希尔新屈服准则另一简化形式的外凸范围及m值对屈服轨迹的影响

THE CONVEX REGIONS OF A NEW ABBREVIATED FORM OF HILL'S NEW YIELD CRITERION AND THE INFLUENCES OF m ON YIELD SURFACES

本文根据泰勒公式推导出了屈服而外凸的一般条件。在而内同性的情况下,研究了文献[1]中所推荐的新屈服准则的外凸性,讨论了屈服轨迹随 m 值的变化规仲以及屈服轨迹的变化对板枓压延性分析的影响。

In this paper,a general convex condition of yield surface is proposed by the use of B.Taylor'sformula.The author also reviewed the papor[1]which pried the convex regions of a new yield cri-terion for planar isotropy,Furthermore,a discussion is given about the influences of m values on yieldsurfaces and on the analyses of sheet metal drawability.