An investigation of a new 2D CDM model in predicting failure in HFQing of an automotive panel

Mohamed Mohamed, Nan Li, Liliang Wang, Omer EL Fakir, Jianguo Lin, Trevor Dean, John Dear

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

3 Citations (Scopus)
11 Downloads (Pure)


In this paper a comparative analysis of failure prediction when using the solution heat treatment cold die forming and quenching process, known as HFQ™, for forming an aluminium alloy AA6082 automotive panel part (bulkhead panel), is presented. An experimental programme has been designed and a series of tests have been carried out to investigate the effect of process parameters on the success of forming the complex-shaped automotive panel component using the high strength aluminium alloy. A set of unified viscoplastic plane-stress continuum damage mechanics (2D-CDM) constitutive equations was calibrated for AA6082 over a temperature range of 450 ºC–525 ºC and strain rates of 0.1, 1.0 and 10 s-1, and then was integrated into the commercial finite element code, LS-DYNA, via a user-defined material subroutine, UMAT, for the forming process simulation. The results show that the CDM model can be used to provide accurate formability and failure predictions.
Original languageEnglish
Title of host publication4th International Conference on New Forming Technology (ICNFT 2015)
EditorsS. J. Yuan, J. Lin, Y. Qin, T. A. Dean, F. Vollertsen
PublisherEDP Sciences
Number of pages6
ISBN (Print)9782759818235
Publication statusPublished - 10 Aug 2015

Publication series

NameMATEC Web of Conferences
PublisherEDP Sciences
ISSN (Print)2261-236X


  • aluminium
  • aluminium alloys
  • constitutive equations
  • continuum damage mechanics
  • finite element method
  • high strength alloys
  • strain rate
  • stresses


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