中远距离枪击钢化玻璃弹孔特征研究

Characterization of Shot Holes Engendered with Shooting Toughened Glasses from Medium or Long Distance

目的总结枪击钢化玻璃弹孔特征,以期区分发射枪种范围,为快速侦破案件提供线索。方法利用不同动能区间的枪支枪击钢化玻璃制作样本,测量和分析弹孔直径、弹孔形态,研究总结钢化玻璃弹孔特征。结果钢化玻璃弹孔直径、弹孔形态与发射枪种的弹头动能、弹头材质和弹头速度具有相关性。射击弹头动能越高,弹孔直径越大;披甲铅芯弹比披甲钢芯弹枪击钢化玻璃产生的弹孔直径要大;射击弹头速度较小时,弹孔边缘为圆形,弹孔断面四周比较光滑;射击弹头速度较大时,弹孔边缘为不规则圆形,弹孔断面比较粗糙。结论通过分析弹孔直径和弹孔形态,可以大致确定发射枪支的弹头动能、弹头材质和弹头速度,为区分发射枪种缩小范围。

Objective To characterize the shot holes engendered with shooting the toughened glasses from medium or long distance so that the shooting guns can be categorized into certain or likely types for the relevant cases to be quickly solved with the provided clues.Method At the medium or long distance,the toughened glasses were shot with guns of different kinetic energy.The shot holes were measured of their diameters and shapes.Results In the medium or long distance,shot holes are of both diameters and shapes relevant to the used bullets of kinetic energy,material and speed.The higher the kinetic energy of the bullet,the bigger the diameter of the shot hole.The armored lead core bullets make larger holes than the armored steel core ones.If the velocity of bullet is smaller,the shot hole tends to have round edge and smooth section.Conversely,when the velocity of bullet is bigger,the shot hole shows an irregular round and rough section.Conclusions By analysis of the shot hole＇s diameter and shape,the bullet can be roughly defined of its kinetic energy,material and speed,thereby narrowing the scope for the pistol to distinguish its type.