查询词典 crack up

Based on the work flow of charging equipment, three worst work conditions of the clack box were defined. Then, based on thermal-structure coupled theory, the thermal-structure coupled of the clack box which suffered from mechanical and temperature load was analyzed using the powerful software ANSYS. The clack box's temperature field and stress field as well as the stress spectrum of danger area in actual working condition were obtained. Finally, based on crack initiation and crack extension theory, the clack box's fatigue life was predicted.

摘 要：根据装料设备的工作流程，确定阀箱3种最不利的载荷工况；基于热－结构耦合理论并利用有限元分析软件ANSYS研究阀箱在温度载荷和机械载荷作用下的热－结构耦合问题，得到实际工况下阀箱的温度场、应力场以及危险部位的应力谱；依据裂纹萌生和扩展理论对阀箱进行疲劳寿命预测。

According to the structure of terrane and exploring water result of coal floor disclosed by hydrology drill hole,it is demonstrated that there exists strong relationship among abnormal apparent conductivity, crack in rock stratum and the extent of filled water in crack,an.

应用音频电透视技术，分析了杨村煤矿2702工作面底板30 m和50 m深度界面的探测成果，并与井下水文钻孔揭露的煤层底板岩层结构及探水结果对比研究，发现音频电透视探测的煤层底板综合视电导率高异常与岩层的裂隙性及其充水程度具有很强的关联性；岩层裂隙与含水层连通性良好部位明显显现视电导率高值异常，结果表明，音频电透视探测成果能够综合反映底板岩层的阻水条件。

The result of SSRT showed that the tensile strength in fusion zone of LBW weldment is higher than base metal, and the IGC in weld decay zone did not crack because of the stretch;IGC in fusion zone of GTAW weldment leads to early fracture, and the IGC in weld decay zone clearly stretched and cause the material to crack. Intergranular stress corrosion cracking in this section is still possible.

慢应变速率拉伸试验结果，LBW焊件之焊道强度高於母材，且於焊接衰化区所造成之沿晶腐蚀并未因拉伸造成开裂；GTAW焊件的焊道沿晶腐蚀导致断裂提早发生，且在焊接衰化区的沿晶腐蚀明显拉伸造成开裂情形，仍有在此区域发生沿晶应力腐蚀破坏的可能。

For wire bonding,we got methods to avoid low-k material layer crack and IMC crack by gold wire selection,capillary design optimization,and wire bonding process window study;Wire sweep issue was declined,after use reverse wire bonding technology to get low wire loop,define high wire loop and low wire loop between neighbour wires to reduce wire cross and split transfer course into several segments by different transfer speed to control mold flow;For molding and to different packages,as a physical method,add suitable presser during different cure process,it can reduce warpage value;As chemical methods,optimized component of molding compound or added flexiblier,it can decline thermal stress and warpage.

在引线键合方面，通过对不同纯度金线的选择、劈刀设计的优化、以及对引线压焊工艺窗口的研究，找到了可降低焊盘碎裂，金铝间化合物分层等问题的方法；通过使用反向压焊来控制线线弧高度和在邻近线间使用高(来源：A7aB4848C论文网www.abclunwen.com)低线弧来控制线弧以及模塑注塑速度细分化的方法，有效降低了冲线值；在模塑方面，针对不同封装形式，通过封装模块在烘烤过程中优化外加压力的时机，利用物理方法有效减低了翘曲；此外从化学角度出发，通过对模塑材料配方的优化以及添加应力释放剂，有效降低了封装内的热应力，减小了封装模块的翘曲。

By measuring the residual stresses of the cylinder of a cement ball mill in four cases,and the fatique crack spreading for the thermal treatment and the un thermal treatment test samples,the results showed that the heat treatment sample reduced the residual stress,enhanced the fatique strength and lowered the crack spreading speed.

对球磨机筒体的4种情况的焊件进行残余应力测试，并对进行热处理和未进行热处理的试件做疲劳试验及疲劳裂纹扩展测试。试验结果表明：经过热处理的试件，残余应力降低，疲劳强度提高，裂纹扩展速率降低，结构抗疲劳性能增强。不过从工程应用角度看，对于板厚为20～25mm的球磨机筒体而言，不进行焊后热处理也能保证足够的疲劳强度

In thermal cycling, electrical resistance of solder joints in daisy chain configured assembly was measured. At the same time, a variety of failure analytical tools were employed to inspect the damages in the assembly including solder joint crack, underfill delamination and crack.

在加速试验过程中，测量电参数的同时，利用多种失效分析方法详细研究了封装中的缺陷和损伤，如焊点和下部填充料中的裂缝、以及下部填充料与芯片之间的分层。

The pH value and electrode potential at crack tip are decreased along with crack growth.

当裂纹长度一定时，裂纹内的pH值和金属电极电位都随着裂纹深度的增加而单调降低。

This dissertation mainly discusses the control of temperature stress in mass concrete baseplate in the foundation of the building. By studying the effects of temperature stress of a variety of factors and Reinforced Crack configuration, control crack of mass concrete baseplate.

本文以大体积混凝土底板结构施工中的温度应力和温度裂缝为研究对象，通过研究影响温度应力的多种因素及通过配置抗裂钢筋来达到控制温度裂缝的目的。

A full of strain energy accumulates in the top of blasting crack; and the mode of caustics of latter crack is close to the common dynamic caustics.

初步提出了爆炸裂纹的大部分扩展是应变能释放的动态卸载破坏的结论。

Based on fatigue curve in the crack initiation process,a numerical method to compute the fatigue crack extension ,is proposed.

在进行岩石类材料疲劳断裂破坏的数值分析时，将损伤力学将裂纹形成与裂纹扩展两个过程有机结合在一起。

He's a pretty westernised kind of guy.

他是一个非常西化的人。

National spirit is the moral kingpin for a nation to realize common ideal and goal.

一、中华民族精神的基本内涵党的十六大报告指出：在五千多年的发展中，中华民族形成了以爱国主义为核心的团结统一、爱好和平、勤劳勇敢、自强不息的伟大民族精神。