失效分析

Progressive failure and hygrothermal effect s was investigated by numerical method.

对湿热环境下考虑累积失效和分层损伤的先进复合材料格栅加筋结构的稳定性进行了数值分析。

By studying and summing up the common failure physical models and combining with the quantum mechanics theory on the relationship between the electronic equipment aging reaction rate and tempreture-humidity,a hygrothermal aging life model for solid propellant storage and usage is established with the propellant mechanical properties as the research object.

通过对常用失效物理模型的分析和总结，结合量子力学理论关于电子产品老化反应速率与环境温、湿度的关系，以推进剂力学性能参数为研究对象，建立了固体推进剂贮存使用寿命的湿热老化模型，并通过试验数据拟合得到具体的经验公式。

The results in this paper are concluded as follows:(1) Rolling contact fatigue has been used to examine the interfacial reaction products and study the mechanism of ion beam intermixing effect on the adhesion of Cr-N coating on steel by IBAD.

对多次冲击条件下薄膜的失效抗力及其与薄膜力学性能之间的关系进行了初步探讨，得到如下结果：（1）用滚动接触疲劳法检测离子轰击导致的界面反应产物和研究离子束共混对钢基体上IBAD沉积Cr-N薄膜结合强度的影响本质，结果表明，滚动接触疲劳能有效地分析界面最薄弱位置和评估界面反应产物，滚动接触疲劳引起的剥落可作为研究界面反应产物对结合强度影响的根据。

On the basis of examination of the wear behavior and worn surface morphology of the coatings after abrasive wear and erosion wear respectively, and the enhancing mechanisms of interlamellar bonding caused by unmelted carbide particles during deposition, the effects of the microstructure on its performance are discussed.

其次， 在分析研究了涂层磨拉磨损和冲蚀磨损失效形貌以及未熔化碳化物颗粒对涂层层间结合强化机理的基础上，探讨了磨损机制、磨损模型的建立及涂层结构对磨损性能的影响规律。

The result shows that the reliability model developed provides a reference to the reliability design of wire cables with dependence failure revealable.

研究表明，所建立的钢缆类并串联系统可靠性模型能够为钢缆的可靠性分析提供依据，并且能反映相关失效的影响。

After obtaining spot actual measurement to concern data, consider actual reliability index and wear be no longer in force multiple standard, use formula of rustily craze computation, undertake to structural component part carbonization reliability is analysed, cast life of carbonization of its the rest, can mix by qualitative analysis evaluate structural dependability, upgrade to cast life of its the rest for ration.

在取得现场实测有关数据后，考虑实际可靠度指标和耐久性失效多重标准，利用锈蚀开裂计算公式，对结构构件进行碳化可靠度分析，猜测其剩余碳化寿命，可由定性分析和评估结构可靠性，升级为定量猜测其剩余寿命。

Starting from the basic concept and principle of reliability theory, some methods of reliability analysis and calculation for structural members and systems are discussed in seme detail m this paper, On the basis of others'research achieements , the method for calculating the reliabillity of continuous PPC girder bridge system is deduced from the probability of failure,In accordance with the test resuIts of 14 two-span continuous PPC model beams , obtained from the rescarch project,A study on the plastic ...

本文从可靠度理论的基本概念和原理出发，主要论述了结构杆件和系统可靠性分析和计算方法。在前人研究的基础上，利用失效概率推导出连续梁系统可靠指标的计算方法，本文还根据高等学校博士学科点专项科研基金资助项目《大跨度预应力混凝土桥塑性行为的研究》所进行的十四片两跨混凝土连续梁桥模型试验的数据算出各梁承载能力的系统可靠指标。

The effect of TiC coating in electrode tip surface on spheriform electrode degradation during resistance spot welding zinc coated steel was investigated by SEM,EDX and XRD.

利用SEM、EDX和XRD等方法分析了在点焊镀锌钢板时球形电极表面熔敷TiC涂层对电极失效的影响。

In theoretical analysis, both of 1/f noise and these failure can be attributed to the same defects, such as oxid traps, dislocation and metallic impurity in p-n junction, and weak-bond states near Si/SiO〓 interface etc.

理论分析表明，1/f噪声与这些失效模式可归因于相同的潜在缺陷，如氧化层陷阱、p-n结耗尽区内的位错和重金属杂质、Si-SiO〓界面附近的弱结合键态等。

Through analysis,the failure reason was confirmed as that the low cycle fatigue caused by plastic deformation occurred in the lead alloy,thus the fracture occurred.

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。

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。