Forming limit of TWBs with material damage consideration - Finite element simulation and experiments

M. Jie, C. L. Chow, Luen Chow Chan, C. H. Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


Forming limit of tailor-welded blanks (TWBs) is studied experimentally and numerically. TWBs made of JIS G3141 steel were manufactured with laser-welding. Three sets of different thickness ratios were chosen for the investigation. The mechanical properties and damage parameters of the material required for the simulation were measured. A damage coupled plastic model and the damage criterion for localized necking were coded in LS-DYNA through a user-defined material subroutine with detailed procedures. By means of input cards of LS-DYNA, the user-defined history variables can be properly stored and displayed. To illustrate the application of the damage coupled LS-DYNA, the simulation of the TWB forming process was performed. The predicted forming limit strains were found to compare satisfactorily with those obtained from the tests.
Original languageEnglish
Pages (from-to)385-390
Number of pages6
JournalKey Engineering Materials
Issue numberI
Publication statusPublished - 1 Dec 2004


  • Finite element analysis
  • Forming limit diagram
  • Material damage
  • Tailor-welded blanking

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)


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