Analysis for the residual prestress of composite barrel for railgun with tension winding

Defence Technology

Hong-cheng Xiao¹  Bao-ming Li²  Dong-mei Yin³ 

[1] National Key Laboratory of Transient Physics, Nanjing University of Science &Technology, No.200, Xiaolingwei, Xuanwu District, Nanjing, Jiangsu Province, CN, 210094, China.;;Corresponding author. National Key Laboratory of Transient Physics, Nanjing University of Science &

关键词: Railgun;    Barrel;    Composite materials;    Filament winding;    Winding tension;    Residual prestress;   

DOI  :  

来源: DOAJ

【 摘 要 】

Based on the elastic theory of cylindrical shells and the theory of composite laminates, a prediction model for the residual prestress of the simplified round composite barrel for railgun is established. Only the fibre pretension is considered in this model. A three dimensional numerical simulation for the residual prestress in the railgun barrel is carried out, by combining the temperature differential method with the element birth and death technology. The results obtained by the two methods are compared. It reveals that the distribution trends of residual prestress are consistent. And the difference for residual prestress in the filament wound composite housing of barrel is relatively small. The same finite element method is used to analysis the residual prestress in the non-simplified composite barrels for railgun, which are under different control modes of winding tension. The results mean that the residual prestress in barrel will increase while the taper coefficient for winding is decreasing. Therefore, the sealing performance in bore is improved, but the strength of the filament wound composite housing drops. In addition, the axial and circumferential residual prestress in the filament wound composite housing with constant torque winding are close to the ones in iso-stress design for barrel.

【 授权许可】

Unknown