- Conference date: 27–29 April 2011
- Location: Belfast, (United Kingdom)
Friction stir welded blanks (FSWB) are tailored blanks made by friction stir welding of sheets of different thicknesses and quality. In order to reduce the trial‐and‐error principles and costs, the computational simulation of stamping processes of FSW blanks is required for which a feasible methodology or theory to evaluate the forming characteristics has to be incorporated. In the present work, the validity of effective strain rate based necking criterion (ESRC) in both original and modified forms to predict the forming limit of FSW blanks made of AA6111, DP590 is analyzed. The FLC thus predicted is compared with FLC from thickness gradient based necking criterion and from literature. It is found from the validation done with literature results that a consistent and accurate forming limit prediction is obtained from modified ESRC when compared to original ESRC. The failure pattern prediction is also agreeing well with the literature results.
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