摘要
采用金属内衬外部缠绕纤维增强复合材料,可减轻纯金属身管重量,提高身管刚度。为分析复合材料身管高温火药燃气热冲击作用影响,采用有限元数值方法,考虑温度场和应力场相互影响,进行结构热弹性直接耦合计算,得到了复合材料身管二维瞬态温度场和应力场。结果显示,由于复合材料的各向异性及与金属导热性能的差异,连续射击时的复合材料身管内应力规律很复杂,热应力影响相当重要,不可忽略,研究结果论证了复合材料身管的设计方案的可行性,为实弹射击实验提供了理论计算依据。
It is obvious that the total mass of the tube will be reduced and the elastic-plastic strength and the dynamic property will be increased if part of the metal was replaced by composite material. In order to study the influence of the transient impact of powder gas with high temperature and high pressure on the composite material barrel,by using finite element method, considers the interactional relation between the temperature field and dynamic stress field, the direct coupling analysis is employed, the variation regularity of the two-dimensional temperature field and dynamic stress field of the composite material barrel on firing is obtained. The result demonstrates the feasibility of composite barrel design scheme, and provides the theoretical calculation basis for the firing experiment.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2008年第6期11-16,共6页
Fiber Reinforced Plastics/Composites
基金
国防科技重点预研基金项目
关键词
复合材料身管
热弹性
有限元
composite material barrel
thermo-elasticity
finite element method
