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International Journal of Material Forming
Erschienen in: International Journal of Material Forming 3/2016

06.03.2015 | Thematic Issue: Formability of metallic materials

Path-independent forming limit models for multi-stage forming processes

verfasst von: Robert E. Dick, Jeong Whan Yoon, Thomas B. Stoughton

Erschienen in: International Journal of Material Forming | Ausgabe 3/2016

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Abstract

Many practitioners of the metal forming community remain faithful to the idea that strain metrics are useful for formability assessment. However, it is only valid when deformation occurs along linear strain paths. Current simulations of multi-stage sheet forming processes for rigid-packaging and automotive components result in higher rejection rates due to the inaccuracy of forming and fracture limit models. In this work, we establish a new approach considering path-independency in forming limits based on the stress-based forming limit and polar EPS (Effective Plastic Strain) diagram which appear to be an effective solution for nonlinear effects. The related theory has been implemented into a user material model in commercial software.
Vorheriger Artikel Effect of slide motion on springback in 2-D draw bending for AHSS
Nächster Artikel Towards accuracy improvement in single point incremental forming of shallow parts formed under laser assisted conditions

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Metadaten
Titel
Path-independent forming limit models for multi-stage forming processes
verfasst von
Robert E. Dick
Jeong Whan Yoon
Thomas B. Stoughton
Publikationsdatum
06.03.2015
Verlag
Springer Paris
Erschienen in
International Journal of Material Forming / Ausgabe 3/2016
Print ISSN: 1960-6206
Elektronische ISSN: 1960-6214
DOI
https://doi.org/10.1007/s12289-015-1220-4

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