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Development of Simplified Spot Weld Models: Stiffness Prediction and Computational Performance Evaluation

[+] Author Affiliations
Noman Khandoker, Monir Takla

RMIT University, Melbourne, Australia

Thomas Ting

Victorian Partnership for Advanced Computing (VPAC) Ltd., Melbourne, Australia

Paper No. IMECE2010-38320, pp. 313-319; 7 pages
doi:10.1115/IMECE2010-38320
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 8: Dynamic Systems and Control, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4445-8
  • Copyright © 2010 by ASME

abstract

Simple spot weld connection models are desirable in huge and complicated finite element models of automotive body-in-white structures which generally contains thousands of spot weld joints. Hence, in this paper six different individual spot weld joint finite element models simplified in terms of their geometric and constitutive representations were developed including the one that is currently used in automotive industries. The stiffness characteristics of these developed models were compared with the experimental results obtained following a simple strategy to design the welded joint based on the desired mode of nugget pull out failure. It was found that the current spot weld modeling practice in automotive industry under predict the maximum joint strength nearly by 50% for different loading conditions. The computational costs incurred by the developed models in different loading conditions were also compared. Hence, a suitable model for spot welded joints is established which is very simple to develop but relatively cheap in terms of computational costs.

Copyright © 2010 by ASME

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