摘要
基于弹塑性有限元接触理论,引入了弹带材料的初始损伤及累计损伤模型,对弹带挤进、冲击坡膛的过程进行了理论分析,建立了弹带挤进、冲击坡膛的显式非线性有限元模型。对在两种不同结构坡膛条件下的弹带挤进过程进行分析计算,得到了挤进过程弹丸及弹带的动力学响应,并通过计算分析了坡膛结构变化对挤进冲击力的影响,揭示了坡膛裂纹的形成机理。
Based on the elastic-plastic contact finite element theory,a model of the band,constituting the initial damage,progressive damage and failure of material,was introduced.Explicit dynamic finite element model was built and the impacting and engraving process of the band was analyzed.The impacting and engraving processes for two different bore structures were computed and their dynamic responses were obtained.The influence of different bore structures on the impact force was analyzed and the mechanism of crack initiation was revealed.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第3期30-33,共4页
Journal of Vibration and Shock
关键词
坡膛结构
冲击
累计损伤失效
非线性
有限元
bore structure
impact
progressive damage and failure
nonlinearity
FEM
