Influence of temperature on crater and ejecta size following hypervelocity impact of aluminum alloy spheres on thick aluminum alloy targets
Influence of temperature on crater and ejecta size following hypervelocity impact of aluminum alloy spheres on thick aluminum alloy targets
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DOI：
10.1016/j.ijimpeng.2011.11.006
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发表时间：
2012-04
影响因子：
5.1
通讯作者：
M. Nishida;Koichi. A. Hayashi;J. Nakagawa;Yoshitaka Ito
中科院分区：
文献类型：
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作者：
M. Nishida;Koichi. A. Hayashi;J. Nakagawa;Yoshitaka Ito
使用两级轻气枪研究了温度对厚铝合金靶中弹坑形状和喷射碎片尺寸的影响，冲击速度范围约为 0.9–3.5 km/s。陨石坑的直径、深度和体积随着温度的升高而增加。对见证板的观察表明，高温下喷射物的散射直径和角度略小于低温和室温下的喷射物。仅当撞击速度为 1.5 公里/秒（射弹破碎开始的速度）时，温度才会影响从腔室收集的喷射物碎片的大小和质量。随着温度升高，其对喷射物碎片质量的影响减小。仅当撞击速度为 1.5 km/s 时，温度才会影响喷射物碎片的长度和轴比。无论温度和冲击速度如何，轴比 c/a 均小于 0.6。
The influence of temperature on crater shape and ejecta fragment size in thick aluminum alloy targets was investigated for impact velocities ranging from approximately 0.9–3.5 km/s using a two-stage light-gas gun. The diameter, depth, and volume of the crater increased with increasing temperature. Observation of the witness plates showed that the scatter diameters and angles of the ejecta were slightly smaller at high temperatures than at low and room temperatures. Temperature affected the size and mass of ejecta fragments collected from the chamber only when the impact velocity was 1.5 km/s (the velocity at which the projectile fragmentation started). As the temperature increased, its influence on the mass of ejecta fragments decreased. Temperature affected the length and the axial ratios of ejecta fragments only at an impact velocity of 1.5 km/s. Regardless of the temperature and impact velocity, the axial ratios, c/a, were less than 0.6.