Numerical Simulation of Linear Explosive Formed Penetrator by Endpoint Initiating Manner

Abstract

The formation of linear explosion formed penetrator(LEFP) from linear shaped charge detonated from one end point was studied both theoretically and experimentally, and a numerical simulation was also carried out. By decomposing the detonation velocity vector into spherical and slide components, the theoretical model described the tip velocity change of LEFP. The numerical model illustrated the formation of LEFP and the tip velocity agreed with the theoretical model. The validation of the theoretical and numerical models was verified by experiment, in which steel targets were used to show the effect of LEFP. The results showed that average tip velocity was 2658.4 m/s at 100 mm to the charge mouth. The theoretical and numerical velocity values and distribution curve were very close to the experimental ones. This work may further develop the theory of LEFP and linear shaped charge.

Deformation and Fracture Failure of a High-Speed Long Rod Intercepted by Linear Explosively Formed Penetrators Sequence

“…et al established the steady state analytical equation of motion of LSC jet after LSC detonation based on the Birkhoff theory and studied the shape and velocity of LSC detonation products [ 11 , 12 , 13 , 14 , 15 , 16 ]. In the literature [ 17 , 18 , 19 , 20 , 21 ], the effects of different structural parameters and material properties of LSC on its penetration properties were studied. After designing the LSC with an arc-shaped liner, Ruijun Gou et al established a theoretical model of the LEFP detonation at different initiation positions and discussed the factors affecting its penetration depth [ 21 , 22 ].…”

“…In the literature [ 17 , 18 , 19 , 20 , 21 ], the effects of different structural parameters and material properties of LSC on its penetration properties were studied. After designing the LSC with an arc-shaped liner, Ruijun Gou et al established a theoretical model of the LEFP detonation at different initiation positions and discussed the factors affecting its penetration depth [ 21 , 22 ]. The process of LEFP truncating the long rod can be regarded as the thermomechanical loading process, and the occurrence and propagation of cracks lead to the failure of the long rod.…”