摘要
苯乙烯-乙烯-丁烯-苯乙烯(Styrene Ethylene Butylene Styrene,SEBS)嵌段共聚物与白油混合制成的凝胶拥有与弹道明胶类似的性质,且相比于弹道明胶,具有良好的温度稳定性、优异的透明度和耐老化性能。为了研究SEBS凝胶替代弹道明胶进行创伤弹道试验的可行性,对其力学特性进行全面测量。采用万能材料试验机和改进的霍普金森压杆对4种质量分数(15%、20%、25%和30%)SEBS凝胶进行准静态和动态力学特性的测试,研究共聚物含量对凝胶力学性能的影响,并与10%和20%弹道明胶力学性能进行对比,以确定与弹道明胶力学性能最为接近的质量分数。采用5.8 mm步枪弹直接侵彻3种质量分数(15%、20%和25%)SEBS凝胶,通过高速摄影机拍摄弹丸运动姿态和靶标内瞬时空腔演化过程,并与侵彻10%质量分数弹道明胶试验结果进行对比。试验结果表明:准静态压缩下10%弹道明胶的应力-应变曲线介于15%和20%SEBS凝胶之间,20%弹道明胶的应力-应变曲线介于20%和25%SEBS凝胶之间,高应变率下20%和30%SEBS凝胶力学特性分别与10%和20%弹道明胶接近;15%SEBS凝胶的最大空腔直径与10%弹道明胶最为接近,但空腔的膨胀和收缩速度高于弹道明胶;所得研究成果可为SEBS凝胶替代弹道明胶作为新的软组织替代物提供数据支撑。
The gel made of styrene-ethylene-butylene-styrene(SEBS)block copolymer and white oil has similar properties to ballistic gelatin.Compared with ballistic gelatin,it has good temperature stability,excellent transparency,and aging resistance.The mechanical properties are comprehensively measured to investigate the feasibility of using SEBS gel as a substitute for ballistic gelatin in trauma ballistic test.First,the quasi-static and dynamic mechanical properties of SEBS gels with four different mass fractions(15%,20%,25%,and 30%)are tested using a universal material testing machine and an improved Hopkinson pressure bar to study the impact of copolymer content on the mechanical properties of the gel.The mechanical properties of SEBS gel are compared with those of 10%and 20%ballistic gelatins to determine the mass fraction that is most similar to the mechanical properties of ballistic gelatin.Then,SEBS gels with three different mass fractions(15%,20%,and 25%)are penetratedusing 5.8 mm rifle bullets,and the moving postureof bullet and the temporal cavity evolution of a target are recorded by high-speed photography.The experimental results of SEBS gel are compared with those of the ballistic gelatin with 10%mass fraction.The test results show that the stress-strain curve of 10%ballistic gelatin is between those of 15%and 20%SEBS gels,and the stress-strain curve of 20%ballistic gelatin is between those of 20%and 25%SEBS gels under quasi-static compression.The mechanical properties of 20%and 30%SEBS gels are similar to those of 10%and 20%ballistic gelatins,respectively,at high strain rates.The maximum cavity diameter of 15%SEBS gel is closest to that of the 10%ballistic gelatin,but the cavity expansion and contraction rates of SEBS gel are higher than those of ballistic gelatin.This study provides data support for the replacement of ballistic gelatin with SEBS gel as a new soft tissue substitute.
作者
徐浩然
温垚珂
董方栋
覃彬
沈鲁豫
XU Haoran;WEN Yaoke;DONG Fangdong;QIN Bin;SHEN Luyu(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Key Laboratory of Transient Impact Technology,Beijing 102202,China;208th Research Institute,China North Industries Group Corporation,Beijing 102202,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第11期4071-4080,共10页
Acta Armamentarii
基金
国家自然科学基金“叶企孙”科学基金项目(U2241273)
国防科技重点实验室基金项目(6124606221101)
军委科技委基础加强计划技术领域基金项目(2020-JCJQ-JJ-403)。
关键词
弹道
热塑性弹性体
软组织替代物
霍普金森压杆
弹道明胶
力学性能
ballistic
thermoplastic elastomer
soft tissue substitute
split Hopkinson pressure bar
ballistic gelatin
mechanical property
作者简介
通信作者:温垚珂,wenyk2011@163.com。
