Investigations on the response of ceramic ball aggregated and steel fibre reinforced geopolymer-based ultra-high performance concrete (G-UHPC) to projectile penetration
Investigations on the response of ceramic ball aggregated and steel fibre reinforced geopolymer-based ultra-high performance concrete (G-UHPC) to projectile penetration
复制标题
陶瓷球骨料和钢纤维增强地聚合物基超高性能混凝土（G-UHPC）对弹丸侵彻响应的研究
DOI：
10.1016/j.compstruct.2020.112983
复制
发表时间：
2021-01-01
影响因子：
6.3
通讯作者：
Chen, Gang
中科院分区：
文献类型：
--
作者：
Liu, Jian;Wu, Chengqing;Chen, Gang
本文介绍了陶瓷球骨料和钢纤维增强地质聚合物基超高性能混凝土（G-UHPC）靶材抗弹丸冲击性能的实验和数值研究。与普通 G-UHPC 相比，陶瓷球聚合 G-UHPC 增强了裂纹扩展、弹坑损伤和侵彻深度 (DOP) 方面的弹丸冲击性能。如果同时使用钢纤维和陶瓷球，则可以观察到弹丸抗冲击性的进一步改善。然后使用有限元软件 LS-DYNA 中的 HJC 本构模型进行数值模拟，以进一步了解弹丸对 G-UHPC 目标的影响。获得了数值模拟的 DOP、弹丸速度和位移历史，然后通过与现有模型进行比较进行验证。 20 vol% 陶瓷球聚合和 1.5 vol% 钢纤维增强 G-UHPC 的数值穿孔极限分别为 568 m/s 时的 240 mm 和 798 m/s 时的 380 mm。
This paper presents experimental and numerical studies on projectile impact resistance of ceramic ball aggregated and steel fibre reinforced geopolymer-based ultra-high performance concrete (G-UHPC) targets. Compared with plain G-UHPC, ceramic ball aggregated G-UHPC enhanced projectile impact resistance regarding crack propagation, crater damage and depth of penetration (DOP). A further improvement of projectile impact resistance was observed if a combined addition of steel fibres and ceramic balls was used. Numerical simulations were then performed to further comprehend the projectile impact on G-UHPC targets using the HJC constitutive model in the finite element software LS-DYNA. Numerically simulated DOP, projectile velocity and displacement histories were obtained and then validated through comparing with the existing models. The numerical perforation limits for 20 vol-% ceramic ball aggregated and 1.5 vol-% steel fibre reinforced G-UHPC were 240 mm at 568 m/s and 380 mm at 798 m/s, respectively.