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Characterization of the non-ideal debris cloud in yaw hypervelocity impact by cylindrical projectile
International Journal of Impact Engineering ( IF 5.1 ) Pub Date : 2021-05-11 , DOI: 10.1016/j.ijimpeng.2021.103908
Chunbo Zhang , Xiaowei Chen , Ye Yuan

This work revisits the classical hypervelocity impact problem of a cylindrical projectile impinging upon a thin plate at an attack angle. A methodology is described to identify the potentially dangerous fragments that can perforate the rear plate in a Whipple shield configuration. The attack angle is re-calculated based on the reported orthogonal view angles, followed by numerical modeling of the hypervelocity impact event using the SPH method in AUTODYN-3D, and the qualitative and quantitative post-processing of the debris cloud generated from the hypervelocity impact. The model predictions are compared to results from the experimental data from the literature for two different attack angles – they will be shown to be in good agreement. The concentrated area of dangerous fragments in the debris cloud is quantified in detail, and its damage mechanism to the rear plate is revealed. The majority of the projectile fragments are located inside the inner cone and the cross-wing of the debris cloud, where the latter bridge connecting the inner cone and the outer bubble, and they are defined according to their geometry shapes being as the components of the debris cloud. The accumulative effect of the two structures are shown to attribute to the potential damage in the rear plate. This work aims to help Whipple shield designers seeking a theoretical method to estimate the threat of yaw hypervelocity impact.



中文翻译:

圆柱形弹丸偏航超高速撞击中非理想碎片云的表征

这项工作重新审视了圆柱形射弹以攻角撞击薄板的经典超高速撞击问题。描述了一种方法来识别可能在 Whipple 盾构配置中刺穿后板的潜在危险碎片。根据报告的正交视角重新计算攻角,然后使用 AUTODYN-3D 中的 SPH 方法对超高速撞击事件进行数值建模,并对超高速撞击产生的碎片云进行定性和定量后处理. 将模型预测与文献中两种不同攻角的实验数据的结果进行比较——它们将被证明具有良好的一致性。碎片云中危险碎片的集中区域被详细量化,并揭示其对后板的损坏机制。大部分抛射物碎片位于碎片云的内锥和横翼内,后者连接内锥和外泡的桥梁,它们根据几何形状定义为碎片云的组成部分。碎片云。两种结构的累积效应被证明归因于后板的潜在损坏。这项工作旨在帮助惠普尔盾牌设计者寻求一种理论方法来估计偏航超高速撞击的威胁。它们是根据它们的几何形状定义的,它们是碎片云的组成部分。两种结构的累积效应被证明归因于后板的潜在损坏。这项工作旨在帮助惠普尔盾牌设计者寻求一种理论方法来估计偏航超高速撞击的威胁。它们是根据它们的几何形状定义的,它们是碎片云的组成部分。两种结构的累积效应被证明归因于后板的潜在损坏。这项工作旨在帮助惠普尔盾牌设计者寻求一种理论方法来估计偏航超高速撞击的威胁。

更新日期:2021-05-28
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