DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 381 - 387
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 381-387
DOI: 10.1051/dymat/2009054

A hydro-pneumatic machine for intermediate strain-rates: Set-up, tests and numerical simulations

V. Tarigopula1, C. Albertini2, M. Langseth1, O.S. Hopperstad1 and A.H. Clausen1

1  SIMLab, Centre for Research-based Innovation and Department of Structural Engineering, Norwegian University of Science and Technology, Trondheim, Norway
2  DYNALAB, Ispra, Italy

Published online: 15 September 2009

A hydro-pneumatic machine for performing material tests at intermediate strain-rates is described, and the principle of operation is given. The behaviour and operation of the hydro-pneumatic machine are further evaluated by an analytical model and non-linear finite element analysis. Several tests were conducted on Weldox 460E steel and aluminium alloy 7075 at strain rates from 1 to 150 s−1. A modified Johnson-Cook model was used to represent the material behaviour at high strain rates. Finally, the accuracy of the measurement signals and stress wave reflections in the hydro-pneumatic machine are discussed by comparing the experimental data with results from non-linear finite element analysis.

© EDP Sciences 2009