J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 609 - 616
Publié en ligne 26 juillet 2006
EURODYMAT 2006 - 8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 609-616

DOI: 10.1051/jp4:2006134094

High strain-rate compression test on metallic foam using a multiple pulse SHPB Apparatus

M. Peroni, L. Peroni and M. Avalle

Dipartimento di Meccanica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

Published online: 26 July 2006

The high strain-rate compressive behaviour of a structural aluminium foam (manufactured by IFAM) has been investigated using both the Split Hopkinson Pressure Bar (SHPB) and the direct impact tests. The tests have been carried out with the Hopkinson bar set up in the Experimental Mechanics Laboratory of the 2$^{\rm nd}$ Engineering Faculty of the Politecnico di Torino. In order to obtain high level of strain in the specimen (70–80%), a multiple pulse test technique has been developed. With this solution the specimen is subjected, within the same test, to repeated pulses due to the reflection of stress waves in the input bar. A multiple point strain-gage measurement and a third bar positioned after the output bar allow a correct reconstruction of the dynamic stress-strain characteristic of the foam specimen. Correction for wave propagation by means of the Pochhammer-Chree method was used to improve the quality of the response and to correct errors. Tests with strain-rate up to 3000 s - 1 were performed and quasi-static tests comparison has been carried out. The influence of several parameters, especially density, has been examined.

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