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| Experimental and numerical analysis of rigid projectile impacting the mesh of wire nets |
| WANG Min1,2， HUANG Qilin1， ZHOU Shuai1， CUI Lianming1 |
| 1.Department of Military Facilities,Army Logistics Academy,Chongqing 401311,China;
2.Key laboratory of Military Underground Architectural Engineering,Army Logistics Academy,Chongqing 401311, China |
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Abstract According to the characteristics of the interaction between wire nets and short-range weapons (rockets, mortar shells, etc.), the experiment of rigid projectile impacting the mesh of wire nets at low speed was designed and carried out based on the live ammunition tests. The experimental results show that: the mesh of wire nets has obvious contact slip at the intersection of the steel wires on both sides of the transverse direction, and the steel wires at these intersection positions fracture firstly.After the impact, the mesh of the other parts of the wire nets could recover to the initial state, except for the deformation and damage of the mesh in contact with the projectile. Combined with the experimental phenomena of the live ammunition tests and the rigid projectile low speed impact tests, and the static and dynamic test data of high-strength steel wire material, a refined numerical model of wire nets was established by employing the LS-DYNA software, and the numerical analysis of rigid projectile impacting the mesh of wire nets was implemented. The numerical simulation can better predict the interaction between the mesh of wire nets and the rigid projectile, as well as the fracture of the steel wires at the intersection positions of the wire nets. Finally, the factors affecting the interaction between the mesh of the wire nets and the rigid projectile were studied by numerical mothed. The results show that the peak overload force and energy loss of the rigid projectile during the impact of the mesh in the wire nets were related to the caliber and the impact speed of the rigid projectile, not the mass of the rigid projectile; with the increase of the caliber, the peak overload force and the energy loss of the rigid projectile increase; with the increase of the impact speed, the peak overload force of the rigid projectile increases, while the energy loss gradually decreases.
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Received: 17 March 2023
Published: 15 December 2023
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