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本文给出平面应力状态诸工序在屈服轨迹上的应力分区,由图1可以直接看出三个互相垂直主方向上的尺寸变化情况。文章着重对三向应力状态如何在屈服轨迹上分区进行讨论,认为将Mises圆柱展开为平面是比较方便的一种方法。首次给出用平均应力σm及代表应变特征的角θ为纵横坐标的应力平面图和各区域之间边界线的方程,还给出了角θ与Lode系数μσ之间的关系,最后给出典型塑性成形工序在图3中的部位,由图3可以判断各方向尺寸变化趋向及各工序的塑性与抗力相对大小。
In this paper, the stress subdivision of the workstations in the plane stress state on the yielding trajectory is given. From Figure 1, the dimensional changes of the three mutually perpendicular principal directions can be directly seen. The article focuses on how the three-dimensional stress state is divided on the yield trajectory. It is a convenient method to expand the Mises cylinder into a plane. For the first time, the stress plane diagram with the average stress σm and the angle θ representing the strain characteristic as the ordinate and the equation of the boundary line between the regions are given. The relationship between the angle θ and the Lode coefficient μσ is also given. Finally, the typical plasticity Forming process In Figure 3 parts, from Figure 3 can determine the direction of dimensional changes in all directions and the relative plasticity and resistance of each process size.