作　　者： ; ; ;

机构地区： 哈尔滨工业大学

出　　处： 《兵工学报》 2012年第8期1009-1015,共7页

摘　　要： 为考察骨料粒径对混凝土材料抗高速破片侵彻的影响,利用轻气炮加速装置和激光测试系统进行素混凝土(PC)和钢纤维增强混凝土(SFPC)侵彻实验研究,通过高速摄像机记录弹体着靶姿态和靶体动态损伤过程。实验中混凝土靶选用5～10 mm、10～15 mm、15～20 mm 3种不同级别骨料粒径,通过对侵彻深度、成坑体积以及靶体碎片剥落过程的比较发现:针对素混凝土靶体,3种级别粒径范围内,级别最大的骨料粒径靶体其抗侵彻能力达到最强;而对于钢纤维含量为1%的钢纤维增强混凝土,粒径级别为10～15 mm的靶体抗侵彻能力最佳,结合骨料粒径对混凝土断裂能的双重作用,表明钢纤维的含量与骨料粒径之间存在一个优化值,在这个优化值配比下,钢纤维增强混凝土抗高速破片的侵彻能力能够达到比较理想的效果。实验结果的讨论分析对混凝土防护工程的设计具有借鉴作用。 In order to investigate the effect of aggregate size on the anti-penetration ability of concrete tar- gets subjected to high-velocity fragments, a two-stage light-gas gun as the accelerate facility and laser light barrier measurement system were employed to conduct the penetration experiments for plain concrete targets and steel fiber-reinforced concrete targets, and the projectile pose and the dynamic damage process of targets were recorded by a high-speed camera. In the experiments, three different aggregate si- zes on 5 - 10 mm, 10 - 15 mm and 15 - 20 mm were involved. The results of penetration depth, crate volume and debris spall processes indicate that the large aggregate size corresponds to the increase of anti- penetration ability for plain concrete targets, but the target with 10 - 15 mm of aggregate size has the opti- mum efficiency in terms of anti-penetration ability when comparing to the other two kinds of concrete tar- gets for steel fiber-reinforced concrete targets with 1% steel fiber in volume. Considered the effect of ag- gregate size on the fracture energy of concrete materials, it indicates that there exists an optimum ratio be- tween the content of steel fber and aggregate size, and under the optimum ratio, the ability of anti-pene- tration of concrete targets can reach the maximum value. The results in this paper is very beneficial to the design of protection engineering.

关 键 词： 爆炸力学 抗侵彻 骨料粒径 高速破片 成坑体积

领　　域： [理学] [理学]