按照位错攀移模型，提出一种第二阶段蠕变机理。
A mechanism for secondary stage creep has been proposed according to the climbing model.
对于蠕变裂纹扩展的分析研究还是处于初期阶段，还有许多事情有待于认识和完成。
The analytical investigation of nonlinear creep crack growth is in its infancy and much remains to be learned and done .
本文依据试验结果建立的考虑黄土损伤效应的流变模型能够很好的描述黄土加速蠕变阶段的变形特点。
According to the test results, a rheological model that can reflect damage effect of loess is built in the paper, the model can analog accelerate deformation character well.
随着温度的升高和应力的增加，DZ 4合金蠕变第二阶段的时间迅速减少。
The second moment creep time of DZ4 superalloy rapidly decreases with the increasing of temperature and stress.
K46合金的高温拉伸蠕变曲线表现出非常长的稳态蠕变阶段，而较高的蠕变塑性来自于加速蠕变阶段。
It is found that the creep curves of alloy K46 consist mainly of a longer steady-state creep stage and an accelerated creep stage, which occupies the most creep strain.
在晶界上形成形态复杂稳定的碳化物能阻止空洞的连接，从而延长了蠕变第三阶段，增加了断裂时间。
The stable eutectic carbides with complex morphologyprevent coalescence of grain boundary voids and therefore prolong tertiary creep stage and rupture time.
合金拉伸蠕变曲线具有典型的三阶段特征，即较短的减速蠕变阶段和较长的第三蠕变阶段。
The tensile creep curve was composed of the typical primary creep stage, steady-state creep stage and the accelerated creep stage.
因蠕变加载作用时间缩短和疲劳载荷变化更频繁，导致在较小的应变下结束普弹应变阶段并进入延迟弹性变形的平台应变阶段。
The shortness of creep loading time and the faster frequency of fatigue load change induce general elastic strain stage to end and delayed elastic strain platform stage to begin under shorter strain.
在实验过程当中没有观察到蠕变的加速阶段，这和大多数陶瓷基复合材料的高温蠕变现象是一致的。
Throughout the experiments, there is no accelerated creep regime, which is in accordance with most of the ceramic matrix composite.
试验结果表明，横向稳定蠕变阶段的应力阈值低于轴向稳定蠕变阶段的应力阈值；
The experimental result shows that the lateral stress threshold of the second creep stage is less than that of axial stress threshold.
加速蠕变阶段是含瓦斯煤样破坏的开始。
Accelerating creep stage marks the starting of the failure of coal specimens.
由于模型是对蠕变曲线所有阶段进行拟合，因此有望实现滑坡的全程预测预报。
The model is fitted to all stages of creep curve; so it is promising to realize the whole stage forecast of landslide.
造成软岩蠕变加速阶段出现的原因是损伤起始于或明显显现于蠕变第二阶段之末。
The new equation correctly reflects such a fact as that the creep damage starts or appears at the end of the second stage and results in the accelerating creep and failure.
贾沙滑坡处于蠕变阶段，变形范围大，属大型。
Jiasha landslide is a large scale tractive landslide and on the stage of creeping deformation.
蠕变过程中粘塑性变形占主导，因而其三轴蠕变曲线没有出现渐进流动阶段。
Because of the dominance of viscoplastic deformation in the creep process, creep curves under triaxial compression behave without the third phase of atypical creep curve, viz.
针对金属材料在较高应力下没有蠕变稳定阶段的现象，提出了金属材料高低应力值的判定准则并根据高低应力的不同特点推导了不同的耦合损伤本构模型。
It has been find that there is no the second stage of creep when material under the condition of higher stress. Then judgment criterion has been proposed to deal with that phenomenon.
该流变模型通过引入非线性黏塑性体可以描述岩石流变的减速、等速特别是加速蠕变阶段。
Through introducing the nonlinear viscoplastic component, this rheological model can describe the transient creep stage, steady-state creep stage and tertiary creep stage.
对蠕变模型计算结果和试验结果的比较表明，该模型能够很好的描述蠕变曲线中的初始衰减蠕变阶段、稳态蠕变阶段和加速蠕变阶段，证明了该模型的正确性和合理性。
This model can well describe the variation of creep in the period of attenuation, steady period and period of acceleration. The validity of the model is verified by experimental data.
试验表明，页岩在较低应力水平下，轴向及侧向蠕变曲线呈现出衰减阶段的流变特性。
Experimental research reveals that the axial and lateral creep curves of shale specimens behave the attenuation creep stage under relatively low stress state.
试验表明，页岩在较低应力水平下，轴向及侧向蠕变曲线呈现出衰减阶段的流变特性。
Experimental research reveals that the axial and lateral creep curves of shale specimens behave the attenuation creep stage under relatively low stress state.
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