查询词典 crack

It is found that,there are two types of interfacial cracking patterns of the ceramic coat: in the cooling process, mode Ⅰ is vulnerable to crack at the peak position of the cosine curve, and mode Ⅱ at the middle position; in the heating process, interface edges are introduced into the ceramic coat/substrate system as a result of the vertical cracks emergence, and the ceramic coat will transversely crack at these positions because of the stress concentration effect.

计算时对陶瓷层材料分别按理想线弹性本构和黏塑性本构模型开展了模拟。分析发现，陶瓷层的界面开裂存在两种模式：在降温过程中，陶瓷层容易出现界面波峰处的Ⅰ型开裂与腰部位置处的Ⅱ型开裂；在升温过程中，陶瓷层容易发生垂直开裂使结构中出现陶瓷层/基体的界面端，界面端部严重的应力集中效应使陶瓷层容易在该处横向开裂形成界面处的边裂纹。

The curve of fatigue crack growth rate is calculated, and the behavior of fatigue crack growth is simulated.

计算了疲劳裂纹扩展速率曲线，模拟了疲劳裂纹的扩展行为。

Quenching crack propagation characteristics of the organizations on both sides without decarburization phenomenon significant difference between crack and materials and forging cracks.

淬火裂纹的组织特征是裂纹两侧无脱碳现象，明显区别与锻造裂纹和材料裂纹。

In situ SEM observations have revealed that fatigue crack propagation is caused by the shear band decohesion around the crack tip and the formation and cracking of the shear band is mainly caused by the plasticity generated in the loading part of a load cycle.

论文摘要： In-Situ SEM的研究揭示了疲劳裂纹的扩展是由裂纹尖端附近的剪力区散屑和生成热引起的，而剪力区裂纹主要是在循环负载下受载部位产生塑性变形引起。

In order to study the fatigue of pressure vessel commonly encountered problem in engineering with large destructibility , based on the theory of fracture mechanics , the pressure vessel existing original crack was equivalent to the problem of infinite flat with center crack .

为了分析工程中常见的破坏性极大的压力容器疲劳问题，基于断裂力学理论将存在初始裂纹的压力容器等效为无穷远处作用均匀拉应力的含中心裂纹无限大板问题，解出表面半椭圆裂纹和穿透裂纹的应力强度因子；利用断裂判据得到裂纹的临界断裂尺寸；采用Paris表达式对裂纹扩展速率进行描述，推导出初始裂纹在不同裂纹尺寸和形式下的裂纹疲劳扩展寿命。

Based on genetic neural network and modal strain energy, a two-stage method for detecting diagonal crack s is proposed to identify the location, angle and depth of diagonal crack s in beams.

基于遗传神经网络与模态应变能，提出了一种斜裂缝两阶段诊断方法，识别梁体中斜裂缝的位置、角度和深度。

When crack propagation meet with mass with great strength, the direction of crack propagation will deviate from the particle with high strength.

即当裂纹扩展时遇到较强的介质时，裂纹的扩展方向会发生偏转，并绕过强介质继续扩展；较弱的介质和已贯通的裂纹组对其它组裂纹的贯通有屏蔽作用。

After the initiation of crack, the crack propagating of alloys with 0.5%Ce addition is accelerated evidently because of the appearance of needle rear earth rich phases which dissever the matrix and lead to the decrease of mechanical properties and thermal fatigue resistance.

加入0.5%Ce的合金在裂纹形成后期扩展速度明显加快，这是因为合金中出现针状富稀土相，这种针状相割裂了基体，使得合金力学性能降低、热疲劳抗力下降。

Utilizing plane sectorial domain Hamilton system function via variable substitutes and eigenfunction expansion method, an analytical element is proposed in this paper for the crack analysis of reinforced concrete structures combining the bridging model and Dugdale model. Combined with finite element, nolinear crack problems of reinforced concrete structure can be analyzed.

利用平面扇形域哈密顿体系方程，通过分离变量法及共轭辛本征函数向量展开法，结合Dugdale模型和桥联力模型，推导了钢筋混凝土结构裂纹尖端的解析元列式，将此解析元与普通有限元结合，可用于分析钢筋混凝土的非线性断裂问题。

Analyzing the causes of surface crack of GCr15 bearing steel wire with metallurgical microscope, Brinell and Vickers Durometer, the result shows that the surface of wire rods has no crack, which comes from the course of drawing .

运用金相显微镜、布维氏硬度仪等分析手段，对GCr15轴承钢盘条经拉拔成钢丝后成品表面产生间断裂纹进行分析，结果表明盘条表面无裂纹，成品钢丝的裂纹主要产生于拉拔工艺过程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了