采用上限方法，给出了多孔粘塑性材料正交流动法则存在的条件。

And, taking terms of an upper bounded approach, the existence condition for a normal flow regulation is obtained for the voided viscoplastic material.

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采用塑性变形理论和刚粘塑性材料模型研究了直流电阻对焊接头的塑性变形。

The joint deformation of DC upset butt welding was studied by using theory of plastic deformation and rigid-viscosity plastic material model.

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从而本文揭示了幂硬化粘塑性材料反平面剪切动态扩展裂纹尖端场的渐近行为。

Therefore the asymptotic behaviour near a anti-plane share dynamic propagating crack-tip field in power-law-viscoplastic material is revealed.

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