The secondary impact acceleration pulse which is produced by the drop-test can influence the testing parameters and cause fatigue and damage of components.
凸轮式跌落冲击台产生的次冲击能够影响试件的测试参数和性能，并能造成试件的疲劳损伤与失效。
While fibromyalgia does not damage the joints or organs, the constant aches and fatigue can have a significant impact on daily life.
虽然纤维肌痛并不会损害关节或器官，但持续的疼痛和疲劳会对日常生活产生严重影响。
At first, small wave load have caused an amount of damage and decrease the ultimate bearing capability to the structures, then fatigue load have caused wholly destroy.
首先因较小的波浪载荷引起一定的疲劳损伤并造成极限承载能力的下降，然后因极限波浪载荷而引起结构的完全破坏。
Therefore, it is necessary to analyze the mechanism of the fatigue damage of bridge expansion device and estimate its fatigue life by theories and experiment.
因此有必要通过实验及理论研究等工作，对公路桥梁伸缩装置进行疲劳破坏机理分析和疲劳寿命估算。
Work can be a double-edged sword, in that it can stimulate brain activity, but at the same time long working hours can cause fatigue and stress, which potentially damage cognitive functions.
工作是一把双刃剑，既能够刺激大脑活动，同时过长的工作时间也会导致疲劳和压力，并有可能损害认知功能。
With the welding spot fatigue lifetime pre-estimation method, by combination of the finite element analysis and stress calculation, the welding spot fatigue damage under actual load can be calculated.
采用焊点疲劳寿命预估方法，通过有限元分析并结合应力计算，即可计算出实际载荷工况下的焊点疲劳损伤。
According to fatigue damage accumulation theory, test load of verified fatigue test on rail across beam and welded connections with integral joint of combined steel truss bridge was gotten.
依据疲劳损伤累积理论，确定了公轨两用钢桁桥轨道横梁与整体节点连接头验证性疲劳试验的试验荷载。
The photographs of the sweep electron microscope show that fatigue damage are caused mainly by microcracks and impurities of metal.
通过疲劳断口的电镜扫描试验，证明防爆膜的疲劳破坏是由存在于金属内部的微裂纹和杂质所引起。
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
Then, constitutive equations are written for plastic, creep and fatigue damage phenomena.
从而建立了塑性、蠕变和疲劳损伤现象的本构方程。
The paper points out that reed failures result from the synthetical action of vibrating wear, grain wear, fatigue damage and last, impact action-the most dreadful damage.
文中指出，钢筘的失效是振动磨损、磨粒磨损、疲劳破坏和冲击损坏综合作用的结果，其中冲击损坏的危害作用最大。
The paper points out that reed failures are resulted from the synthetical action of vibrating wear, grain wear, fatigue damage and last. impact action - the most dreadful damage.
文中指出，钢筘的失效是振动磨损、磨粒磨损、疲劳破坏和冲击损坏综合作用的结果，其如十击损坏的危害最大。
An anisotropic damage model for concrete subjected to compressive fatigue load is developed based on continuum damage mechanics and the concept of boundary surface.
基于边界面概念和损伤力学理论，建立了混凝土受压各向异性损伤模型。
The main classic fatigue cumulative damage theories and the representative definitions of damage variable have been introduced briefly.
简要介绍了经典的疲劳累积损伤理论和几个典型的损伤变量定义式。
The results show that fatigue, creep and oxidation damage always develops simultaneously during low cycle fatigue at high temperature.
试样的微观断口分析显示了在高温应变疲劳试验中同时存在疲劳、蠕变和氧化损伤。
It may decrease fatigue damage causing by rolling contact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track.
通过对钢轨的修磨可减少由于滚动接触疲劳引起的钢轨损伤，减少钢轨侧面磨损，可延长钢轨的使用寿命0.5 ~1倍。
Domestic and international research of fatigue damage mechanism, test technique and fatigue life prediction of inservice railway steel bridges is summarized and forecasted.
本文对目前国内外有关钢桥的疲劳损伤机理、检测技术及疲劳寿命预测的研究做了总结和展望。
Fatigue damage of ship and ocean engineering structures will caused by fluctuation loadings, such as wave loading, during their service time.
船舶与海洋结构物在其服役过程中受到波浪等载荷的交变作用而引起结构的疲劳损伤。
The damage evolutionary path and the damage equation which depicts the fatigue damage accumulation are introduced also in this paper.
文中给出了损伤演变路径和描述该损伤演化行为的疲劳累积损伤方程。
According to the correlation between accumulative damage and loading level the fatigue damage model is established.
依据损伤演变与损伤状态、加载条件间的相关性，建立了相应的疲劳损伤模型。
CONCLUSION: tendon can adapt to the exercise training, and there is fatigue damage in tendon during this adaptation process.
结论：肌腱对运动训练可发生适应性改建，在此过程中伴随着疲劳性损伤发生。
It is well suited for monitoring in line production in structural components for the aerospace about detection of damage and progressive fatigue damage.
从这个现象中获得的信息表明，它非常适宜应用到宇航结构件在生产线的无损检测和疲劳损伤预报。
The fatigue life and cumulative damage of ammunition feeding spring in automatic naval gun of medium calibre have been analysed.
本文研究了中口径自动舰炮输弹簧的疲劳寿命及损伤规律。
In order to ensure structural safety in the design working life, it is necessary to carry out integrity analysis of fatigue and to evaluate the degree of fatigue damage on the structure.
为了保证结构在设计寿命期内的安全使用，有必要对结构进行整体疲劳分析，评估其在设计年限内的疲劳损伤程度。
The practically used method of how to evaluate the accumulated fatigue damage and residue fatigue life is introduced.
提出了疲劳累积损伤度和剩余疲劳寿命的实用计算方法。
But the common linear fatigue damage cumulative rule neglects the fatigue damage which is brought by the high frequency and low stress.
一般的线性损伤累积理论忽略了高频率低疲劳应力所引起的构件疲劳损伤，致使预测结果与实际寿命相差很大。
But the common linear fatigue damage cumulative rule neglects the fatigue damage which is brought by the high frequency and low stress.
一般的线性损伤累积理论忽略了高频率低疲劳应力所引起的构件疲劳损伤，致使预测结果与实际寿命相差很大。
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