摘要
制备了以不同超高性能混凝土(UHPC)为基础的功能梯度混凝土(FGC)靶,研究了提高混凝土材料抵抗超高速射流的方法,开展了功能梯度混凝土防护工程材料抗超高速侵彻性能实验及数值模拟。通过射流侵彻试验,采集靶体的损伤分布、子弹破碎程度、侵彻破坏深度和破坏形态等各个方面的实验数据,进而分析功能梯度混凝土靶体的抗超高速侵彻性能;采用ANSYS/AUTODYN建立有限元计算模型,并与射流毁伤实验数据对照,验证了模型正确性;利用AUTODYN软件预测了射流和超高速弹体侵彻耦合破坏的结果。结果表明:功能梯度混凝土靶板能够有效阻挡超高速射流侵彻,侵彻深度为241 mm;通过数值模拟对射流形成以及侵彻靶板过程进行了分析并验证其有效性,误差为3.7%。
Functionally graded concrete(FGC) targets composed of different kinds of ultra-high performance concrete(UHPC) were prepared. Some methods to improve the resistance of concrete materials to ultra-high speed jet were investiaged. The hypervelocity penetration resistance experiment and numerical simulation of functionally graded concrete protective engineering materials were performed. The anti-penetration performance of the functionally graded concrete targets was analyzed according to the aspects of damage distribution, bullet fragmentation degree, penetration damage and fracture pattern of the target by the jet penetration test. The simulated data by a finite element calculation model, established by a software named ANSYS/AUTODYN, were verified with the experimental results of jet penetration. The results show that the FGC targets can effectively block the penetration of hypervelocity jet and the penetration depth is 241 mm. The process of jet formation and penetration was analyzed by numerical simulation and its effectiveness was verified. The simulation error is 3.7%. In additon, the result of coupling damage of jet and hypervelocity projectile penetration was also predicted by a software named AUTODYN.
作者
尹雪祥
赖建中
周捷航
康柠宇
杜龙雨
YIN Xuexiang;LAI Jianzhong;ZHOU Jiehang;KANG Ningyu;DU Longyu(School of Materials Science and Engineering,Nanjing University of Science and Technology.Nanjing 210094,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2021年第11期2435-2449,共15页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金项目(52078253,51678308)。
关键词
超高性能混凝土
功能梯度混凝土
超高速侵彻
射流
有限元模拟
ultra-high performance concrete
functionally graded concrete
hypervelocity penetration
jet
finite element simulation
