... shear-stress gradient 剪应力梯度 stress gradient hypothesis 胁迫梯度假说 gradient stress 梯度应力 ...
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这样回避了速度梯度间断的困难，缓和了出口处应力奇性引起的矛盾，同时又减少了计算量。
Thus the difficulties of discontinuous velocity gradient and the stress singularity at the exit point are avoided, and the expense of computation is reduced.
其次主要介绍了不含高阶应力的一类应变梯度理论及其应用；
Then, we introduce a strain gradient theory and its main applications, in which no high-order stresses are included.
文章以人体颈动脉余弦扩张为例进行分析，详细讨论了局部扩张对血管壁切应力及其梯度分布的影响。
As an example, the human carotid with local cosine form expansion was analyzed and the effects of local expansion on the distribution of wall shear stress and its gradient were discussed in detail.
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