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Forming parts over small radii

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conference contribution
posted on 2016-09-01, 00:00 authored by S K Hazra, D J Hughes, Michael PereiraMichael Pereira, Bernard RolfeBernard Rolfe
Stamping simulations usually make the plane stress simplifying assumption. However, this becomes less valid when material draws around features with radius to sheet thickness ratios less than 20. Pereira, Yan & Rolfe (Wear, Vol.265, p.1687 (2008)) predicted that out-of-plane stress equivalent to material yield can occur because a line contact forms briefly at the start of the draw process. The high transient stress can cause high rates of tool wear and may cause the 'die impact line' cosmetic defect. In this work, we present residual strain results of a channel section that was drawn over a small radius. Using the neutron source at the Institut Laue-Langevin, in-plane and out-of-plane strains were measured in the channel part to show some support for the conclusions of Pereira et. al.

History

Event

Numerical Simulation of 3D Sheet Metal Forming Processes. International Conferrence and Workshop. (10th : 2016 : Bristol, England)

Volume

734

Issue

3

Pagination

1 - 4

Publisher

IOP Publishing

Location

Bristol, England

Place of publication

Bristol, Eng.

Start date

2016-09-04

End date

2016-09-09

ISSN

1742-6588

eISSN

1742-6596

Language

eng

Publication classification

E Conference publication; E1 Full written paper - refereed

Copyright notice

2016, The Authors

Title of proceedings

NUMISHEET 2016: Proceedings of the 10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

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