MECHANICAL PERFORMANCE ANALYSIS ON THE WIRE NETS UNDER STATIC PRESSURE BY RIGID WARHEAD

Wire nets refers to the three-dimensional mesh-structure woven by high-strength steel wire, which has been used in the interception of short-range weapons (such as rocket and mortar shells). To understand the mechanical properties of the interaction between the wire nets and the warhead, combined with the intercepted tests and the fracture feature of the wire nets, the rigid warhead device and the static pressure experimental platform of the wire nets were designed, and the static tests had been carried out for the wire nets pressured by the rigid warhead. The results show that: when the wire nets were downing, the wire nets presented the funnel-shaped deformation on a whole and the diamond-shaped mesh at the contact part between the wire nets and the warhead presented the deformation gradually approaching to the profile shape of the warhead; and the fracture was located at the intersection of the steel wires in the diamond-shaped mesh which was belonged to the contact part. Based on the research of experimental phenomena and relevant results, one theoretical calculation method for static pressure critical force by the rigid warhead was deduced and the reasons of the errors were analyzed. Overall, the theoretical calculation method for the static pressure critical force was in a good agreement with that obtained from the tests and the error was within 10%. The research results can provide a reference for the preliminary design of the wire nets used for intercepting the short-range weapons.