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The fatigue tests of concrete on biaxial tension-compression under constant -amplitude cyclic loading with constant confined stress are described in this part of the thesis.

总结了混凝土边界面模型发展的历史及其基本概念，分析了混凝土边界面模型构建的一般方法。

Constant amplitude reversed cyclic load tests were simulated with the aid of software ANSYS/Fatigue, so that to obtain the used coefficient of fatigue life.

本文使用ANSYS/Fatigue软件进行了常幅偏移下的性能分析，来获取结构的疲劳寿命使用系数。

It is shown that the shear strength of expansive soil decreases with increasing number of cycles and finally reaches to a constant state. The value and cyclic number of the constant state reduce with increase of amplitude of variation of water content.

研究结果表明：膨胀土抗剪强度随干湿循环次数增加而衰减，最终趋于稳定，强度稳定值与稳定时所需循环次数均随含水率变化幅度的增加而减小。

Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years.

飞机结构日历寿命的确定与腐蚀环境对飞机结构寿命的影响紧密相连，材料抗疲劳性能随日历年限的变化规律和腐蚀环境作用后的疲劳累积损伤理论是科学地确定飞机结构日历寿命的基础。

The results show that:there are obvious cyclic creep behaviour during constant stress amplitude low-cycle fatigue in 62Sn-36Pb-2Ag surface mount solder joints.

研究了表面封装焊在剪切应力作用下等温低周疲劳特征，得到疲劳寿命与循环应力幅的关系曲线。

The deformation characteristics of granite under constant amplitude cyclic loading were studied with multi-function apparatus RMT-150B.

摘 要：利用RMT-150B岩石力学多功能试验机，对花岗岩进行常幅循环加载试验，研究循环加载过程中岩石的变形特性。

Constant amplitude reversed cyclic load tests were simulated with the aid of software MSC/Fatigue. Fatigue life predictions can be made for this class of connection using relationships analogous to the well-known Manson-Coffin strain-life equation for metals.

本文使用MSC/Fatigue软件进行了常幅偏移下的性能分析，类似于著名的Manson-Coffin公式，建立了所研究节点的塑性转角和寿命的关系。

This study consists of three parts. Firstly the equivalently accelerative corrosive environment is determined through the analysis of statistic data of corrosion environment. Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years. Four S-N curves with different corrosive time are obtained based on the fatigue experiment. Finally the regression method of S-N curves for experimental data is researched and a weighted least square fit is put forward in which the weigh of a group of test data is inversely proportional to the length of the confidence interval.

进行了以下几个方面的工作：(1)通过实测、统计、分析得到了当量加速环境谱；(2)完成了在当量加速环境谱下预腐蚀日历年限0年、3年、8年和13年的腐蚀试验，并进行了成组常幅疲劳试验，得到了不同预腐蚀年限下的S-N曲线；(3)进行预腐蚀后的S-N曲线的数据拟合方法的研究，提出了考虑置信区间长度影响的加权最小二乘法。

Signal integrity problems mainly refers to the signal overshoot and damped oscillation, which is mainly driven IC transition amplitude and a function of time.

信号完整性问题主要指信号的过冲和阻尼振荡现象，它们主要是IC驱动幅度和跳变时间的函数。

The transient term is an oscillation of damped natural frequency , of which the amplitude decays according to .

瞬态项以阻尼自然振荡频率振荡，其幅值以衰减。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。