紧型目标模型中全金属外套子弹的减速 - 一种新的方法
C Schyma1, T Neufeldt-Schoeller1, M Glardon1
1Institute of Forensic Medicine of the University of Bern, Murtenstrasse 26, Bern 3008, Switzerland.
Forensic science international
|June 12, 2024
概括
这项研究表明,在弹性凝中的全金属外套 (FMJ) 子弹所传递的能量与临时腔体积成正比. 在凝中的子弹减速是恒定的,受冲击速度和子弹尖端形状的影响.
科学领域:
- 法医科学 法医科学 法医科学
- 生物物理学的生物物理.
- 机械工程 机械工程
背景情况:
- 射弹的伤害潜力与动能转移有关.
- 了解子弹 - 凝相互作用对于伤口弹道学至关重要.
- 全金属克 (FMJ) 子弹是常见的手枪弹子.
研究的目的:
- 为了研究FMJ手枪子弹在凝中的减速.
- 为了将能量转移与临时空洞特征相关联.
- 分析撞击速度和子弹形状对减速的影响.
主要方法:
- 126次试射9mm FMJ子弹,射入凝块 (2-12厘米) 中.
- 高速视频分析 (SA-X2光子摄像机) 用于测量子弹速度和临时空洞 (TC) 尺寸.
- 根据速度损失计算储存的能量.
- 回归分析以确定相关性.
主要成果:
- 在子弹轨迹长度和能量转移之间发现了线性相关性.
- FMJ子弹在凝中表现出高达12厘米的持续减速.
- 较高的撞击速度导致更大的能量损失.
- 临时腔体积与转移的能量成正比.
- 弹头的形状影响了减速特性.
结论:
- 这项研究证实了在凝中的FMJ子弹的持续减速.
- 临时腔体积是能量转移的可靠指标.
- 这种方法可以推进伤口弹道学研究.
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