Post-Doctoral Assistant, Faculté des sciences appliquées, Université de Sherbrooke, Sherbrooke, Québec
Professor, Laboratoire de Physique et Mécanique des Matériaux, U.A.C.N.R.S. 1215, Faculté des Sciences, Ile du Saulcy, Metz Cedex,
(Received 9 June 1987; accepted 5 February 1988)
The biaxial strain-hardening behaviors of aluminum, α-brass, and austenitic stainless steel are characterized in plane and equibiaxial deformation paths using a novel low-cost biaxial device. These tests are complemented by conventional uniaxial tensile tests and by complex strain path studies consisting of uniaxial tension after biaxial pre-strain. The experimental results are analyzed and compared using two criteria of plasticity: von Mises and Hill. It is shown that different stress-strain curves obtained under different strain paths could not be correlated with the phenomenological yield criteria.
Paper ID: JTE11621J