在相同动应力幅值条件下，频率越高，强度越高；
The shear strength increases with increasing frequency in the same dynamic amplitude.
文中还给出了对应于不同可靠度下的最大容许应力幅值。
Themaxium range of allowable stress under different reliability is given.
着重研究了不同循环历史对后面循环稳定应力幅值的影响。
The authors have especially investigated the effect of different cyclic history on the amplitudes of stabilized stresses.
结果表明预应力辊内、外表面处的应力幅值有了较大的降低。
The results illustrate that the values of stress at both inside and outside surfaces of prestressed pull-straightening roller are much lower.
对试验结果进行分析可得：动应力幅值对试样的轴向动应变影响显著；
The results show that the dynamic stress level has strong effect on dynamic axial strain.
重点分析了应力幅值、波形、频率等因素对岩石疲劳破坏寿命的影响规律。
It was emphasized that the fatigue life of rock sample was influenced by stress amplitudes, waveforms and frequencies.
结果显示动态应变呈循环蠕变状态，蠕变的大小、速度与循环应力幅值有关。
The experimental results showed that the dynamic strain has feature of cyclic creep. Cyclic loading affected the creep and creep speed.
疲劳寿命(Nf)：在某一指定应力幅值下，引起疲劳失效的应力循环总数。
Fatigue life (Nf). The total number of stress cycles that will cause a fatigue failure at some specified stress amplitude.
结果表明，应力幅值的增加会导致合金高温疲劳寿命的下降及使变形机制改变。
The results show that the increase of stress range value would result in decreasing the high temperature fatigue lifetime of the alloy and the difference of the deformation mechanism.
通过岩石试件的能量有一个最大的极限，该极限实质上是一个应力幅值的极限。
A maximum limit of the energy which can be transmitted through a rock specimen was found.
当轴向应力与剪应力幅值的比值保持不变时，砂土液化强度随着椭圆面积的增大而降低。
For the same ratio of two stress components, the resistance to liquefaction of saturated sand decreased with the increasing area of the elliptical stress path.
最后通过模态扩展计算得到圆角危险截面圆弧上各点在疲劳试验过程中的弯曲正应力幅值。
The bending normal stress amplitudes of the nodes in the critical section near crankshaft fillet were obtained by modal expanded computation.
通过淬火可以获得高强度、高韧性的铝合金，同时淬火后分布于毛坯中的残余应力幅值很大。
Although the strength and toughness of aluminum alloy 7075 can be increased greatly by quenching, this process will result in large magnitude of residual stress.
经过预力学循环的材料在应力幅值较小时模量随其升高，而较高时降低，主要和内部位错密度上升有关。
When the stress amplitude is small, modulus of materials after pre-mechanical cycling increased with the stress amplitude, and down when it is higher.
提供的公式可用来估定合乎实用的疲劳应力幅值，表明现行规程中提供的疲劳容许应力指标需要加以修正。
The proposed formula used to evaluate the allowed fatigue stress range shows that a new amendment for the criterion of allowable fatigue stress provided in the current code is necessary.
在近场地震动作用下双层隧道下层的地震应力幅值要比上层的地震应力幅值大，在远场地震动作用下则相反；
The seismic stress amplitude of the lower layer is larger than that of the upper layer under near-field ground motion, and under far-field ground motion the condition is opposite.
预应力幅值调整为三种情况，地震波的输入方向为竖直和水平竖直双方向，共完成了两组地震波12个工况的振动台试验。
There are three prestressing values and two earthquake wave directions, total 12 test cases are finished in this paper.
温度变化对复合材料板应力场的影响与温度变化幅值、加载方式和初始温度的大小有很大的关系。
The influence of temperature to the composite stress is very complex, it relates to initial temperature, temperature range and the way to give loads.
分析表明，高幅值的残余压应力和“有效晶粒”细化是提高弯曲疲劳性能的主要因素。
The results of the analyses show that high residual compressive stress and fine scattered martensite units are the main cause of improving fatigue properties.
通过应力控制，研究了幅值比，平均应力，应力幅，加载率对棘轮应变以及棘轮应变幅的影响。
Through the stress-controlled test the effect of the amplitude ratio, the average stress, stress amplitude and loading rate on the ratcheting strain and strain range are studied.
结果表明，装夹位置对残余应力分布具有重要影响，而装夹顺序对残余应力的分布和幅值无较大影响。
It is verified that clamping points have great effect on the residual stress, but that of the clamping order is little.
该模型给出了一个新的背应力演化方程，引入了非比例度参量，并且还考虑了最大塑性应变幅值记忆效应和温度效应的影响。
In this model, a new kinematic hardening equation was used; the non-proportionality, the effect of temperature and memorization for the maximum plastic strain amplitude were also considered.
结果表明，该地下厂房主要部位的动应力、位移、速度和加速度幅值满足振动允许标准。
Results show that amplitudes of dynamic stress, displacement and acceleration meet the suggested vibration standard.
影响岩石疲劳寿命的主要因素是周期荷载的上限应力和幅值。
The amplitude and maximum of cyclic load are the most important effect factors on fatigue lifespan of rock.
影响岩石疲劳寿命的主要因素是周期荷载的上限应力和幅值。
The amplitude and maximum of cyclic load are the most important effect factors on fatigue lifespan of rock.
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