疲劳的

The analysis and test results show that the concentration of stresses at the end of fillet welds between the tensile anchor plate and the tensile anchor tube is obvious, and the maximum principal tensile stress occurs in the stress concentration region.

结果表明，锚拉板与锚拉筒之间的连接焊缝下端部应力集中明显，最大主拉应力出现在该区域；在设计疲劳荷载作用下，该结构关键构造细节处均未发现疲劳裂纹，结构疲劳性能满足设计要求。

Experiments were conducted to determine the gigacycle fatigue behavior of cast Aluminum AS5U3G-Y35 by ultrasonic fatigue test system.

应用20kHz频率下的超声疲劳设备完成亿周次疲劳试验，获得铸铝AS5U3G-Y35超高周疲劳特性。

Base on the problem of large quantity fatigue loads on corroded R.C. structure and small quantity study of its mechanical property, bending resistance fatigue test of corroded R.C. beams is discussed in this paper. The influence of stress ratio and re-bar weight loss ratio on bending resistance fatigue performance of corroded R.C. beams are researched, and the relation between strains of corroded re-bars and fatigue life of beams are obtained. The main research contents and conclusions are as following: 1. Under the fatigue loads, the overstrain of concrete approximately coincidences three stages strain development and accumulation rule, and the mechanical property of concrete is deteriorated. The fatigue damage of concrete is accumulated. The overstrain of re-bars increases and the increase rate decreases.

鉴于实际工程中大量存在腐蚀钢筋混凝土结构承受反复荷载作用，但其力学性能研究不多的问题，本论文进行了锈蚀钢筋混凝土梁抗弯疲劳试验，研究了应力比和钢筋锈蚀率对锈蚀钢筋混凝土梁抗弯疲劳性能的影响，得出了锈蚀钢筋的应变与构件疲劳寿命之间的关系曲线，主要研究内容及结论如下：(1)在循环荷载下，混凝土残余变形基本符合三阶段变形规律，力学性能劣化，疲劳损伤积累。

Crus fatigue periostitis is a sort of familiar sports injury, including shinbone fatigue periostitis and fibula fatigue periostitis.

小腿疲劳性骨膜炎是一种常见的运动性损伤，包括胫骨疲劳性骨膜炎和腓骨疲劳性骨膜炎。

The results showed that most multiaxial fatigue cracks were initiated and propagated along the direction of maximum shear plane.

利用扫描电镜对疲劳试样的外表面和疲劳断口进行观察，研究了多轴疲劳裂纹萌生和扩展规律，发现裂纹基本上沿着最大剪切平面萌生和扩展。

The improved FASS is adapted for life assessment of LPG ship structure for the most dangerous spots in ship structure.

该系统从疲劳分析的基本原理出发，以疲劳累积损伤度公式为理论基础，可对船体结构进行疲劳寿命校核。

In order to describe the fatigue damage characteristic under multiaxial proportional and nonproportional loading, a new nonlinear multiaxial fatigue damage cumulative model was presented on the basis of combining multiaxial fatigue damage characteristic. The recurrence formula of multiaxial fatigue damage model was derived under multilevel loading.

为了描述多轴比例与非比例加载下的疲劳损伤特性，结合多轴疲劳损伤的特点，建立了一种新的非线性多轴疲劳损伤累积模型，并推导给出了该疲劳损伤累积模型在多级加载条件下的递推公式。

Tension-tension fatigue experiment was carried out at three different stress-level, the fatigue life and the S-N curve of the unnotched laminates were acquired.

进行了三种不同应力水平下的拉-拉疲劳试验，得到无孔试件的疲劳寿命及其S-N曲线；通过研究复合材料疲劳寿命预测的方法，建立了该无孔层合板剩余刚度疲劳累积损伤寿命预测模型。

The influence of welding residual stresses on the fracture characteristics of thesteel weldments with short-crack s was evaluated,and an attempt has been made to improve the fracture characteristics of the steel weldments with short-crack s by the application of surface treatment.

本文探讨了焊接残余应力对带短裂纹焊件疲劳断裂性能（疲劳裂纹萌生寿命、疲劳短裂纹扩展速率及疲劳总寿命）的影响，并通过表面锤击、表面喷丸处理，使焊件短裂纹处的残余应力得到有利调整，从而改善和提高了带短裂纹焊件的断裂性能。

The invention discloses a rotary bending corrosion fatigue test device. The device includes a rotary bending fatigue test device and a corrosion liquor supplying system; wherein, the rotary bending fatigue test device is used for mounting a test piece and applies bending load on the test piece during the process of driving the test piece to rotate and realizes the test on the fatigue data of the test piece. The corrosion liquor supplying system includes a liquor storage tank, a transfusion pump, a flow adjusting valve and a connecting pipeline. The corrosion liquor supplying system feeds the corrosion liquor to the test piece during testing in real time from an output opening.

本发明公开了一种旋转弯曲腐蚀疲劳实验装置，该装置包括旋转弯曲疲劳实验装置及腐蚀液供给系统，其中，旋转弯曲疲劳实验装置用于试件的装卡，并在驱动试件旋转过程中对其施加弯曲载荷，以及实现对试件疲劳数据的测试；腐蚀液供给系统包括储液罐、输液泵、流量调节阀及连接管道，腐蚀液供给系统通过其输出口实时向测试中的试件输送腐蚀液。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷