Perforation modes of double-layered plates with air space struckby a blunt rigid projectile
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摘要: 平头弹贯穿单层金属靶，随着靶厚的增加和弹速的增高，穿甲模式均可能由剪切冲塞向绝热剪切冲塞转换。因此，对于双层或多层靶的穿甲，其不同层的靶板失效模式可能是不同的。本文中对相关的平头弹穿甲Weldox 700E单层及双层间隙式钢靶的实验数据进行分析，讨论其穿甲模式。弹速较高时，贯穿第1层靶发生绝热剪切失效，弹速降低，贯穿第2层靶板发生绝热剪切失效或剪切冲塞失效, 最终失效模式为绝热剪切和剪切冲塞混杂。Abstract: In the cases of the perforation of a single-layered metal plate struck by a blunt rigid projectile, along with the increase of the plate thickness and that of the projectile velocity, the failure mode of the metal plate may transform from shear plugging to adiabatic shear plugging. Therefore, regarding the perforation of double-layered or multi-layered plates, the failure modes of various plates can be quite different. In this work we investigated these different perforation modes by conducting experimental analyses on the perforations of single- and double-layered Weldox E steel plates with air space. Our results indicate that, in the case of a higher initial striking velocity, the failure mode of the first layer plate is adiabatic shear plugging, while that of the second layer plate is adiabatic shear plugging or shear plugging as the striking velocity of the projectile slows down. We conclude that the final failure mode of the double-layered plates is the mixture of both shear plugging and adiabatic shear plugging.
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表 1 实验结果和数值模拟结果
Table 1. Experimental results and numerical simulation results
vi/(m·s-1) vr/(m·s-1) 实验[1] 剪切冲塞模型 绝热剪切冲塞模型 绝热/剪切冲塞混杂模型 第1层 第2层 第1层 第2层 第1层 第2层 400.0 - 317.5 275.8 309.5 254.9 309.5 254.9 380.0 - 300.1 258.3 291.6 235.3 291.6 235.3 360.0 - 282.7 240.5 273.6 214.8 273.6 214.8 351.1 189.9 274.9 232.5 265.4 205.3 265.4 205.3 330.0 - 256.3 213.0 245.9 180.9 245.9 180.9 309.4 89.8 238.0 193.1 226.5 157.2 226.5 157.2 297.0 155.6 226.8 180.7 214.5 143.8 214.5 143.8 296.7 97.7 226.6 180.4 214.2 142.3 214.2 142.3 296.0 - 225.9 179.6 213.5 141.1 213.5 141.1 295.5 - 225.5 179.1 213.0 0 213.0 140.4 282.6 86.4 213.7 165.5 200.2 0 200.2 127.2 270.8 96.6 202.9 152.1 188.1 0 188.1 113.4 269.3 128.4 201.5 150.4 186.6 0 186.6 111.5 261.0 - 193.7 140.1 177.8 0 177.8 96.3 260.3 - 193.1 139.2 177.0 0 177.0 0 259.7 73.3 192.5 138.4 176.3 0 176.3 0 255.0 - 188.1 132.1 171.2 0 171.2 0 251.7 0 184.9 127.3 167.5 0 167.5 0 249.1 101.7 182.4 123.3 164.5 0 164.5 0 244.0 69.6 177.5 114.4 158.6 0 158.6 0 238.0 - 171.7 98.2 151.2 0 151.2 0 237.5 - 171.2 0 150.6 0 150.6 0 225.2 0 159.0 0 133.7 0 133.7 0 
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