An Analytical Model for Spring-Back Prediction in U-Channel Forming with Advanced High Strength Steel
2018-01-0805
04/03/2018
- Features
- Event
- Content
- Spring-back phenomena are critical in stamping procedures for advanced high strength steel. An analytical model is developed to predict the spring-back effect for a U-channel part with post-stretching process. The stress distribution is obtained by direct application of material constitutive relationship. The subjected loading conditions are sequentially bending, (un-bending), and uniform stretching, based on different zones in the part. Both the loading history and the friction effects are considered in the model. The bending moments are obtained to generate a theoretical spring-back shape. Great performance in spring-back control is achieved by applying certain high level of external forces. FE simulation is conducted for the identical stamping process with post-stretching. Good correlation is observed between the analytical and numerical solutions/experimental results under various scenarios.
- Pages
- 14
- Citation
- Jia, Y., Pu, C., Zhu, F., and Wang, Y., "An Analytical Model for Spring-Back Prediction in U-Channel Forming with Advanced High Strength Steel," SAE Technical Paper 2018-01-0805, 2018, https://doi.org/10.4271/2018-01-0805.