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- 2018
Ti/Al3Ti金属间化合物基层状复合材料抗侵彻性能数值模拟
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Abstract:
采用LS-DYNA非线性有限元软件对Ti/Al3Ti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 metal-intermetallic 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 anti-penetrating 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. 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）
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