钢珠弹丸侵彻玻璃的痕迹研究
作者:杜周绩 刘爽 朱亚峰 周毅锦
来源:《科技视界》2017年第17期
【摘 要】钢珠弹丸造成的玻璃破损痕迹在现场中最为常见。由于缺乏可靠的实验数据做支撑,痕迹分析时难以给出弹丸大小及发射状态的判断。本文选用发射钢珠弹丸常用的小型器具:弓弩、弹弓、钢珠枪等,研究钢珠在平板玻璃和钢化玻璃上形成的侵彻痕迹。结果表明,玻璃侵彻痕迹中痕迹类型的组合及中心孔洞大小是判断钢珠直径和速度的依据。平板玻璃上孔洞的形态以及羽毛状痕迹的分布可以明确钢珠的侵彻角度和方向,钢化玻璃上没有出现明显的表征侵彻状态的痕迹特征。
【关键词】钢珠;玻璃;侵彻;痕迹检验
中图分类号: D918.91 文献标识码: A 文章编号: 2095-2457(2017)17-0070-004
Rearch of Penetration Marks on Glass By Steel Ball Projectile
DU Zhou-ji1 LiU Shuang2 ZHU Ya-feng1 ZHOU Yi-jin1
(1.Jiangsu Police Institute,Nanjing Jiangsu 210031,China;
2.Criminal Investigation Detachment Of Xuzhou Public Security Bureau,Xuzhou Jiangsu 221000,China)
【Abstract】Mark evidence on glass caud by the steel ball projectile occurs mostly in crime scene.Due to the lack of reliable experimental data to support,it is difficult to confirm the size of the projectile and the shooting state.The ball projectile commonly ud portable devices,such as crossbow,slingshot,ball gun.Penetration marks on flat glass and tempered glass with the devices were rearched.The results show that the combination of glass penetration marks pattern and the center hole size can be ud to deduce the speed and the diameter of steel ball.The hole shape and the feather-like crack on flat glass can show the ball penetration angle and direction clearly.There is no characteristics of penetration Mark is significant for shooting State of judgment on tempered glass.