0
research-article

Forming Limits Under Stretch-Bending Through Distortionless and Distortional Anisotropic Hardening

[+] Author and Article Information
Ji He

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao, Tong University, Shanghai 200240, China
benbenhj@sjtu.edu.cn

Bin Gu

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao, Tong University, Shanghai 200240, China
gubin1990@sjtu.edu.cn

Yongfeng Li

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao, Tong University, Shanghai 200240, China
yfli11@163.com

Shuhui Li

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao, Tong University, Shanghai 200240, China
lishuhui@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4041329 History: Received May 04, 2018; Revised August 18, 2018

Abstract

The necking behavior of sheet metals under stretch-bending process is a challenge for the forming limit prediction. State of the art forming limit curves allows the prediction under the in-plane stretching but fall short in the case under out-of-plane loading condition. To account the bending and straightening deformation when sheet metal enters a die cavity or slide along a radius, anisotropic hardening model is essential to reflect the non-proportional loading effect on stress evolution. This paper aims to revisit the M-K analysis under the stretch-bending condition and extend it to accommodate both distortionless and distortional anisotropic hardening behavior. Furthermore, hardening models are calibrated based on the same material response. Then the detailed comparison is proposed for providing better insight into the numerical prediction and necking behavior. Finally, the evolution of the yield surface and stress transition states are examined. It is found that the forming limit prediction under stretch-bending condition through the M-K analysis strongly depends on the employed anisotropic hardening model.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In