裂纹

Original cracks are obtained by directional fracture with the slotted cartridge. This paper discusses the normal law and mode of crack propagation and analy...

研究了爆炸载荷下的裂纹起裂、发展和止裂的动态扩展行为，分析了其破坏模式、动态应力强度因子及裂纹扩展速度

By using Muskhelishvili complex function methods, the problem of bimaterial incline crack was induced to the solving of Cauchy singular integral equations, in which the unknown functions are the dislocation density functions.

采用 Muskhelishvili复变函数的方法，将两相材料倾斜裂纹问题归结为以裂纹表面位错密度函数为未知量的 Cauchy型奇异积分方程的求解。

With the methods of conformal mapping and the Cauchy integral, two cases of crack geometries are studied: one is for a crack emanating from a circular hole and the other is for two symmetric cracks emanating from a circular hole.

利用保角变换和 Cauchy 积分的方法，对含有圆孔孔边单裂纹和双裂纹的压电弹性体分别进行了分析。

By using the Muskhelishvili complex methods, the issue of interaction between bimaterial incline crack s was reduced to solve the Cauchy singular integral equations, in which the unknown functions are the dislocation density functions.

采用 Muskhelishvili复变函数方法，研究两相材料中两根倾斜裂纹应力强度因子的相互影响，将问题归结为求解一组 Cauchy型奇异积分方程，对倾斜裂纹端点的应力强度因子作了数值求解。

The edge internal branch crack of half-plane can be considered as a superposition of many single cracks, thus a set of Cauchy singular integral equations can be formulated, where the distributing dislocation density serves as the unknown function.

将半平面边缘内分又裂纹问题看作是许多单裂纹问题的叠加，建立了以分布位错密度为未知函数的Cauchy型奇异积分方程组。

This is formed by the cracks oscillating about the centerline in the direction of crack propagation.

这是由于在裂纹的传播过程中，裂纹尖端沿着传播方向的中线上下振荡所形成的。

The results showed that chemisorption of liquid metal atoms could facilitate dislocation emission ,multiplication and motioll.

结果表明：液体金属吸附后能促进位错的发射、增殖和运动；当吸附促进位错发射和运动达到临界状态时，脆性微裂纹就在原裂纹顶端或在无位错区中形核并解理扩展。

The parallel or series assumption cannot be applicable to the synthesis mode of stress and strain for complexus theory of geomaterials damage.

狭义上，可认为损伤力学是利用宏观理论分析与解决在宏观裂纹出现以前微观缺陷、微裂纹、微空穴的

The result shows that the probability arithmetic of the random crack core evolvement without considering some simultaneous fiber breaks brings marked errors , and computational precisions of the random crack core evolvement probability and composite st rength could be enhanced with considering some fiber breaks at the same time.

计算表明：忽略多根纤维同时断裂的算法会使随机裂纹核扩展概率计算结果产生较大的误差，而考虑多根纤维同时断裂的算法可以提高裂纹扩展概率的计算精度，从而有利于提高复合材料强度的预测精度。

By means of the complex variable function method and introducing the conformal transformation,the plane elasticity problem about static crack of a finite width strip with a single edge crack is analyzed further and the exact solutions to the SIFs are found out and generalized to dynamics.

利用复变方法，通过构造适当的保角映射，分析了有限宽单边裂纹带中静态裂纹的平面弹性问题，给出应力强度因子的精确解，并将其推广到动力学。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。