查询词典 crack

It has been found that although electrical failure was caused by solder joint crack, it was the underfill related failures that cause the solder joint crack.

在此基础上，揭示了倒装芯片封装的失效机理：焊点断裂是导致封装电失效的原因，而下部填充料中的损伤是引起焊点断裂的主要原因。

Specimens were observed for fracture lines and crack initiation by somatotype microscope and scanning electronic microscopy. The unfractured part was loaded in compression till crack, and the maximal failture loads were recorded and analyzed.

用体式显微镜及扫描电镜连续观察样本裂缝发生情况，对未发生裂缝的样本施加载荷直至碎裂，分析碎裂载荷值。

The complicated oil field of karst cave and crack are controlled by limestone reservoir and the crevices-cave system, which have many characteristics such as vivid and great in style, irregular distribution, the limestone cave in crack and unhomogeneity of rock etc.

笔者力求充分利用各种开发生产的动态信息，探索研究和评价储层特征的方法及思路，主要研究成果如下：(1)结合塔河油田动静态分析和实践，将缝洞型碳酸盐岩油藏划分为三类组合模型：缝-洞系统、双裂缝系统和缝孔系统。

Exerting surrounding pressure can prevent crack growing in a uniaxially compressed concrete specimen. The behavior of concrete in which there is no crack propagation (called ideal state without damage growth) is researched in this paper.

通过对混凝土施加围压，使单轴受压混凝土的裂缝发展受到限制，从而研究混凝土在接近无裂纹发展状态下的受压性能。

Instant electric field-induced domain switching, crack initiation and propagation in a poled BaTiO3 single crystal, as well as sustained field -induced indentation crack propagation and 90°domain switching in an unpoled BaTiO3 single crystal have been investigated in situ using optical microscopy.

金相显微镜原位观察了面内极化的BaTiO3单晶在瞬时电场作用下的畴变和裂纹形核、扩展的关系以及未极化BaTiO3单晶在恒电场下Vickers压痕裂纹扩展和电致畴变的关系。

A formula of the maximum crack width is given, which is based on a reasonable crack model.

在一个公道的裂缝模型的基础上，建议了钢筋混凝土受弯构件的最大裂缝宽度计算公式。

In the fourth part, by similitude of diagnosing diseases in medical practice, all available informations together with new measuring technique are collected for "sympton"of crack, with the above information a new branch of mathematics-fuzzy mathematics is utilized to judge whether there is any transverse crack in rotor shaft.

在第四部分中，借鉴医学上对疾病的诊断，总结了借助振动试验采集转子轴系裂纹信息的方法，提出了用电涡流测振仪测量转轴裂纹伩息的新方法。

This is totally different from the well known macroscopic fracture behavior, i.e., the blunting of crack tip due to significant dislocation activities around a crack tip.

这种新的破坏模式和人们以往的宏观材料破坏模式完全不同。

When sending an even electric current down the plate vertical to the crack line, the electric current was detoured near the crack tips for the existing of cracks and Joule heats was produced. The instantaneous high temperature formed the point heat source.

在通入垂直于裂纹的均匀电流作用下，由于裂纹的存在，裂纹尖端出现绕流现象，产生焦耳热，瞬时高温形成点热源。

But the concrete is non- one kind homogenizes the fragility material, under having certain temperature and humidity situation, the concrete is hardened and produced the volume out of shape, he is out of shape and inconsistent because of making up the material of the concrete, restrain from, produce initial stress each other, cause between aggregate and stone bonding surface of cement or cement produce the very small crack between the stone,These cracks are irregular, discontinuous too, under the influence of external factor, may also develop into a macroscopical crack.

但混凝土是一种非匀质脆性材料，在具有一定的温度和湿度情况下，混凝土硬化并产生体积变形，由于组成混凝土的材料其变形不一致，互相约束产生初始应力，造成在骨料与水泥石粘结面之间或水泥石本身之间产生微细裂缝，这些裂缝既不规则，也不连贯，在外界因素影响下，还可能发展成宏观裂缝。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。