裂纹

The propagation direction of thermal fatigue crack has some crystal orientation and is along 〈110〉 direction in { 111 } plane.

合金热疲劳裂纹扩展具有一定的晶体学取向，沿{111}面〈110〉方向即与枝晶生长方向呈45 角扩展。

The basic theory of extended finite element method are expounded particularly, and given a class of enrichment displacement functions---the exponent discontinuous function which is presented to simulate the discontinuous character resulted from discontinuity such as crack.

本文详细阐述了扩展有限元法的基本原理，提出一类附加位移形函数-指数型间断函数来描述由裂纹所导致的位移不连续规律。

XFEM;the exponent discontinuous function;crack

扩展有限元法；指数间断函数；裂纹

Using the method, good effect was obtained in connect the breaks and dispart conglutinated ridges.

使用这种方法，对断裂纹线的连接，粘连纹线的分离，都有较好的效果。

After the initiation of crack, the crack propagating of alloys with 0.5%Ce addition is accelerated evidently because of the appearance of needle rear earth rich phases which dissever the matrix and lead to the decrease of mechanical properties and thermal fatigue resistance.

加入0.5%Ce的合金在裂纹形成后期扩展速度明显加快，这是因为合金中出现针状富稀土相，这种针状相割裂了基体，使得合金力学性能降低、热疲劳抗力下降。

By means of automotive driving axle housing model tests, a weaken signal component covered by stronger exciting response signal was obtained by using of wavelet multiresolution analysis and a AR signal model was formed.

通过汽车驱动桥模型试验，利用子波变换多分辨分析技术，提取了淹没于响应信号中的微弱信号分量，并建立了裂纹信号的AR模型。

Furthermore, the paper emphasizes the problem of ductile crack model and its analytic solution .

特别强调了讨论钝裂纹问题及其分析解的重要理论意义。

The dynamic propagation of Dugdale model on Mode Ⅲ crack with nonlinear characters of materials was investigated using the theory of complex functions.

通过复变函数论的方法，对材料的非线性特性下的Ⅲ型裂纹Dugdale模型的动态扩展问题进行研究。

In this paper, a detail analysis of the circumferential through-crack in the cylindrical shells with different boundary restraints is performed by means of the elastic-plastic finite element method. The results obtained provide the application of some analysis methods of elastic-plastic fracture parameters such as Dugdale model with a necessary theoretical base.

本文针对柱壳周向壁穿裂纹，利用弹塑性有限元的数值解，在不同的约束条件下进行了较为详细的分析，获得了一些带有规律性的结果，为Dugdale模型等一些弹塑性断裂参数计算方法的应用提供了必要的理论基础。

Material damage ; damage zone ; continuum damage mechanics; crack tip ; Dugdale model ; metal sheet

材料损伤；损伤区；损伤力学；裂纹尖端； Dugdale模型；金属板材

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。