✦ LIBER ✦

A finite element model for thermomechanical analysis of sheet metal forming

✍ Scribed by G. Bergman; M. Oldenburg

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 304 KB
Volume: 59
Category: Article
ISSN: 0029-5981
DOI: 10.1002/nme.911

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✦ Synopsis

Abstract

A thermal model based on explicit time integration is developed and implemented into the explicit finite element code DYNA3D to model simultaneous forming and quenching of thin‐walled structures. A staggered approach is used for coupling the thermal and mechanical analysis, wherein each analysis is performed with different time step sizes. The implementation includes a thermal shell element with linear temperature approximation in the plane and quadratic in the thickness direction, and contact heat transfer. The material behaviour is described by a temperature‐dependent elastic–plastic model with a non‐linear isotropic hardening law. Transformation plasticity is included in the model. Examples are presented to validate and evaluate the proposed model. The model is evaluated by comparison with a one‐sided forming and quenching experiment. Copyright © 2004 John Wiley & Sons, Ltd.

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