Numerical Study of Twist Spring-back Control with an Unbalanced Post-stretching Approach for Advanced High Strength Steel

2018-01-0806

04/03/2018

Features
Event
WCX World Congress Experience
Authors Abstract
Content
Twist spring-back would interfere with stamping or assembling procedures for advanced high strength steel. A “homeopathic” resolution for controlling the twist spring-back is proposed using unbalanced post-stretching configuration. Finite element forming simulation is applied to evaluate and compare the performance for each set of unbalanced post-stretching setup. The post-stretching is effectuated by stake bead application. The beads are separated into multiple independent segments, the height and radii of which can be adjusted individually and asymmetrically. Simulation results indicate that the twist spring-back can be effectively controlled by reducing the post-stretching proximate to the asymmetric part area. Its mechanism is qualitatively revealed by stress analyses, that an additional but acceptable cross-sectional spring-back re-balances the sprung asymmetrical geometry to counter the twist effect. It can be futile if the overall level of post-stretching exceeds the effective controlling limit.
Meta TagsDetails
DOI
https://doi.org/10.4271/2018-01-0806
Pages
8
Citation
Jia, Y., Pu, C., Zhu, F., Zhou, D. et al., "Numerical Study of Twist Spring-back Control with an Unbalanced Post-stretching Approach for Advanced High Strength Steel," SAE Technical Paper 2018-01-0806, 2018, https://doi.org/10.4271/2018-01-0806.
Additional Details
Publisher
Published
Apr 3, 2018
Product Code
2018-01-0806
Content Type
Technical Paper
Language
English