Skip to Main content Skip to Navigation
Theses

Étude des effets des changements de trajet en emboutissage

Abstract : In sheet metal forming process, the material usually undergoes large deformations, complex loading histories and its mechanical behavior can be modeled by constitutive equations. Despite the great efforts paid to develop advanced hardening models considering the Bauschinger effect, the reliability and applicability of the developed hardening models still needs to be investigated, both experimentally and theoretically. In the first part, based on the developed hardening models, some classical and advanced models are selected are implemented by using Euler explicit implementation method. After that, the developed numerical instruments in current work are applied to investigate the prediction of the yield surface evolution, which show that some apparent violation of the normality condition can be simulated using models based on associated plasticity. The second part mainly focuses on characterizing and discriminating for selecting material models. Firstly some characterizations tests including complex loading path are performed to identify material parameters and bending-under-tension discriminant test is built to investing springback behavior that can sort out the best model.
Complete list of metadatas

Cited literature [225 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-03015165
Contributor : Abes Star :  Contact
Submitted on : Thursday, November 19, 2020 - 5:41:07 PM
Last modification on : Friday, November 20, 2020 - 3:13:30 AM

File

yang.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-03015165, version 1

Citation

Yanfeng Yang. Étude des effets des changements de trajet en emboutissage. Autre [cond-mat.other]. HESAM Université, 2020. Français. ⟨NNT : 2020HESAE001⟩. ⟨tel-03015165⟩

Share

Metrics

Record views

77

Files downloads

26