聚醚酰亚胺长杆弹弹托在膛压载荷下的动力学响应

A dynamic calculation model for launching a long rod projectile was established in this paper, where the sabot used a new type of glass fiber reinforced polyetherimide composite material, and then the dynamic deformation of the sabot under the light gas gun pressure load was analyzed by the LS-DYNA software. The results show that the maximum stress inside the sabot occurs at the maximum bore pressure. The high stress area is distributed on the outer periphery and the root tooth of the sabot tail. The stresses at the tooth root and tooth tip are different with the overplus of material strength at the sabot head. By improving the structure of the sabot, the mass of the sabot is reduced by 16 g with the extra velocity gain of 612.2 m/s at given launching pressure.