基于犰狳外壳仿生的SiC-超高分子量聚乙烯柔性防护板的试验测试和有限元模拟

Experimental testing and finite element simulation of SiC-ultrahigh molecular weight polyethylene flexible protective plate inspired by armadillo shell

  • 摘要: 个体防护装甲的发展对提高单兵作战能力具有重要意义,基于仿生研究可以为设计高性能装甲提供新的思路。犰狳外壳由六边形鳞片紧密拼接而成,采用分层结构设计,具有很好的柔性和防护能力。本文借鉴犰狳外壳的几何排列模式,采用SiC陶瓷片模仿硬质壳层,超高分子量聚乙烯(UHMWPE)热压板模仿软质壳层,按1∶1厚度比例设计制备仿生复合鳞片,将仿生鳞片紧密排列后封装制成一种新型柔性复合防弹插板。为了验证该种防弹插板的防弹性能并研究其破坏特征,进行弹道极限V0试验测试,结合有限元模拟分析其抗7.62 mm手枪弹侵彻的能力。结果表明:该柔性防弹插板不仅满足防弹性能要求,且具备较好的柔性,可为今后新型防弹插板的设计和优化提供参考。

     

    Abstract: The improvement of body armor can significantly enhance the individual fighting ability, and bio-mimic can provide new idea for the design of high-performance body armor. The shell of armadillo is made of hexagonal scales closely joined together, with a layered structure, which has high flexibility and protective capacity. The geometric assembly mode of armadillo shell was adopted, and the hard layer and soft layer were simulated with the SiC ceramic and ultrahigh molecular weight polyethylene(UHMWPE) hot-compressed plate, respectively. The thickness ratio of two layers was chosen as 1∶1 for the design and fabrication of bionic composite scales. and the bionic scales were closely arranged together to form a new type flexible ballistic plate. In order to examine the actual ballistic performance and characterize the damage modes of the ballistic plate, ballistic testing was conducted to investigate the ballistic limit. Meanwhile, the finite element model was built to analyze the penetration resistance of the ballistic plate against 7.62 mm handgun bullets. The results indicate that the new ballistic plate not only meets the requirements in terms of ballistic performance, but also has good flexibility, which can provide a reference for the design and optimization of new types of ballistic plate in the future.

     

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