The paper describes the simulation of impact of jacketed projectiles on steel armour plates using explicit finite element analysis as implemented in LS-DYNA. Validation of numerical modelling includes a comprehensive mesh convergence study leading to insights not previously reported in literature, using shell, solid, and axisymmetric elements for representing target plates. It is shown for a number of cases that with a proper choice of contact algorithm, element size, and strain rate-dependent material properties, computed projectile residual velocities can match closely with corresponding test-based values. The modelling requirements are arrived at by correlating against published test residual velocities' for variants of mild steel plates (designated as MS 1, MS2 and MS3) of different thicknesses at impact velocities in the range of similar to 820-870 m/s. Using the validated numerical procedure, a number of parametric studies such as the effect of projectile shape and geometric aspect ratios as well as plate thickness on residual velocity have been carried out and presented in Part II of the current paper.
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机译:本文描述了使用LS-DYNA中实现的显式有限元分析模拟夹套弹丸对钢质装甲板的冲击。数值建模的验证包括全面的网格收敛性研究,该研究使用壳,实体和轴对称元素表示目标板,从而获得了以前文献中未曾报道的见解。结果表明,在许多情况下,通过适当选择接触算法,单元尺寸和应变率相关的材料特性,计算出的弹丸残余速度可以与相应的基于测试的值紧密匹配。通过将不同厚度的软钢板(分别指定为MS 1,MS2和MS3)的变体在820-870 m / s的冲击速度下与已发布的测试残余速度相关联,从而达到建模要求。使用经过验证的数值程序,已经进行了许多参数研究,例如弹丸形状和几何纵横比以及板厚对残余速度的影响,并在本文的第二部分中进行了介绍。
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