建立了平纹织物的三维细观几何模型,利用LS-DYNA有限元软件模拟了弹丸冲击的条件下,单层芳纶织物的响应过程.模型的几何形状参考了平纹织物的截面显微镜照片,使建立的模型更加准确,更接近平纹织物真实的结构.纱线模型选用正交各向异性材料,材料参数和失效条件均参考真实的Kevlar织物,并考虑纱线和纱线之间以及纱线和弹丸之间的摩擦.模拟中,通过设定弹丸的撞击速率Vs,得到剩余速率Vr,并由此计算单层织物的弹道极限速率V50.结果表明:织物的变形过程和失效形式在模拟中得到细致的显现,模拟所得结果V50和织物的失效形式与实验结果的一致程度较好.
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