失效分析

Results show that the servic.e life of TiB2/Cu electrode with a TiB2 content of 1.5 wt% reaches 7700 weld spots, which is 4 to 8 times that of Cr-Zr-Cu electrode materials when coated steel sheets are spot welded; the service life of the composite electrode reaches 30000 weld spots, 2 to 3 times that of Cr-Zr-Cu electrode materials when conventional carbon steel sheets are spot welded.

对 T i B2增强铜基复合材料作点焊电极点焊镀层钢板时的失效进行了分析，结果表明：含TiB2为1.5wt％的铜基复合材料作电极，焊接镀锌钢板的使用寿命约为7700点，是普通电极材料Cr－Zr－Cu的4～8倍，焊接普通钢板的使用寿命约为30000点，是普通电极材料Cr－Zr－Cu的2～3倍。

By means of dissection,the fracture was found at the cross of strap and post.

分析其失效原因为铅合金在外力作用下，产生塑性变形引起的低周疲劳，造成断裂。

Firstly,a state-of-the-art survey of hybrid FRP-concrete beam/deck systems is reviewed from the aspects of the main composite forms and their studies.Secondly,three typically analytical methods and three types of optimized failure modes and their corresponding ductility for hybrid FRP-concrete be...

文中首先从主要组合形式及其相关研究等方面回顾了FRP-混凝土组合梁/板系统的国内外研究现状，其次介绍了FRP-混凝土组合梁/板系统的3种常用分析方法和3种优化失效模式及相应的延性特征，接着列出了FRP-混凝土组合梁/板系统在国内外桥梁工程中的具体应用，最后探讨了该组合系统在今后研究中需要解决的一些问题。

Based on finite element dynamic model of expansion casing with rubber sleeve, casing deformation and stress change inside casing, contact pressure at both sides of rubber sleeve and expansion parameter changes caused by friction factors during the expansion are analyzed.

根据带有橡胶筒的膨胀套管有限元力学模型，对套管膨胀过程中橡胶变形和套管内的应力变化、橡胶筒两侧的接触压力，以及摩擦因数引起的膨胀参数变化等做了分析研究；对橡胶筒的厚度、长度做了定量和定性分析，发现在橡胶与套管之间的接触摩擦因数作用下，橡胶过长将会在纵向产生&堆积&现象，在有限空间中，使其受较大的接触压力而失效。

The service condition,the strained status and the failure form of the grinding balls in mill were analyzed and studied.

对球磨机中磨球的工作情况、受力情况及失效形式进行了分析研究。

The first guard line is a proactive intrusion response method based on intrusion graph, which can make proactive reactions in the forepart in order to prevent the final attacking goals from realizing, furthermore, to protect systems security. The second guard line is an intrusion response method based on damage containment techniques. This guard line will contain damaged data quickly and precisely, then release correct data contained mistakenly just now, which can maintain basic service functions for legal users even though intrusion response has been disabled.

一方面，利用基于入侵攻击图的先应式入侵响应方法，在检测到入侵行为的前期进行防御，在入侵者的攻击目的完全实现之前给予响应，尽量阻止其攻击目的的实现，并采用博弈方法进行策略分析，使系统的响应成本达到最低；同时利用基于数据破坏隔离技术的入侵响应方法作为第二道防线，在前期的入侵响应失效、关键数据已经被破坏的情况下，利用破坏隔离技术精确定位被破坏的数据并迅速释放被误隔离的数据，最大限度地提高数据利用率，从而保证系统向用户提供不问断的服务。

In this paper, the purpose, intension, application approach and long term potential of restoration heat treatment technique is analyzed in detail.

具体分析了修复热处理的技术内涵及应用途径，并对修复热处理的目的及内容进行了概述；重点讨论了材料失效机理和作为修复热处理基本原理的材料自愈合和自修复机理，并对修复热处理的基本方法和应用进行了简单介绍。

Kempers' study , the more layers the mesh screen type had, its resistance against gravity was higher, but its heat resistance and flow resistance were comparatively augmented. As mentioned in the preceding paragraph, it is extremely difficult for a single micro structure based on any of the three types to possess both low flow resistance and strong capillary force. Faced with this fact, the researchers have tried to mix the three micro structures in Table 2 into as many combinations as possible so that a composite micro structure with low flow resistance and great capillary force may be fabricated. After a thorough analysis, the groove combined with sintered metal or mesh screen has been found to be a better alternative. However, the groove combined with sintered metal will raise the flow resistance of the channel, and the aluminum substrate employed in this research cannot be sintered into a micro structure. As a result, the groove combined with mesh screen is finally chosen as the composite structure to enhance its capillary force and at the same time maintain its high permeability. In this way, the heat pipe will not fail due to the working angles.

Kempers 的研究当中提到，当网格结构越多层时，其对抗重力的能力也越强，但相对的其热阻以及流阻也越高，就如同前段所述，我们很难在单一结构当中找出一流阻低且毛细力之微结构；因此本研究便以表2中之三种微结构进行组合，找出一低流阻且毛细力强之复合式结构，经分析发现，沟槽搭配烧结以及沟槽搭配网格为较佳之组合方式，但由于烧结搭沟槽构造将会提高流道之流阻，且本研究使用铝做为基材，并无法使用烧结最为其微结构，故将采用网格搭配沟槽之复合式结构提高结构的毛细力，并维持沟槽结构的高渗透性，解决因角度造成热管失效的问题。

Those all accord with the real status of metal-cutting process. So a w...

论文结合刀具磨损机理，找出了刀具失效的薄弱环节，为进一步深入分析刀具切削状态和涂层改性提供了一定的理论依据和指导。

The process and the features and the main reasons of the improper fatigue fracture of tubing are found, through the macroscopic and the microscopic observation on the tubings fractured face, and stress analysis in the root of tubing thread, that is, tightening up or loosening screw with heavy torque for many times and thread size not accurating to API standard make thread root of dangerous section high stress level.

本文通过对油管断口的宏观和微观形貌的深入观察与分析，获得了有关断裂失效发生和进程方面的各个信息，全面掌握了油管疲劳断裂的征象。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。