累积塑性应变能随着加载频率及应力水平的增加而增加，与疲劳寿命在半对数坐标下呈线性关系。
The cumulative plastic strain energy increases with the increase of the loading frequency and stress level, which is linear with fatigue life on semilog coordinate.
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.
以不同应力水平下的破坏率相等进行损伤等效转换出发，建立了新的非线性累积损伤模型。
A new non-linear accumulate damage model was derived from the concept of equal failure probabilities under different stress levels.
在频域内分别用等效应力法和等效窄带法计算了累积损伤。
The accumulated fatigue damage was calculated in frequency domain by equivalent stress method and equivalent narrow band method respectively.
推荐了一种应变损伤累积模型，能够考虑单向板面内多轴应力和平均应力的影响。
A cumulative damage model is proposed, which can be used to consider the influence of in plane bi-axial stresses and mean stress on the fatigue behavior of unidirectional laminates.
获得了用电阻变化测量疲劳损伤的公式，应用计及疲劳极限和循环应力幅影响的非线性累积疲劳损伤模型，给出了金属材料疲劳损伤的剩余寿命预测公式。
By using the nonlinear cumulative fatigue damage model considering the influence of the fatigue limit and the cyclic stress amplitude, the remaining life formula of the.
而且，证实建立在某种试验应力状态下饱和软粘土循环强度和循环累积变形的变化规律，可以推广到一般应力状态下。
And the changing laws of cyclic strength and cyclic accumulate deformation built on certain test stress states have generality and can be used in general stress states.
对用于分析步进应力加速寿命试验的累积损伤模型进行时间变换，保留模型对数据拟合的灵活性的同时简化了数学计算。
The time-transformation of the cumulative exposure model used to analyze step-stress accelerated life testing simplifies the mathematical mode without sacrificing flexibility for fitting data.
在对裂尖弹塑性应力应变分析的基础上，作者建立了疲劳裂纹扩展的应变累积模型。
Then, the strain accumulation model of EPFC growth is presented based on an analysis of elastic-plastic stress and strain at the crack-tip.
结果表明，在不同应力水平下，推进剂的累积损伤基本符合线性累积损伤规律。
The results show that the cumulative damage of propellants under the different stress levels agrees with linear rule.
该模型综合了变形、能量累积以及荷载历程对预应力混凝土构件损伤-破坏的影响，对不同的地震模式有更好的适用性。
This model synthesizes the effect of distortion, energy accumulation, and loading history to damage-failure of prestressed concrete member, thus may be applied to different earthquake patterns.
结果显示，循环载荷试验加载水平与循环次数的增加会造成残余应力的进一步累积。
The results show that the residual stress of pile is further accumulated in the cyclic loading tests as the number of loading cycles and the level of cyclic loading increase.
在上海地区典型饱和软粘土不排水循环三轴试验的基础上，分析了影响软粘土塑性累积变形的主要因素：循环荷载的作用次数，初始静偏应力和循环加载动偏应力。
It was shown that the cumulative plastic strain depended not only on the applied cyclic stress and number of cycles, but also on the initial static deviatoric stress level.
采用恒定电流应力对薄栅氧化层MOS电容进行了TDDB评价实验，提出了精确测量和表征陷阱密度及累积失效率的方法。
TDDB evaluation experiments are implemented on the thin gate oxides MOS capacitor, and a method of precise measurement and characterization the trap density and accumulative failure are presented.
当破坏标准选定时，界限累积耗损能量与平均应力、偏应力比及动应力间较好的回归关系。
When the failure criterion is decided, the limit accumulate energy dissipation can be fitted by a formula which includes the average stress, deviator stress ratio and cyclic axial stress.
土体在动力荷载作用下，当动荷载与土体静强度的比值即循环应力比超过某一临界循环应力比时，土体才会发生累积变形和强度弱化。
The cycle stress ratio is the ratio of dynamic strength and soil static strength, as it passes the critical cycle stress ratio, accumulated deformation takes on and soil strength declines.
潮汐应力引起地壳岩石的循环应变、累积疲劳损伤，形成疲劳断裂。
The tidal stress gives rise to cyclic strain, and then forms cumulative damages and fatigue fractures in crustal rocks.
液化面作为累积剪切功的函数，从初始应力点的包络线开始，随着循环活动性的进行，逐渐接近破坏线。
The liquefaction front, originating from the envelope of initial effective stress points, gradually approaches the failure line as the cyclic mobility proceeds as a function of plastic shear work.
地震作用导致岩体变形破坏的主要机制是剪应力积聚和超静孔隙水压力累积效应的耦合作用。
Essentially the main mechanism of deformation and failure of rock mass induced by earthquake is the coupling effect of shear stress and excess static pore water pressure accumulation.
地震作用导致岩体变形破坏的主要机制是剪应力积聚和超静孔隙水压力累积效应的耦合作用。
Essentially the main mechanism of deformation and failure of rock mass induced by earthquake is the coupling effect of shear stress and excess static pore water pressure accumulation.
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