有裂纹的

In addition, the surface roughness of aluminum substrate has a remarked influence on cracking of anodic films.

此外铝合金基体的粗糙度对其表面氧化膜中的裂纹有很大影响，较为粗糙的表面，裂纹也较少。

The branch crack problems in a finite-width strip were solved by using the complex potential of a branch crack of half-plane, in which the distributed dislocations were assumed along all the branches arid one boundary of the strip.

假设沿分叉裂纹各分支和板条边界有某位错分布，利用半平面内分叉裂纹问题的复势函数，将板条分叉裂纹问题转化为半平面内的多分叉裂纹问题处理。

By the dynamic strain response test and its wavelet analysis of the driving axle housing models with and without prefabricated cracks respectively, the feasibility of the crack detection method which is based on the wavelet multiresolution analysis and the modern spectrum estimation is demonstrated.

通过对微型汽车驱动桥壳有、无预制裂纹模型试样在瞬态激励下的动态应变响应试验和小波分析，论证了采用小波多分辨分析和现代谱估计技术，通过对小波分解所得到的各尺度下细节信号的频谱分析，检测结构裂纹故障的可行性。

It is shown that preventing welding hot cracking by mechanical methods can avoid the limitation of metallurgical methods and is very effective both for solidification cracking and for liquation cracking, thus has more freedom in choice of the parent metal and filler metal.

研究表明，采用力学方法防止焊接热裂纹可以避免冶金措施的局限性，对两类热裂纹（即焊缝凝固裂纹和近缝区液化裂纹）同样有效，因此，对焊丝成分和母材的选取有较大的自由度，是一种解决焊接热裂纹问题的重要的新途径。

In order to know the character of them,the contact between them and the crack, and their forming process,we designed a special experiment- prefabricate crack in the shaped blank.

为了弄清此类异质颗粒的性质及其与裂纹之间的联系，以及具有该相同特征的裂纹组织的形成过程，特设计预制裂纹实验方案进行验证，通过试验研究，发现了异质颗粒的性质及其与裂纹之间的联系，判断出具有该相同特征的裂纹组织的形成过程，总结出了影响异质颗粒形成及大小的主要因素。

Using the perturbation method and Stroh's formula, a nonideal crack, which is mathematically sharp and the opposing crack faces still have a gap in which a stiffless dielectric fills, the two-field problem is reduced to a standard Riemann-Hilbert problem. The internal electric field distribution is obtained by solving a singular integral equation, and then the full field both inside and outside the crack is obtained and the electro-mechanical intensity factors to the first order of accuracy are given.

采用摄动方法对裂尖理想尖锐而裂纹面又具有一定张开的非理想裂纹进行分析，裂隙内含有无刚度的各向同性电介质，利用Stroh公式，将二域问题化为标准的Riemann-Hilbert问题，裂隙内电场分布通过解一个奇异积分方程获得，从而得到裂纹内外的力电全场分布，进而给出一阶精度下的力电强度因子的表达式。

The wavelet time-frequency features of the cracked rotor and the uncracked rotor were discussed, and the difference between them was presented.

将小波分析方法引入到裂纹转子时频特性研究中，得到了有无裂纹转子的小波时频特性，并讨论了它们的差别。

Weldable alloys have a composition that falls either well above or well below the maximum cracking sensitivity.

在所有可焊合金中，有某些合金的裂纹灵敏度远远低于极限裂纹灵敏度。

The conclusions are: The sonic velocity determined by the material's properties is the upper limit of the crack velocity; Bridging fibers plays a key role in increasing the composite's toughness and stopping the crack's propagation; The semi-infinite crack propagating in infinite region with the fiber bridging traction action is equal to the semi-infinite crack propagating in strip.

结论有：(1)由材料性能决定的音速是裂纹传播速度的上限；(2)桥联纤维在增韧复合材料和组织裂纹扩展中起了关键作用；(3)受桥联纤维力作用的半无限长裂纹在无限域中扩展等效于半无限长裂纹在带域中扩展。

During the cold correction for the hot-pressing tee joint P91 hydraulic machine made by Henan Petro-Chemical Machinery Plant,it is split into two pieces.

某热压三通P91用水压机进行冷校时开裂成两半，在断口上有一处裂纹缺陷，我们在裂纹缺陷处取纵向试样进行了化学成分、力学性能和金相组织的测定，找出了造成P91三通冷校开裂的主要原因，另外采用冷校工艺也不合理。

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。