裂纹

Adopt the round activity valve seat,seal the surface and weld and set up the hard alloy very much with the department,go into stress heat treatment,make it when run under the reversal operating mode of the hot stress,sealing the surfacedoes not produce full of crackswith the crackly.

采用了圆形的活动阀座，密封面焊以司太立硬质合金，并经去应力热处理，从而使之在热应力交变工况下运行时，密封面不产生龟裂和裂纹。

The nanocrystalline TiO_2 films were integral and crack-free with small pores, whose crystallitic sizes were nanometer and even.

结果表明，所制备的TiO2薄膜表面完整，无明显的裂纹，颗粒分布均匀，粒径和膜厚度保持在纳米级。

On the basis of the elastic-plastic analysis of the crack tip zone under cyclic loading, suggested by Rice, the general expression for the delayed retar- dation parameters and the delayed retardation formula, containing the four parameters, were proposed by using Matsuoka model.

基于Rice对循环加载下裂纹尖端的弹塑性分析，按照Matsuoka模型理论，提出了迟滞参数的一般表达式和四参数迟滞公式，并对本文的试验结果及Matsuoka的试验结果进行了分析讨论。

During the process of correct installation and application, there will be no cracks, decolorization or falling-off.

在正确的安装使用过程中不会产生裂纹，绝对不会脱色或小片脱落。

As done in classical fracture mechanics, a circumferential crack with macroscopic geometrical dimensions is necessary, mean while setting energy release ratio as a control parameter of delaminate fracture.

即，假设在环向存在具有宏观尺寸的贯穿裂纹，环向变形作用相当于弹性基础上的梁。并以能量释放率作为断裂研究的控制参量。

It studied many factors such as blank holder pressure, anti-pressure, clearance between punch and bottom die, and parameters of dentiform on blank holder, analyzed the influence of these factors' change to stress and strain field in distortion area and the appearance of shear crack, summarized the appropriate ratio of blank holder pressure and anti-pressure, and the best range of other factors.

从压边力、反压力、相对冲裁间隙、压边圈齿形参数等各种因素出发，分析了这些因素的变化对于变形区应力应变场与剪切面裂纹产生的关系，并得出了压边力与反压力的合适配合比例，以及其他参数的正确取值范围。

The results showed that dentinal tubule orifices were better closed under 56~111 J/cm2 energy output and no crater or fissure was found.

结果证实56~111 J/cm2的能量，就能较好地封闭牙本质小管口，并且不会产生大的凹坑及裂纹。

Outer wall defect of building, such as desquamation of facing and extending crack, on one hand, will cause accident; on the other hand, indicates existing inner hidden trouble.

建筑物外墙的破损，诸如饰面剥落和延伸裂纹，一方面造成意外事故发生，另一方面表明有内部隐患存在，如不及时采取措施，可能造成极为严重的后果。

Based on analyzing the dilatometric curves, metallographic structures of test samples of these simulation procedures, four factors which have influences on the tendency of the appearance of the cold cracks in HAZ have been studied, these factors are preheating, slow cooling, expanding the cooling time (t8/5 and t8/3), and heat preservation.

通过对这些模拟过程的热膨胀曲线、试样金相组织等的分析，研究了焊前预热、焊后缓冷、延长冷却时间t8/5与t8/3、焊后保温这四种因素对焊接热影响区冷裂纹产生倾向的影响。

The movement and volatilization ofthe small molecular which produced by the discomposing of the SBS as well as thecontinuous degradation of SBS is also retarded. The thermo-stability and anti-thermooxidative aging properties of the composites are enhanced.

磨盘剪切力场增加了PP与有机蒙脱土的界面结合，由塑料包覆粘土片层的复合分散相具有模量梯度和结构梯度，能较好地传递应力并阻碍裂纹的扩展，提高了材料的强度。

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。