J. Phys. IV France 01 (1991) C3-27-C3-34
COMPORTEMENT DYNAMIQUE D'UNE NUANCE DE BERYLLIUMD. MONTOYA, G. NAULIN et J.P. ANSART
Commissariat à l'Énergie Atomique, Centre d'Études de Bruyères le Châtel, BP. 12, F-91680 Bruyères-le-Châtel, France
We have developed an elastic viscoplastic model for beryllium, which can be easily incorporated into a computer code. The form of the equation is next to Steinberg, Cochran and Guinan's model. The influence of temperature and strain rate is taken into account in the expressions of the elastic limit and the stress hardening function. The equation is settled from quasi static and dynamic compression tests. It can be then extrapolated over a wide range of stress, strain, strain rate and temperature. This allows to successfully calculate impacted sample profiles, as well as shock wave profiles.
© EDP Sciences 1991