Open AccessProtective performance and protective mechanism of SiO2 aerogel under explosive loading
Author(s) -
Jie Yang,
Shukui Li,
Lili Yan,
Fuchi Wang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8934
Subject(s) - aerogel , materials science , attenuation , explosive material , shock wave , shock (circulatory) , composite material , polyvinylidene fluoride , porosity , optics , mechanics , physics , chemistry , medicine , organic chemistry , polymer
The propagation character of shock wave in SiO2 aerogel under explosive loading is studied using a polyvinylidene fluoride piezoelectric sensor. The propagation character of shock wave in aluminum foam is also determined for comparison. The results show that the peak stress of the shock wave follows the exponential attenuation relation with the propagation distance of the shock wave in SiO2 aerogel. The shock wave attenuates more obviously in SiO2 aerogel than in aluminum foam. The special nano-porous network structure of SiO2 aerogel results in better attenuation effect of shock wave in aerogel. The shock wave velocity in SiO2 aerogel is extremly low, thus the chase of the unloading wave leads to the further attenuation of shock wave.