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Modelling factors of square tubes in high speed bending situations

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conference contribution
posted on 2007-01-01, 00:00 authored by Paul Collins, Jonathan Mullins, Bernard RolfeBernard Rolfe, Peter HodgsonPeter Hodgson
Accurate finite element crash simulations of side impact depend upon a thorough understanding of dynamic tube bending. There is a need to understand the dynamic bending mode of square sections (equivalent of automotive structural parts) to obtain a greater confidence in CAE. This work varied strain rate and material definitions, such as Cowper-Symonds vs Zerilli-Armstrong, as well as initial velocity and yield strength. The results show that most of the plastic work is done between strains rates of 30 ¿ 300/s and strains up to 0.3. Peak strain rates were marginally above 1000/s with maximum strain greater than 1. When the strain rate definition and material model were modified, it was shown that a higher yield stress produced a higher reaction force. These results would suggest that the strain rate sensitivity needs to be carefully identified for accurate crash simulations.

History

Pagination

1 - 6

Location

Detroit, Michigan, USA

Open access

  • Yes

Start date

2007-04-16

End date

2007-04-19

Language

eng

Notes

SAE Paper 2007-01-0887 ©2007 SAE International. This paper is posted on this website with permission from SAE International. This paper may not be copied, distributed or forwarded to others for further use without permission from SAE

Publication classification

E1 Full written paper - refereed

Copyright notice

2007, SAE International

Title of proceedings

SAE 2007 World Congress

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