近压裂纹的非时间相关和时间相关的2种滑移扩展方程，特别是与时间相关的亚临界扩展方程的建立，可使冲击矿压判据中引入时间参量。

Most of these cracks are found to be parallel to the wavy interface too.

铝和钢的热膨胀系数有较大差异，而在界面导致残余热应力是造成界面裂纹产生和扩展的主要原因。

The novel identification method of single crack situated in a strip and parallel with the boundaries is studied.

研究条形平板中平行于上下边界的单一裂纹的识别问题。

The established neural network can simulate the non-linear relationship of strain, J -integral and constraint parameter A 2 of specimen with crack.

结果表明，神经网络可以用来模拟带裂纹构件韧带上的应变值和 J -积分及约束参数 A 2之间的非线性关系。

The enrichment of point passim will decrease bonding force of atom at the micro defect crack tip, and the micro defect crack grows.

本文将这种描述疲劳裂纹内部萌生过程的微观模型称为"点缺陷沉淀"机理。

The influence of residual thermal stress on repairing cracked metallic panel with composite patch bonded is investigated.

分析了残余热应力对复合材料修理金属裂纹板修理效果的影响。

Based on the fundamental solution of two perfectly bonded elastic halfspaces, the boundary integral equation method is used to reduce the problem to a hypersingular integral equation in which the unknown function is the crack opening displacem...

首先根据双材料空间的弹性力学基本解，使用边界积分方程方法，在有限部积分的意义下导出了以裂纹面位移间断为未知函数的超奇异积分方程，并为其建立了数值法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。