失效分析

Indoor flexural fatigue tests are carried out, the results are analyzed and two types of double logarithm fatigue equation under different stress level andequivalent stress level are got. Using the fatigue equation, the fatigue performance of porous concrete and common semi-rigid base materials and cement concrete are compared, the fatigue stress coefficient which is used in the load stress calculation for porous concrete as undersurface of cement concrete pavement and the tensile strength structure coefficient which is used in the flexural stress check for porous concrete as base of asphalt pavement are obtained.

进行室内小梁弯拉疲劳试验，对疲劳试验数据进行分析，得出多孔混凝土不同失效概率下两种形式的双对数疲劳方程，利用疲劳方程，将其疲劳性能与常用半刚性基层材料和水泥混凝土进行比较，还得出了多孔混凝土作为水泥混凝土路面下面层荷载应力计算的疲劳应力系数，和作为沥青路面基层层底弯拉应力验算的抗拉强度结构系数。

Using the fatigue equation, the fatigue performance of porous concrete and common semi-rigid base materials and cement concrete are compared, the fatigue stress coefficient which is used in the load stress calculation for porous concrete as undersurface of cement concrete pavement and the tensile strength structure coefficient which is used in the flexural stress check for porous concrete as base of asphalt pavement are obtained.

进行室内小梁弯拉疲劳试验，对疲劳试验数据进行分析，得出多孔混凝土不同失效概率下两种形式的双对数疲劳方程，利用疲劳方程，将其疲劳性能与常用半刚性基层材料和水泥混凝土进行比较，还得出了多孔混凝土作为水泥混凝土路面下面层荷载应力计算的疲劳应力系数，和作为沥青路面基层层底弯拉应力验算的抗拉强度结构系数。

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粒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。

Based on the method of strength analysis, physical dimensions of PSP, i.e., winding angle, number of steel wires, diameter of steel wire, position of composite layer and wall thickness of PSP, are optimized. The cost can be decreased by 1.2% and 5.2% or burst pressure can be increased by 30.9% and 40.9% in virtue of optimization.

采用细观力学分析方法得到单层板主方向上的强度性能；比较不同的强度失效准则后，以最大应力强度准

Two sorts of failure form of the crane wire rope were analyzed.

本文分析了起重钢丝绳的两种失效形式。

On the basis of the above, the author discusses in detail the calculational method of reliability of frame structure failure-dependent engineering system t...

在此基础上，针对钢筋混凝土平面框架体系可靠度计算分析中的问题，重点阐述了可简化为剪切层模型的框架结构失效相关的工程系统的可靠度计算方法，提出了修正计算列式。

In general,this technique is used in the condition which is supposed that compone nts have dependent and definite distribution.However,in fact,no-binary state fau lt pattern often appear in variable systems.

但是，一般情况下的故障树分析都是事先假定元部件具有相互独立，确定分布的状态下使用，而在现实中，往往会出现非二态的系统失效模式。

Establish large deformation model of pipes under geologic disasters such as collapse and gulch; simulate and validate these formulas, and make certain of pipe' lapse length, and put forward some defendable suggestions.

基于弹性地基理论和弹性梁挠曲理论建立了埋管在坍塌/冲沟地质灾害作用下的变形微分方程，导出了大变形分析模型；以西气东输工程用管为例，由计算机仿真验证了公式适用性，确定了管道失效长度并提出了预防建议。

The numerical simulation result indicated that the deformation of protective erodent products film is relatively small, when the following conditions are satisfied, such as the fluid flows from the small inlet to large outlet, the concentric reducer and the relatively small difference of two end calibers of reducer.

以异径管冲蚀失效为例，运用多物理场耦合软件，分析了异径管流体流向、结构和规格对保护膜变形的影响，模拟结果表明：流向为''大进小出''的冲蚀较严重；偏心异径管比同心异径管冲蚀严重；两端管径差越大，冲蚀越严重。

On the base of the actual observation and theoretical analysis it was found that the primary reason which results in the failure of shells of hydromotor is due to the contact fatigue wear caused by the hertz stress at the starting points of the accelerated section.

在实际观测和理论分析基础上，认为多作用式液压马达壳体的失效是其加速段起点处最大赫兹应力多次作用形成的接触疲劳磨损。

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。