The flow stress decreases and the elongation increases with the decrease of stress rate .
随着拉伸速度的减小，合金的流变应力减小，延伸率增大。
The results show that flexural strength of fresh water ice is closely related to stress rate and temperature.
结果表明，水库淡水冰弯曲强度与应力速率和冰温有着密切关系。
After reaching maximal flexural strength, with the increase in stress rate, the flexural strength decreases instead.
达到极限弯曲强度后，应力速率继续增加，弯曲强度值呈减小趋势。
Considering the judgment of dynamic instability of truss structures, a stress rate method for dynamic instability analysis of truss structures was proposed.
针对结构动力失稳的判定问题，提出了一种适用于杆系结构动力稳定分析的应力变化率法。
The change of strain rate and stress rate of samples with and without yielding phenomenon was studied during the tensile test under the control of grip separate rate.
采用夹头分离速率控制方式对有屈服现象和无屈服现象的试样进行拉伸试验，探讨了试验过程中试样应变速率和应力速率的变化情况。
How to control the stress rate and strain rate of material testing machines scientifically and effectively is a key problem in the testing machine field.
如何科学有效地达到对材料试验机的应力速率及应变速率控制，是目前试验机领域的关键问题。
In general, a higher pre existing microcrack density or a lower loading stress rate results in a longer nucleation stage, and therefore, increases the predictability of catastrophic failure event.
一般而言，在相同加载条件下预存微破裂密度越高，或对同一岩石加载速度越慢，对应的断层成核过程就越长，因此最终破坏的可预报性也越高。
In general, a higher pre existing microcrack density or a lower loading stress rate results in a longer nucleation stage, and therefore, increases the predictability of catastrophic failure event.
一般而言，在相同加载条件下预存微破裂密度越高，或对同一岩石加载速度越慢，对应的断层成核过程就越长，因此最终破坏的可预报性也越高。
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