Wrinkle formation tendencies in the form of short-wavelength shallow buckli
ng modes are investigated for sheet materials exhibiting planar anisotropy.
The critical state for the onset of these short-wave length shallow modes
are determined from plastic bifurcation theory. A local analysis is perform
ed by considering the current deformed state of a sheet element in a doubly
-curved, biaxial plane stress state. The planar anisotropy is prescribed us
ing recently proposed anisotropic yield criteria. Parametric studies are pe
rformed to assess the effects of the various material and geometric paramet
ers on wrinkling. (C) 2001 Elsevier Science Ltd. All rights reserved.