8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 171-176
DOI: 10.1051/jp4:2006134026

Intermediate strain rate constitutive equation of 304L stainless steel from modified notched specimen torsion test

O. Lurdos¹, A. Aoufi¹, G. Damamme² and F. Montheillet<sup>1

1</sup>  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)

Abstract
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

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