Modeling the strain localization of shell elements subjected to combined stretch–bend loads: Application on automotive sheet metal stamping simulations

This study presents a modeling approach for predicting strain localization during sheet metal stamping processes focused on automotive engineering applications. The so-called stretching-to-bending ratio, ρ, is proposed to characterize the loading conditions acting on an element during stamping proce...

Full description

Saved in:
Bibliographic Details
Published in:Thin-walled structures 2023-07, Vol.188, p.110804, Article 110804
Main Authors: Pham, Quoc Tuan, Islam, Md Shafiqul, Barlo, Alexander, Sigvant, Mats, Caro, Lluís Pérez, Trana, Kristoffer
Format: Article
Language:English
Subjects:
Automotive sheet metal
Automotive sheet metals
Bending load
Bending tests
Ductile fracture
Sheet metal
Shell element
Stamping
Strain gradients
Strain localization
Strain localizations
Stretch-bending
Stretch–bending load
Thickness strain
Through-thickness
Through-thickness strain gradient
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study presents a modeling approach for predicting strain localization during sheet metal stamping processes focused on automotive engineering applications. The so-called stretching-to-bending ratio, ρ, is proposed to characterize the loading conditions acting on an element during stamping processes. Then, localized strain or necking strain is suggested to be a function of ρ. Different stretch–bending tests with different tool radii, i.e., R3, R6, R10, and R50 are conducted for two automotive sheet metals, DP800 and AA6010, to identify their forming limits under combined stretch–bend loads. The calibrated necking limit curve of the AA6016 sheet is then employed in AutoForm R10 software to predict the necking and failure of a stamped panel. Agreement with the experimental observation of failure positions of the panel validates the usefulness of the proposed modeling approach in practice. •Proposal of the so-called stretching-to-bending ratio, ρ of shell elements•Proposal of the necking limit curve as a function of ρ•Calibrate the necking limit curve of two automotive sheet metals: DP800 and AA6016.•Validate the calibrated AA6016 curve via a test die stamping simulation in AutoForm•Good agreement with experimental observation on the deformed panel’s failure positions.
ISSN:0263-8231
1879-3223
1879-3223
DOI:10.1016/j.tws.2023.110804