This paper reviews the most recent models for description of the anisotropic plastic behavior
and formability of sheet metals. After a brief review of classic isotropic yield functions, recent …

In incremental sheet forming (ISF), including single point incremental forming (SPIF) and
double side incremental forming (DSIF), the material formability can be significantly …

Incremental sheet forming (ISF) is a highly versatile and flexible process for rapid
manufacturing of complex sheet metal parts. The characteristic of localized deformation is …

Abstract The standard ISO 12004-2: 2008 provides a position-dependent methodology to
estimate the limit strains in Nakazima-and Marciniak-type tests. However, this method is not …

Forming limit diagrams (FLDs) are currently the most useful and used tool for evaluating the
workability of metal sheets. FLDs provide the failure locus at the onset of necking (commonly …

Incremental sheet forming (ISF), including single point incremental forming (SPIF) and
double side incremental forming (DSIF), has demonstrated significantly enhanced material …

The maximum force criteria and their derivatives, the Swift and Hill criteria, have been
extensively used in the past to study sheet formability. Many extensions or modifications of …

The stress/strain gradient has a clear stabilizing effect in the initiation of necking and
subsequent failure of metal sheets. In situations where bending due to mild or small forming …

Conventional sheet metal forming processes usually involve the simultaneous action of
stretching and bending, inducing strain/stress gradients across the sheet thickness and …

The necking criteria based on the maximum force principle, such as the Swift and Hill
necking models, have been extensively used in the past to study sheet formability. Many …