各向异性双晶和三晶体弹塑性应力场分析

用三维弹塑性晶体滑移有限元程序对不同晶体取向的双昌和三晶体在昌界和三晶交点处的应力集中科技司和滑激活规律进行了计算分析。双晶体在计算时考虑取向的影响，计算结果表明，晶界处应力有较大的出现复杂的变化规律，这种规律与晶体取向相关；三晶交点和晶界使得三晶体应力重新分布，三晶交点可能是应力集中之地，但也可能不造成应力集中，这主要与三个晶体取向相关。本文计算表明，只有仔细地研究细观过程，才能准确理解金属材料

Elastic-plastic stress distribution in anisotropic bicrystals and tricrystals

The crystallographic finite element method has been used in the analysis of the elastic|plastic distributions in anisotropic bicrystals and tricrytals, taking the different crystallographic orientations into consideration. The results of bicrystal model, considering the different crystallographic orientations, shows that there are stress concentrations near the boundaries. The features of stress concentrations are dependent on the crystallographic orientations of the two grains. The existing of triple junctions in the tricrystals may result in the stress concentrations, may not, depending on the crystallographic orientations of the three grains. The work of the paper shows that it is only by the detail study of the stress distribution that the metal fracture can be understood deeply.