• CN：11-2187/TH
• ISSN：0577-6686

›› 2007, Vol. 43 ›› Issue (12): 74-77.

• 论文 •

### 轴对称塑性变形区内一点流动方向的探索

1. 哈尔滨工业大学材料科学与工程学院
• 发布日期:2007-12-15

### INVESTIGATION ON FLOW DIRECTION OF A POINT IN AXISYMMETRIC PLASTIC DEFORMATION

ZHANG Ji;HE Zhubin;YUAN Shijian

1. School of Materials Science and Engineering, Harbin Institute of Technology
• Published:2007-12-15

Abstract: In order to investigate the relationship between the flow direction of a point and local stress field in plastic deformation, an approximate solve algorithm is carried out to calculate the maximum mean stress gradient direction of local stress field. The algorithm is applied to calculate the maximum mean stress gradient directions in stress fields of typical axisymmetric problems, such as cylinder compression, ring compression and extrusion. Then the maximum mean stress gradient directions and the flow directions of points are visualized and compared. Good similarity is found between the movement direction and the maximum mean stress gradient direction of the related local mean stress field in the deforming bodies. Furthermore, the motion of a point in plastic deformation is decomposed into two components：the motion of rigid body and the relative motion. The motion of rigid body is mainly determined by tool motion, while the relative motion is consistent with the maximum mean stress gradient direction.