The effects of void nucleation occurring during the deformation history on forming limit
curves are considered for both in-plane and punch stretching employing a constitutive …

The role of void growth in triggering local necking in biaxially stretched sheets is
investigated. A recently proposed constitutive equation for porous plastic materials is …

For elastic-plastic sheets under biaxial stretching localized necking is investigated assuming
that the material follows a kinematic hardening rule. The investigation is mainly based on the …

A shear instability criterion can provide a consistent approach to the onset of local necking in
sheet metal forming under biaxial stretching. The neck is anticipated to initiate in the …

The theory of strain localization is reviewed with reference both to local necking in sheet
metal forming processes and to more general three dimensional shear band localizations …

The Marciniak–Kuczynski (MK) forming limit model is extended in order to predict localized
necking in sheet metal forming operations in which Through-Thickness Shear (TTS), also …

Various factors affecting the prediction of limit strains in biaxiallystretched sheets are
studied, Time-independent material behavior is assumed, and both the flow theory of …

B y using a simplified constitutive model of a pointed vertex on subsequent yield loci,
namely, such that the equations of deformation-theory of rigid-plastic solids apply for fully …

Criteria for diffuse and local necking in sheet metals stretched over a hemispherical punch
have been developed. During stretching, a peak develops in the distribution of strain across …

The purpose of this study is to determine analytically the orientations of localized necks
occurring in sheet metal forming processes, and obtain the corresponding forming limit …