J. Phys. IV France 04 (1994) C8-477-C8-482
An evaluation of constitutive relations for high-rate material behaviour using the tensile Hopkinson-barJ.P. Noble and J. Harding
Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, U.K.
Tensile tests have been performed on specimens of Remco iron at strain rates from quasi-static to -2500/s and high-speed photography has been used to monitor the deformation of the specimen in tests at the highest rates. The DYNA 2D finite element code and the Johnson-Cook and Zerilli-Armstrong constitutive relations have been used to model the specimen behaviour in the impact test and the numerical predictions are compared with experimental measurements.
© EDP Sciences 1994