TITLE

Process of shock attenuation inside a hollow glass microsphere/polymeric composite media

AUTHOR(S)
Ribeiro, J.; Plaksin, I.; Campos, J.; Mendes, R.; Go´is, J.
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p559
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The shock wave (SW) structure and its attenuation process, in the pressure range of 0.1 to 5 GPa inside a composite material (CM), is presented. The CM is based in a thermoset resin (TR) of polyester having, as inert filler, hollow glass micro-spheres (HGM) enclosing an inert gas. This kind of CM, known as syntactic foam, presents very interesting properties for shock absorption applications. The used HGM have density of 256 kg/m[SUP3], a wall thickness of μm and a mean gas cavity diameter of 78 μm. They are dispersed inside the TR, in three different mass ratios (5/100, 10/100 and 25/100). An explosive plane wave generator has been used for sample shock loading. A thin multifibre optical strip, connected to an electronic streak camera, allowed the measurement of the SW velocity, with spatial resolution less than 250 μm and the observation, in real time, with a nanosecond temporal resolution, of the shock front irregularities. The results allow the establishment of the pressure-shock velocity evolutions and the evaluation of the shock attenuation, as a function of the HGM/TR mass ratio.
ACCESSION #
5985460

 

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