A methodological improvement of dynamic fracture toughness evaluations using an instrumented Charpy impact tester T. Lorriot, E. Martin, J.M. Quenisset, S. Sahraoui and J.L. Lataillade J. Phys. IV France, 04 C8 (1994) C8-125-C8-130 DOI: 10.1051/jp4:1994819