DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 597 - 602
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 597-602
DOI: 10.1051/dymat/2009085

High strain rate bulge testing of a DP450 steel using a nylon SHPB system

V. Grolleau1, D. Mohr2, A. Penin1, G. Gary2 and B. Galpin1

1  LIMATB Laboratory (EA 4250), Université de Bretagne Sud, France
2  LMS Laboratory (CNRS-UMR 7649), École Polytechnique, France

Published online: 15 September 2009

A dynamic bulge testing technique is developed to investigate the biaxial plasticity of sheet materials at intermediate and high strain rates. The main component of this new dynamic testing device is a bulge cell which is mounted on the input bar of a conventional split Hopkinson pressure bar system. This cell is designed such that the input bar is in direct contact with the bulging fluid. Thus, it can be used to apply and measure the bulging pressure. Both quasi-static and dynamic bulge experiments are performed on 0.8 mm thick dual phase steel sheets (DP450). Experimental results are presented for equivalent plastic strain rates ranging from 100 to 700/s. The material parameters of a rate-dependent Cowper-Symonds plasticity model are determined through FE-based inverse analysis.

© EDP Sciences 2009