球形破片侵彻明胶运动模型对比研究

A comparative investigation on motion model of spherical fragments penetration into gelatin

为准确描述破片与目标相互作用,揭示致伤机理,将Sturdivan,Segletes,Liu侵彻模型与考虑明胶应变率效应的改进模型进行对比,并分析模型差异.分别选取Ф3,Ф4和Ф4.8 mm球形破片为杀伤元,对破片在明胶中运动规律进行了实验研究.同时,对4种运动模型进行数值计算,并与实验结果进行了对比分析.结果表明,考虑应变率效应的改进运动模型理论值与实测值误差较小,一致性较好,能较为准确描述球形破片在明胶中运动规律,可为轻武器弹药设计和战伤救治提供理论参考.

Gelatin is a popular tissue simulant in biomedical applications. The behavior of a spherical fragment and the effects of penetrating a simulant are similar in biological tissue. In order to accurately describe the interaction between a spherical fragment and muscle tissue,this paper discusses the wounding mechanism and the difference between the Sturdivan model,the Segletes model,the Liu model,and an improved motion model previously established considering the effect of strain rate by us based on the properties of gelatin. In addition,experiments conducted into spherical fragment penetration into gelatin,with fragment diameters 3,4 and 4.8 mm,and acquisition of the corresponding motion law are discussed. Numerical calculations reveal that the motion model has a better fit with experimental values than the Sturdivan,Segletes and Liu models. Further,it more accurately describes the motion of a spherical fragment penetrating gelatin than other models and also has good generality. Thus,it can provide a theoretical reference for small arms ammunition design and wound treatment.