Multi-hit ballistic damage characterisation of 304 stainless steel plates with finite elements
Multi-hit ballistic damage characterisation of 304 stainless steel plates with finite elements
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DOI：
10.1016/j.matdes.2014.01.074
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发表时间：
2014-06
影响因子：
8.4
通讯作者：
B. Russell
中科院分区：
文献类型：
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作者：
B. Russell
研究了弹丸对304不锈钢薄板的多次撞击，以评估弹道性能的退化，并表征其内在机理。弹道退化的评估是通过刚性球体在圆形夹紧板上的相同位置的双重撞击来进行的。第二次撞击的极限速度将由前一次撞击的速度改变。使用有限元分析来解释实验结果，并了解导致性能退化的潜在机制。还考虑了强度和延性对单次和多次冲击性能的影响。该模型与实验结果吻合较好。此外，模型中使用的材料参数完全从已发表的作品中获得，不需要进行拟合或校准。本文尝试用运动铰链的动力机构来定量计算薄板的弹道极限高度。主要结论：多次命中性能与单次命中性能成线性关系；强度对提高弹道极限的影响明显大于延性，即使是以韧性为代价的。
Multi-impact of projectiles on thin 304 stainless steel plates is investigated to assess the degradation of ballistic performance, and to characterise the inherent mechanisms. Assessment of ballistic degradation is by means of a double-impact of rigid spheres at the same site on a circular clamped plate. The limiting velocity of the second impact, will be altered by the velocity of the antecedent impact. Finite element analyses were used to elucidate experimental results and understand the underlying mechanisms that give rise to the performance degradation. The effect of strength and ductility on the single and multi-impact performance was also considered. The model captured the experimental results with excellent agreement. Moreover, the material parameters used within the model were exclusively obtained from published works with no fitting or calibration required. An attempt is made to quantify the elevation of the ballistic limit of thin plates by the dynamic mechanism of travelling hinges. Key conclusions: The multi-hit performance scales linearly with the single-hit performance; and strength is a significantly greater effector of increased ballistic limit than ductility, even at the expense of toughness.