Using the characteristic-line method and the spherical wave assumption, the propagation of impact pressure wave front and the subsequent unloading profile can be simulated using the experimental velocity boundary condition. Viscoelastic model is determined by a retardation time of 5.5 10 5 s for high oscillation frequencies and a stress relaxation time of 2.0–4.5 10 7 s for shock wave attenuation. Oscillations at the beginning of the creep-mode of rheological measurement, and byĮxamining the data of published split Hopkinson pressure bar (SHPB) experiments.
#BALLISTICS GELATIN POWDER FREE#
Was adopted, in which the relevant parameters were obtained via fitting the damping free A three-element viscoelastic constitutive model Of considering the gelatin's viscoelasticity. The observed shock wave attenuation indicates the necessity Movement and pressure sensors imbedded in the gelatin block recorded the pressure Non-penetration impact tests of handgun bullets on the 10 wt% ballistic gelatin blockīehind soft armor were carried out in which a high-speed camera recorded the crater's Chinaīallistic gelatins are widely used as a surrogate of biological tissue in blunt trauma tests. Viscoelastic shock wave in ballistic gelatin behind soft body armor Li Liu, Yurun Fann, Wei Li State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, P.R.
Journal of the mechanical behavior of biomedical materials 34 (2014) 199–207
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