Journal Article

Study on the influence of loading modes on the forming behavior of thin-walled structures with external cross-ribs

Zhu, Zhengwu, Ouyang, Yawen, Yu, Zhongqi, Zhao, Yixi

2025

Overview

During the plastic forming process, the change of loading mode directly affects the deformation condition of the material. In this study, two forming methods are applied in the forming process of the thin-walled structure with external cross-ribs. The forming characteristics differences between the point loading mode and the line loading mode were investigated in terms of material flow behavior, stress-strain distribution, and forming uniformity. The results indicate that the non-essential axial deformation was reduced and the directional deformation was accomplished by the line loading mode. Compared to the point loading mode, the forming loading was reduced by approximately 30%. The material deformation mainly focused on the surface region of the workpiece since the loading deformation area was small under the point loading mode, and the part showed a significant delamination deformation and stress concentration. However, under the line loading mode, these phenomena can be improved. The radial equivalent strain gradient of the external cross-ribs formed by the line loading mode is about 1/3 of that by the point loading mode. Additionally, the height discrepancy of transverse ribs between the spin-in and spin-out sides was reduced under the fixed diversion surface, and the forming uniformity of the external cross-ribs was improved.

• Publisher: IOP Publishing
• Subject: Deformation / Strain distribution / Stress concentration / Thin wall structures / Workpieces