弹体对岩石的侵彻深度  

Penetration depth of rock targets by long rods

作　　者：魏雪英[1] 马淑芳[1] 翟慧娟[1] 

机构地区：[1]长安大学建筑工程学院

出　　处：《长安大学学报（自然科学版）》2004年第5期64-67,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：陕西省自然科学基金项目(2003E215)

摘　　要：采用统一强度理论作为岩石的破坏准则,基于动态空腔膨胀理论研究了弹体侵彻岩石靶时所受的阻力,以及刚性弹体对岩石的侵彻深度,并分析了破坏准则、弹头形状、摩擦系数等因素对侵彻深度的影响,与试验资料进行了比较。结果表明,当弹体初始速度低于1200m·s-1时,采用双剪强度理论的计算结果与试验资料符合较好,该模型是合理的,可作为相关问题研究的参考。The cavity expansion pressure for rock targets was investigated based on the dynamic cylindrical cavity expansion theory. A unified strength theory was suggested for the failure criterion of rock. It can take account of the influence of intermediate principal stress on the material strength. The penetration resistance was derived for three different nose shapes: ogival, hemispherical and conical. The depth of penetration was calculated and compared with the previously published experimental data and a good agreement was observed. The influences of failure criterion, projectile nose shape and friction coefficient on the penetration depth were also studied.

关 键 词：岩石 弹体 统一强度理论 空腔膨胀理论 侵彻深度 

分 类 号：TU452[建筑科学—岩土工程]