Horsfall I, Prosser P D, Watson C H, Champion S M
Cranfield University, RMCS Shrivenham, Wilts, UK.
Forensic Sci Int. 1999 Jun 28;102(2-3):79-89. doi: 10.1016/s0379-0738(99)00055-9.
Stab-resistant body armour is now becoming a standard item of equipment for police officers in the United Kingdom. In the UK these are usually required to have a stab resistance as specified by the Police Scientific Development Branch KR42 standard [G. Parker, PSDB Stab Resistant Body Armour Test Procedure, Police Scientific Development Branch, Publication No 10/93, 1993]. There are several other test standards, all of which specify that body armour must resist penetration by a specific blade type delivered at a specific energy level or range of levels. However, the actual range of energy levels specified varies over almost an order of magnitude and the basis for these levels is not clearly defined. This paper describes tests to determine the energy range and characteristics of stabbing actions that might be directed against stab resistant body armour by an assailant. The energy and velocity that can be achieved in stabbing actions has been determined for a number of sample populations. Volunteers were asked to stab a target using an instrumented knife that measured the axial force and acceleration during the stabbing. The maximum energy obtained in underarm stabbing actions was 64 J whilst overarm stabbing actions could produce 115 J. The loads produced on contact with the target often approached 1000 N.
防刺防弹衣如今正成为英国警察的标准装备。在英国，这些防弹衣通常需要具备警察科学发展处KR42标准所规定的防刺性能[G. 帕克，《警察科学发展处防刺防弹衣测试程序》，警察科学发展处，第10/93号出版物，1993年]。还有其他一些测试标准，所有这些标准都规定防弹衣必须能够抵御特定类型的刀片在特定能量水平或能量水平范围内的穿刺。然而，所规定的实际能量水平范围几乎相差一个数量级，而且这些水平的依据并未明确界定。本文描述了旨在确定袭击者可能针对防刺防弹衣实施的刺伤动作的能量范围和特征的测试。针对一些样本群体，已经确定了刺伤动作所能达到的能量和速度。志愿者被要求使用一把装有测量刺伤过程中轴向力和加速度仪器的刀刺向一个目标。腋下刺伤动作所获得的最大能量为64焦耳，而挥臂刺伤动作可产生115焦耳。与目标接触时产生的负荷常常接近1000牛顿。
