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In order to decrease the damage of the explosive initiator under high-g loading, a PTFE tube was designed as energy absorber and used in the initiator. For this purpose, the split Hopkinson pressure bar was firstly performed to test the dynamic mechanical parameters of PTFE material, which were later applied as input data for LS-DYNA simulation program under airgun high-g loading environment. Finally, the damage of both initiator and PTFE were obtained. Results reveal that yield stress, elasticity modulus, and tangent modulus of PTFE are 18 MPa, 2.25 GPa and 134 MPa, respectively. Due to existence of the PTFE tube, the damage of the explosive initiator decreases, and the damage of the initiator decreases gradually with the increase of thickness of the PTFE tube. As well, the energy change of the PTFE tube with the thickness shows that the most suitable thickness is 0.3 mm. Keywords-dynamic mechanics; PTFE, high-g loading; explosive initiator

PTFE Energy Absorber of Explosive Initiator under High-g Loading