J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 171-176
Intermediate strain rate constitutive equation of 304L stainless steel from modified notched specimen torsion testO. Lurdos1, A. Aoufi1, G. Damamme2 and F. Montheillet1
1 PECM, UMR CNRS 5146, Centre SMS, École Nationale Supérieure des Mines de Saint-Étienne, 158 cours Fauriel, 42023 Saint-Étienne Cedex 2, France
2 Direction Scientifique, CEA/DAM Île de France, BP. 12, 91680 Bruyères-le-Châtel, France
Published online: 26 July 2006
A new experimental torsion test is developed to achieve intermediate strain rates. The gauge length of the classical torsion bar (27 mm) is reduced within the range 0 to 5 mm. Analytical predictions with simple constitutive equation show that strain rates achieve the magnitude of 250 s - 1. A finite difference analysis is proposed to simulate the test with more evolved constitutive equations. A comparison between experimental and numerical results shows a good agreement.
© EDP Sciences 2006