浅析枪击钢化玻璃矩形碎块特征

Analysis of the Characteristics of Rectangular Fragments of Toughened Glass Being Shot

目的总结枪击钢化玻璃碎块特征,以期区分发射枪种范围,为快速侦破案件提供线索。方法在相同条件下,利用不同动能区间的枪支枪击同一批次钢化玻璃制作样本,统计矩形碎块的面积大小和个数,研究总结钢化玻璃碎块特征。结果钢化玻璃矩形碎块面积大小和个数与发射枪种的弹头动能具有相关性。射击弹头动能越高,碎块面积越大,碎块个数越少。当撞击点位于钢化玻璃中心时,放射纹区的矩形碎块面积差别不大;当撞击点位于钢化玻璃边框时,距离撞击点较近处边框附近处的矩形碎块面积较小;距离撞击点较远处边框附近处矩形碎块面积较大。结论通过分析矩形碎块面积大小和个数,可以大致确定发射枪支的弹头动能,为区分发射枪种缩小范围。

Objectives To summarize the characteristics of fragments of toughened glass being shot from middle or long distance in order to distinguish the kind of shooting guns for obtaining case clues. Method In the middle or long distance,under the same condition, guns of different kinetic energy range were used to shoot the same batch of toughened glass. The size and number of rectangular fragments were then counted and analyzed. Results The size and number of rectangular fragments were positively related to the kinetic energy. When the impact point was located in the center of toughened glass,the area of broken rectangular fragments was not significantly different. When the impact point was close to the frame of toughened glass, the area of broken rectangle fragments was smaller near the frame, and larger near the border of the impact point. Conclusion By analyzing the size and number of rectangular fragments, the bullet＇s kinetic energy can be determined roughly, which helps narrowing the scope of gun＇s varieties.