Ti/Al_3Ti金属间化合物基层状复合材料抗侵彻性能数值模拟  

Numerical simulation of ballistic penetration of Ti/Al_3Ti metalintermetallic laminate composites

作　　者：史明东 原梅妮[1] 何小晶 陈贺贺[1] SHI Mingdong;YUAN Meini;HE Xiaojing;CHEN Hehe(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学机电工程学院,太原030051

出　　处：《复合材料学报》2018年第8期2286-2292,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51201155);教育部博士点基金(20101420120006);山西省自然科学基金(2012011019-1)

摘　　要：采用LS-DYNA非线性有限元软件对Ti/Al_3Ti金属间化合物基层状(MIL)复合材料靶板的弹道侵彻过程进行了数值模拟。考察了等厚度下Ti体积分数、层数和材料梯度分布对复合材料抗侵彻性能的影响。结果表明,Ti体积分数约为20%时,靶板的抗侵彻性能最好。随着层数的增加,复合材料靶板的抗侵彻性能逐渐增强;但超过25层后,靶板的抗侵彻性能逐渐趋于稳定。不同铺层结构功能梯度板的抗侵彻性能相差较大,正向铺层梯度板的抗侵彻性能明显优于等厚均质复合材料靶板。The ballistic penetration process of projectile with different initial velocities impacting Ti/Al3Ti metalintermetallic laminate（MIL）composites target was simulated using LS-DYNA nonlinear dynamic explicit finite element code.The effects of the Ti volume fraction,the stack number and the optimal distribution of material on antipenetrating performance of laminated-composite target plate were studied.The results show that the volume fraction of Ti has an important influence on the penetration resistance of the composite target.While up to 20%,it appears the best anti-penetration performance.The ballistic resistance of composite target plate increases with the increase of the layer number.When the layer number exceeds 25,the ballistic performance of composite target plate gradually stabilizes.The anti-penetration performance of the functionally graded plates with different lamination structures is quite different,the positive gradient plates is obviously superior to that of the equal thickness homogeneous plate.

关 键 词：金属间化合物基层状复合材料 弹道侵彻 数值模拟 微观结构 LS-DYNA 

分 类 号：TB331[一般工业技术—材料科学与工程]