子弹侵彻钢板与织物的有限元模拟分析

Investigation on Penetration of Steel Plate and Fabrics by Bullet Using Finite Element Mehtod

使用LS-DYNA有限元软件,模拟7.62 mm钢芯弹侵彻钢板-织物复合装甲的过程。织物模型为细观模型,纱线模型选用正交各向异性材料,材料几何参数和失效条件参考线密度为133.33 tex的超高分子量聚乙烯织物,并考虑纱线和纱线之间以及纱线和弹丸之间的摩擦。在模拟中,弹丸以720 m/s的速度冲击靶板,钢板、织物的变形和失效过程得到细致显现,并得到弹丸的速度时间曲线。结果表明,10层的织物没能阻止56式钢芯弹的侵彻,但却可以有效阻止钢板碎片的贯穿。

A commercially available finite element analysis code(LS-DYNA)was used to model the dynamics response of steel plate and fabrics under the condition of ballistic impact of a 7.62 mm bullet.A yarn level of resolution is used in the model.Yarns were modeled as orthotropic elastic and the parameter and the failure criteria were refer to the plain-woven 1200 D UHMWPE fabric.Friction between the yarns and bullet were considered.In the modelling the impact velocity of bullet was 293 m/s.Results indicate that the delicate deformation process and failure mechanism of the steel plate and fabric are finely captured,and projectile velocity history was obtained.The results show that the 10 layer fabric can not prevent the penetration of 56 steel core projectile,but can effectively prevent the penetration of steel plate fragments.