裂纹

It can not interpret the fact why liquation cracks appear around the fusion line and are very short, hut it may be satisfactorily explained by the high temperature strain distribution characteristic figure brought up by author.

传统观点尚不能解释液化裂纹出现于熔合线处和裂纹很短的现象，用作者给出的高温应变分布图可很好解释。

It has been found that the depth of crack and fracture toughness of material can be expressed by weibull distribution, ratio of depth to length of crack and strength of material can be expressed by logarithmic normal distribution and normal distribution respectively.

对该管道主要随机变量的统计分析表明，裂纹深度和材料的断裂韧性表现为威布尔分布，裂纹深长比表现为对数正态分布，材料的屈服强度和拉伸强度表现为正态分布。

According to the maximum tensile circumferential stress theory ,using the ANSYS parametric design to program macro file, the break process of the engine suspending bearings is simulated.

根据最大周向拉应力准则，应用ANSYS参数化设计语言编写的宏命令程序，对发动机悬置软垫的断裂过程进行了模拟，得出了2种步长时裂纹前进的裂尖位置及相应的裂纹轨线。

In this study,the behaviors of deformation,microcrack initiation and short crack growth were investigated for 15MnVN steel.

对循环载荷作用下 15MnVN钢的显微组织变形、微观裂纹的萌生和短裂纹扩展过程进行了研究。

The breakage of particle is because of the development of the microcrack, which is caused by particle impact velocity and generalized size strength.

颗粒气流冲击破坏是由于其内部微裂纹的产生和繁衍所致，而微裂纹的产生和繁衍是其冲击速度和广义尺寸强度直接作用的结果。

Keeping metallurgical observation upon microcrack and making energy spectrum analysis of its top, we think that propagation of microcrack is across cr...

结果表明，对于大庆油田的井下油水介质环境来说，腐蚀对疲劳裂纹的形成不起明显作用，只对裂纹的扩展有一定的加速作用。

By use of the concept of domain of microcrack growth the damaged status of micocrack in rock can be described accurately and the problem about damage development of rock under any complicated loading pathes can be solved.

采用微裂纹扩展域的概念，准确地描述了岩石中微裂纹的损伤状态，解决了任意复杂加载路径下的岩石损伤演化问题。

The possibility of inner microcrack healing was studied by normalizing the 45 steel samples containing inner crack for one time and two times respectively.

对含有内部裂纹的45钢试样采取了不同温度一次加热正火处理和二次加热正火处理，研究了其内部裂纹愈合的可能性。

The reflection of plane Rayleigh waves from a single microcrack was modeled by FDM and provided an accurate estimation of crack depth.

有限差分法以某个单一的微裂纹为模型，产生平面瑞利波的反射，同时提供一个准确的裂纹深度的估计值。

At last, through the analysis of the T-stress, it is concluded that the T-stress plays an important role for the oriented microcrack cases. It is necessary to consider the effect of the T-stress in determining the shielding or amplification effect of the oriented microcracks.

最后，本文采用离散模型研究了各向异性材料主微裂纹干涉问题中T应力对主裂尖应力强度因子的影响：T应力对主裂尖应力强度因子的影响是不能被忽视的，这种影响不但与微裂纹的几何分布有关，而且还与T应力的大小和符号有关。

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。