Bian Xiaobing, Yang Lei, Wang Tao, Huang Guangyan
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Beijing Institute of Technology Chongqing Innovation Centre, Chongqing 401120, China.
Materials (Basel). 2023 Dec 7;16(24):7549. doi: 10.3390/ma16247549.
Explosive shock wave protection is an important issue that urgently needs to be solved in the current military and public security safety fields. Non-metallic protective structures have the characteristics of being lightweight and having low secondary damage, making them an important research object in the field of equivalent protection. In this paper, the numerical simulation was performed to investigate the dynamic mechanical response of non-metallic annular protective structures under the internal blast, which were made by the continuous winding of PE fibers. The impact of various charges, the number of fiber layers, and polyurethane foam on the damage to protective structures was analyzed. The numerical results showed that 120 PE fiber layers could protect 50 g TNT equivalent explosives. However, solely increasing the thickness of fiber layers cannot effectively enhance the protection efficiency. By adding polyurethane foam in the inner layer, the stress acting on the fiber could be effectively reduced. A 30 mm thick polyurethane layer can reduce the equivalent stress of the fiber layer by 41.6%. This paper can provide some reference for the numerical simulations of non-metallic explosion protection structures.
爆炸冲击波防护是当前军事和公共安全领域亟待解决的重要问题。非金属防护结构具有轻质和次生损伤低的特点，使其成为等效防护领域的重要研究对象。本文对由PE纤维连续缠绕制成的非金属环形防护结构在内部爆炸作用下的动态力学响应进行了数值模拟。分析了各种装药、纤维层数和聚氨酯泡沫对防护结构损伤的影响。数值结果表明，120层PE纤维可防护50 g TNT当量炸药。然而，单纯增加纤维层厚度并不能有效提高防护效率。通过在内层添加聚氨酯泡沫，可有效降低作用在纤维上的应力。30 mm厚的聚氨酯层可使纤维层的等效应力降低41.6%。本文可为非金属防爆结构的数值模拟提供一定参考。
