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Study of Die Deformation Influence on Part Springback of an Automotive Chassis Component

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Abstract:

Die deformation has long been suspected to cause bad damages that are challenging to recover and have a straight impact on the quality of the final product. The forming industry would greatly be benefited if this mystery is faithfully uncovered. This study tries to investigate the effect of die deformation on the geometrical quality of the workpiece in terms of springback through finite element simulation. The forming process of a 1-m-long car chassis component made out of the HR420LA hot-rolled high-strength low alloy steel sheet with a thickness of 3 mm is particularly picked out to be examined. Therein, the mechanical properties of the steel sheet are neatly characterized through a group of uniaxial tensile tests. The two similar r-based Hill48 criteria are used to model the yield behavior of the steel sheet. The hybrid Ludwig-Voce strain hardening law is applied to account for the hardening during plastic deformation. The simulation results show that die deformation has a very limited effect on part springback as the evaluated dies are fairly rigid and hence deform very little by less than 0.25 mm. The effect of yield model variation is even negligible on part springback as the two chosen models are closely connected. Taking die deformation into consideration when designing new dies is unnecessary if the anticipated degree of deformation is not large enough.

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Periodical:

Materials Science Forum (Volume 1173)

Pages:

27-34

DOI:

https://doi.org/10.4028/p-hYK08y

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Online since:

December 2025

Authors:

Pornsawan Yindeepimol, Sansot Panich, Sujitra Lolupiman, Komkamol Chongbunwatana*

Keywords:

Anisotropic Hill’48 Yield Criterion, Die Deformation, Hybrid Ludwig-Voce Strain Hardening Law, Springback

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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