Application of a few necking criteria in predicting the forming limit of unwelded and tailor-welded blanks

• Published in: Journal of strain analysis for engineering design Vol. 45; no. 2; pp. 79 - 96
• Main Authors: Srinivas Naik, B, Janaki Ramulu, P, Ganesh Narayanan, R
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.02.2010; SAGE PUBLICATIONS, INC
• Subjects: Blanks; Criteria; Formability; Friction; Materials science; Mechanical engineering; Necking; Strain; Strain rate; Tailored blanks; forming limit; unwelded blanks; failure criteria; tailor-welded blanks

The limiting value of strain describing necking/failure during a sheet stamping operation is quantified, predicted by the forming limit curve (FLC). The main aim of the present work is to analyse the applicability of the few existing necking criteria, namely the effective strain rate based criterion...