超高速碰撞碳纤维增强复合材料的数值模拟  

Simulation for Woven CFRP Laminate Subjected to Hypervelocity Impact

作　　者：汪庆桃[1,2] 张庆明[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]国防科学技术大学指挥军官基础教育学院,湖南长沙410071

出　　处：《兵工学报》2009年第S2期116-119,共4页Acta Armamentarii

基　　金：国家自然科学基金资助项目(10772028)

摘　　要：采用AUTODYN流体编码,对钢弹丸以0.14~6.0 km/s的速度撞击碳纤维增强复合材料(CFRP)进行了数值模拟研究。对CFRP板的弹道极限、碎片云形貌、能量吸收特性等进行了分析,其结果与试验吻合较好,这说明数值模型建立合理。数值模拟研究得出以下几个结论:1)当撞击能量大于弹道极限阈值时,CFRP板对动能吸收的百分比趋于一常数;2)当碰撞速度大于1.2 km/s时,等效穿孔直径与碰撞速度呈线性增加关系;3)当碰撞速度大于1.2 km/s时,等效穿孔直径与Christiansen能量参数呈线性增加关系。A numerical simulation for a woven CFRP laminate impacted by a steel sphere at a velocity from 0.14 to 6.0 km/s was carried out using AUTODYN code.The simulation results on the ballistic limit,the percentage of kinetic energy dissipated and the debris cloud for a 6 mm thick woven CFRP laminate coincide better with those of the test.It is concluded that the percentage of kinetic energy dissipated by the laminate tends to constant when the impact energy is larger than the ballistic limit;the equivalent diameter of punching hole increases linearly with impact velocity and is directly proportional to the Christiansen energy parameter when the velocity exceeds 1.2 km/s.

关 键 词：CFRP材料 超高速碰撞 数值模拟 

分 类 号：TB332[一般工业技术—材料科学与工程]