裂纹

Founded upon these results, singular stress fields, complex stress intensity factors and energy release rate for local extension of 3-d planar crack on the interface are rigorously obtained by use of dominant-part analysis of 2-d hypersingular integrals.

在这些研究结果的基础上，应用二维超奇异积分的主部分析方法，精确地得到了界面三维平片裂纹前沿的应力奇性场、复应力强度因子和裂纹局部扩展时的能量释放率。

Solid missile motor ; singular crack element ; interface crack ; stress-intensity factor ; storage ; debond

固体导弹发动机；奇异裂纹单元；界面裂纹；应力强度因子；贮存；脱粘

This paper introduces the type of cracks and the singularity of stress filed at crack tip.

介绍了裂纹的类型、裂纹尖端应力场的奇异性。

With the severity of crack problems increasingly of structures, which are made up of soft steel, to study diagnosis, control, and maintain of the crack, is a new hotspot in fault diagnosis areas.

随着由低碳钢构成的机械承载结构裂纹问题的日益严重，研究机械承载结构裂纹诊断、控制与维修已成为故障诊断学领域的新热点。

In the crack propagation process, grains near the main crack are deformed and elongated tempestuously, resulting in their breaking and new grains with high angle grain boundary formed.

在裂纹扩展过程中，强烈的内应力使主裂纹附近的晶粒产生剧烈的变形，拉长直至破裂，并形成新晶粒；新形成的晶界表现为大角晶界。

The tensile stress at the crack tip is the driving force for the crack propagation.

在拉伸和三点弯曲条件下混凝土裂纹尖端的拉应力集中是裂纹扩展的动力。

The growth rate of short cracksis faster than those of long ones around the threshold stress intensity.

结果表明，在门槛值附近，对于相同的应力强度因子范围，短裂纹扩展速率比长裂纹扩展快。

It was considered that transverse cold cracking on surface due to cold shuts in ingots was the root cause of the crack defects.

指出铸锭中的冷隔形成的表层横向冷裂纹是最终形成裂纹缺陷的根本原因。

Normally, in the bending segment and straightening period of vertical-bending continuous caster, surface and corner transverse cracks will appear in the inner face, corner transverse cracks will appear in the outer surface.

一般来说，在立弯式连铸机的弯曲段与矫直段，在铸坯的内表面上可能出现表面及角部横向裂纹，外表面出现角横裂纹。

While analyzing the crackie of the ball mill, in order to forecast the expansion speed of the crackle and the surplus life-span of the ball mill tube, some relevant theory of fracture mechanics was combined with finite element analysis for the first time, this is a better way with practical innovation.

在分析球磨机裂纹时，首次将有限元分析的结果与断裂力学中相关理论结合起来，对球磨机筒体进行了裂纹扩展速度预测和剩余寿命预测，具有一定的实用创新性。

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。