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

作　　者：Dong-mei Yin Bao-ming Li Hong-cheng Xiao 

机构地区：[1]National Key Laboratory of Transient Physics,Nanjing University of Science&Technology,Nanjing,210094,China

出　　处：《Defence Technology（防务技术）》2020年第4期893-899,共7页Defence Technology

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.

关 键 词：RAILGUN BARREL Composite materials Filament winding Winding tension Residual prestress 

分 类 号：TJ866[兵器科学与技术—武器系统与运用工程]