J. Phys. IV France 110 (2003) 391
Model of dynamic compression tests on hydraulic testing machines: Influence of dynamic phenomenaS. Diot, A. Gavrus, D. Guines and E. Ragneau
INSA de Rennes, Laboratoire MA$^2$G, 20 avenue des Buttes de Coësmes, CS. 14315, 35043 Rennes cedex, France
The forming process simulation requires models describing the materials behaviour at large strains and at strain rates up to hundreds of s -1. The major difficulty then encountered is that few experimental tests enable to reach these two criteria. For a few years, several studies have been carried out on hydraulic machines provided with a dynamic jack. However, for higher strain rates tests, the load measurement is disturbed by the response of the experimental set-up and oscillations appear. In this article, the experimental test is developed and a finite element model of the set-up is introduced.
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