In this paper Split Hopkinson pressure bar (SHPB) was used for dynamic testing of nickel coated polyurethane hybrid foams.The foams were manufactured by electrodeposition of a nickel coating on Microfibre Cloths the standard open-cell polyurethane foam.High strength aluminium alloy bars instrumented with foil strain-gauges were used for dynamic loading of the specimens.
Experiments were observed using a high-speed camera with frame-rate set to approx.100-150 kfps.Precise synchronisation of the high-speed camera and the strain-gauge record was achieved using a through-beam photoelectric sensor.
Dynamic equilibrium in the specimen was achieved in all measurements.Digital image correlation technique (DIC) was used to evaluate in-plane displacements and deformations of the samples.Specimens of two different dimensions were tested to investigate the collapse of the foam big girls woven hoodies structure under high-speed loading at the specific strain-rate and strain.