J. Phys. IV France
Volume 110, September 2003
Page(s) 785 - 790

J. Phys. IV France
110 (2003) 785
DOI: 10.1051/jp4:20020789

Wide range shock wave data for polyester syntactic foams

J. Ribeiro, J. Campos, R. Mendes and I. Plaksin

Laboratory of Energetic and Detonic, Mechanical Engineering Department, Pinhal de Marrocos, Polo II, 3030 Coimbra, Portugal

Shock wave loading experiments of syntactic foams [SF] samples, performed either by explosive detonation or flyer plate impact, were done in order to determine, using the impedance matching technique, their Hugoniot curve. For that propose an original experimental technique, developed in our Laboratory during the last six years have been used. This technique, that has as main element an optical fibber strip with 64 independent channels (250  $\mu$m of diameter each), allow the evaluation in a quasi-continuously way of the wave propagation velocity for run distances up to 16 mm. Samples with three different initial densities were considered for this study, 0.642, 0.849 e 0.970 g/cm 3. The results obtained present a significant variation with the initial specific mass and can be described with appreciable precision by the Thouvenin/Hofmann model while the concordance between the experimental results and the Grüneisen model seems to be very dependent on the Grüneisen coefficient values.

© EDP Sciences 2003