First, it is pointed out that the damage law of evolution for high cycle fatigue advanced by Lemaitre is only applied to the loading of equal amplitudes on equivalent stress cycles.
首先 ,指出Lemaitre等提出的高周疲劳损伤演化方程只适用于等效应力循环为等幅的加载情形 。
Based on the modified Miner linear accumulative damage theory and S-N curve of drill sting,two parameters of fatigue damage in one stress cycle and fatigue accumulative damage strength of drill sting were defined.
基于修正的M iner线性累积损伤理论,结合钻柱的S-N曲线,定义了钻柱应力循环一次造成的钻柱疲劳损伤量和钻柱疲劳累积损伤强度,建立了钻柱疲劳累积损伤的计算方法。
A study of ratchetting behaviour under proportional and nonproportional cyclic stressing;
比例及非比例应力循环加载条件下的棘轮效应研究
The ratcheting and low-cycle fatigue (LCF) properties of the material were investigated in uniaxial cyclic stressing.
结果表明:非对称应力循环下产生的棘轮变形会缩短材料的疲劳寿命,材料在非对称应力循环下的低周疲劳寿命受到平均应力、应力幅值、最大应力和应力比等多种因素的影响。
Experimental study on shearing deformation behavior of saturated clay under cyclic stress;
循环应力下饱和黏土剪切变形特性试验研究
The cyclic stress?strain curves of ZA27 alloy with different treatment have been obtained in constant strain amplitude condition and the corresponding microstructure,the fractograyh obtained under different treatment condition are presented.
研究了ＺＡ２７ 合金在室温下的低周疲劳性能， 得到两种处理状态下ＺＡ２７ 合金在恒应变幅下的循环应力—应变曲线， 并对两种状态下合金的显微组织及疲劳试件断口进行了显微分析。
The cyclic stress strain properties of ZA27 alloy and ZCuSn10P1 at ambient temperature were studied in this paper The cyclic stress strain curves of them are obtainaed The results show alloy ZA27displayed the cyclic softing character.
本文对ＺＡ２７和ＺＣｕＳｎ１０Ｐ合金在室温下的循环应力应变特性进行了测试，得到了两种材料的循环应力应变曲线。
Bolted flanged connections are liable to failure, which work for a long time under the operating conditions that pressure and temperature change frequently By means of the application of the constitutive equation of gaskets to the load deformation equation of bolted flanged connections, a method to calculate the cyclical stress of bolts is put forward when the pre tightening conditions are know
将垫片本构方程应用于螺栓法兰连接系统的变形协调方程 ,考虑温度和介质压力的波动 ,提出了在初始预紧状态已知的条件下计算螺栓循环应力的方法。
By fixing the maximum values of tensile stress in all tests but changing the minimum values of tensile stress in various tests, the effect of cyclic stress amplitude or mean stress and their interaction on the damage of materials may be differentiated.
通过固定所有实验中最大拉伸应力值，而改变不同实验中最小拉伸应力值的方法，可区分循环应力幅或平均应力及其交互作用对材料损伤的影响。
This would result in about 1. 5 million variable amplitude stress cycles, assuming each truck produces one stress cycle.
假定一辆卡车产生一次应力循环，这将产生1．5百万次变幅应力循环。
However, the stud welding roots in the negative moment region of the beam are often subjected to the joint action of shear stress cycling of the studs and tensile stress cycling of steel girder flanges.
但在负弯矩处栓钉焊趾往往承受栓钉剪应力循环和钢梁翼缘拉应力循环的共同作用。
Additional stress cycles may result under some condition.
在某些情况下也可能产生附加应力循环。
Ratcheting behavior of AZ91D magnesium alloy under uniaxial cyclic stressing
单轴应力循环作用下AZ91D镁合金的棘轮行为
uniaxial stress and temperature cycling test
单轴应力-温度循环试验
endurance limit on base
对称的应力换向循环下的疲劳极限
Promoting Large-scale Corporation Reforger by Marketing Internal
火力发电厂在发展循环经济中的应用
Applications of Pressure Monitor and Level Detector in Cardiopulmonary Bypass
液位、压力报警器在体外循环中的应用
limited-pressure cycle
【机】有限压力循环
Analysis of Acceleration Factor Models of Thermal Cycle for Environmental Stress Screening
环境应力筛选中的温度循环加速因子模型分析
Characteristic Investigation of the Prestressed Concrete Beams under Cyclic Freezing and Thawing;
预应力混凝土梁在冻融循环后的受力性能研究
Cyclic Stress History Effects on Small-strain Shear Modulus of Silt;
循环应力历史对粉土小应变剪切模量的影响
The PDCA cyclic method application in prestressed pipe pile construction management
PDCA循环法在预应力管桩施工管理中的应用
Experimental Study on the Internal Recycle Gradientless Reactor Used for the Kinetics of Gas-Solid Reaction
内循环反应器用于气固反应的动力学研究
primary circular reaction
初期循环反应 初期循环反应
Experimental study on shearing deformation behavior of saturated clay under cyclic stress
循环应力下饱和黏土剪切变形特性试验研究
Dynamic Behavior and Application of Improved Lime-Soil of Subgrade after Dry-wet Cycles;
干湿循环后路基石灰改良土的动力特性及应用
Effects and Force Conditions of Enterprise Cycular Economy Development;
企业发展循环经济的效应及其动力条件