During fatigue loading stable crack growth was observed over the en-tire range of crack lengths investigated.
在疲劳加载中，裂纹扩展始终是稳定的。
A numerical simulation of stochastic damage evolution process in the condition of1ow cycle fatigue loading is discussed.
讨论一种低周疲劳下随机损伤演变过程的数值模拟方法。
It is proved by calculation that the model can describe well the performance of concrete under uniaxial and multiaxial monotonic loading and fatigue loading.
计算结果表明，该模型能较好地描述混凝土在单轴及多轴单调加载和疲劳加载下的性质。
The damage variable is defined as the residual strain of concrete under constant amplitude fatigue loading, and the law of cumulative damage and its evolution are obtained.
由等幅疲劳残余应变，定义了损伤变量，得到了相应的损伤积累和演化规律。
If the failure is defined as the final fracture of a component, then both S-N curves and crack growth rate curves reflect the fundamental material behavior under fatigue loading.
如果都把一个构件的最终断裂作为疲劳破坏的定义，则S - N曲线和裂纹扩展率曲线均是反映金属在疲劳载荷作用下的基本材料特性。
Test results demonstrated that digital image correlation method was effective, which could precisely measure the displacement and strain distribution in concrete under fatigue loading.
试验结果表明，数字图像相关方法具有可行性，能够有效地测量混凝土在疲劳荷载作用下的位移和应变。
Two dimensional fatigue loading under various working conditions is synthesized with weight coefficient method to obtain joint probability density function under multiple working conditions.
对各工况下的二维疲劳载荷，采用权系数的方法，合成并获得了多工况下的二维载荷联合概率密度函数。
This paper bases on a part of the project of National Natural Science Foundation "Failure criterion of concrete under multiaxial variable-amplitude fatigue loading" (50078010) for study contents.
本文是基于国家自然科学基金项目《混凝土多轴变幅疲劳破坏准则》(50078010)中的一部分作为研究内容。
During the experiment, the fatigue-loading was paused after fixed fatigue cycle and the white-light speckle patterns were acquired without loading.
在疲劳加载过程中，按一定的疲劳周次在零载荷状态下停机，并采集试件表面上预先制备的白光散斑图。
During the experiment, the fatigue-loading was paused after fixed fatigue cycle and the white-light speckle patterns were acquired without loading.
在疲劳加载过程中，按一定的疲劳周次在零载荷状态下停机，并采集试件表面上预先制备的白光散斑图。
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