rolfe-modellingfactors-2007.pdf (4.91 MB)
Modelling factors of square tubes in high speed bending situations
conference contribution
posted on 2007-01-01, 00:00 authored by Paul Collins, Jonathan Mullins, Bernard RolfeBernard Rolfe, Peter HodgsonPeter HodgsonAccurate 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
Event
SAE World Congress & Exhibition (2007 : Detroit, Michigan)Pagination
1 - 6Publisher
SAE InternationalLocation
Detroit, Michigan, USAPlace of publication
Warrendale, Pa.Start date
2007-04-16End date
2007-04-19Language
engNotes
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 SAEPublication classification
E1 Full written paper - refereedCopyright notice
2007, SAE InternationalTitle of proceedings
SAE 2007 World CongressUsage metrics
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