长杆弹撞击装甲陶瓷的界面击溃效应数值模拟

利用动力有限元软件AUTODYN模拟了长杆弹撞击装甲陶瓷的界面击溃效应及其影响因素。在验证计算模型、参数及算法可靠的基础上，模拟研究了长杆弹头部形状、盖板、陶瓷预应力等对界面击溃效应的影响规律。结果表明:平头、球形和锥形头部形状长杆弹界面击溃/侵彻转变速度有显著差异；增加盖板及对陶瓷施加预应力均可减小陶瓷的损伤破坏程度，提高陶瓷的界面击溃/侵彻转变速度，提高装甲陶瓷抗弹能力。利用动力有限元软件AUTODYN模拟了长杆弹撞击装甲陶瓷的界面击溃效应及其影响因素。在验证计算模型、参数及算法可靠的基础上，模拟研究了长杆弹头部形状、盖板、陶瓷预应力等对界面击溃效应的影响规律。结果表明:平头、球形和锥形头部形状长杆弹界面击溃/侵彻转变速度有显著差异；增加盖板及对陶瓷施加预应力均可减小陶瓷的损伤破坏程度，提高陶瓷的界面击溃/侵彻转变速度，提高装甲陶瓷抗弹能力。

Numerical Simulation on Interface Defeat of Ceramic Armor Impacted by Long-rod Projectile

A numerical simulation model for ceramic target impacted by long-rod projectile (LRP) is established to investigate the influence of several factors on the interface defeat of ceramic armor by using finite element software AUTODYN. The reliabilities of parameters and algorithms of simulation method are verified. The main factors, such as LRP nose shape, cover plate and pre-stress of ceramics, are simulated in two-dimensional computational studies. The simulated results show that three nose-shapes of LRP have significant effects on interface defeat/penetration transition velocity. The degree of damage on the ceramic can be decreased and the interface defeat/penetration transition velocity can be improved by adding a cover plate and applying a pre-stress on ceramic.