WRINKLING PREDICTION FOR MIXED-HARDENING METALS IN DEEP-DRAWING PROCESS

K., WIRATKASEM; S., HARNCHOOWONG

doi:10.21608/amme.2008.39794

WRINKLING PREDICTION FOR MIXED-HARDENING METALS IN DEEP-DRAWING PROCESS

Document Type : Original Article

Authors

WIRATKASEM K. ¹
HARNCHOOWONG S. ²

¹ Graduate student, Dpt. of Mechanical Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand.

² Professor, Dpt. of Mechanical Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand.

10.21608/amme.2008.39794

Abstract

ABSTRACT
Wrinkling in deep-drawing process was analyzed as the form of short-wavelength
shallow buckling modes based on the Donnell-Mushtari-Vlasov shell theory. The local
analysis considered the current deformed state of a sheet element in a doubly-curved,
biaxial plane stress state. The yield criterion for mixed-hardening metal used J2 yield
criterion for isotropic metal and Hosford’s yield criterion for anisotropic metal. The effect
of back stresses on wrinkling limit curves was investigated numerically.

Keywords