Technol Health Care. 2021;29(4):735-747. doi: 10.3233/THC-202406.
The protective role of helmet accessories in moderating stress load generated by explosion shock waves of explosive devices is usually neglected.
In the presented study, the protective role of the helmet chinstrap against the impulse and overpressure experienced by the maxillofacial region were examined.
The explosion shock wave and skull interaction were investigated under three different configurations: (1) unprotected skull, (2) skull with helmet (3) skull with helmet and chinstrap. For this purpose, a 3D finite element model (FEM) was constructed to mimic the investigated biomechanics module. Three working conditions were set according to different explosive charges and distances to represent different load conditions. Case 1: 500 mg explosive trinitrotoluene (TNT), 3 cm, case 2: 1000 mg TNT, 3 cm, and case 3: 1000 mg TNT and 6 cm distance to the studied object. The explosion effect was discussed by examining the shock wave stress flow pattern. Three points were selected on the skull and the stress curve of each point position were illustrated for each case study.
The results showed that the helmet chinstrap can reduce the explosive injuries and plays a protective role in the maxillofacial region, especially for the mandible.
通常忽略头盔配件在减轻爆炸装置爆炸冲击波产生的应激负荷方面的保护作用。
在本研究中，研究了头盔帽带对颌面区域所受脉冲和超压的保护作用。
在三种不同配置下研究了爆炸冲击波与颅骨的相互作用：（1）无保护颅骨，（2）带头盔颅骨，（3）带头盔和帽带的颅骨。为此，构建了一个 3D 有限元模型（FEM）来模拟所研究的生物力学模块。根据不同的爆炸物和距离设置了三种工作条件，以代表不同的载荷条件。案例 1：500 毫克三硝基甲苯（TNT）炸药，3 厘米，案例 2：1000 毫克 TNT，3 厘米，案例 3：1000 毫克 TNT 和 6 厘米距离到研究对象。通过检查冲击波的应力流动模式来讨论爆炸效应。在颅骨上选择三个点，并为每个案例研究说明每个点位置的应力曲线。
结果表明，头盔帽带可以减少爆炸伤，并在颌面区域起到保护作用，特别是对下颌骨。
