纤维/金属细观混杂薄壁吸能圆管设计与耐撞性能测试

Mesoscopic hybrid design and crashworthiness properties of thin-walled energy-absorbing tubes

  • 摘要: 随着交通事故和能源消耗等问题的日益突显,轻质薄壁吸能结构成为碰撞防护领域重要的研究方向。本研究考虑传统金属材料及复合材料的吸能特点,提出了一种纤维/金属交错铺层的细观混杂复合材料薄壁圆管设计方法。通过非均匀缠绕铺设和一体化成型方法,制备了混杂圆管试样。通过轴向压缩和落锤冲击实验,测试了结构准静态和动态力学响应。采用多种耐撞性能指标量化分析了力学响应曲线,并与金属试样进行了对比。结果表明:纤维/金属细观混杂设计可有效提高薄壁吸能结构的比吸能,降低吸能平台的载荷波动。准静态加载下,碳纤/铝混杂圆管比吸能提升了约54.3%,吸能效率增加至0.8。动态冲击下,玻纤/铝混杂圆管保持了准静态失效模式,比吸能提升了约24.7%,吸能效率保持在0.44。本研究验证了纤维/金属细观混杂铺层在碰撞防护领域的应用潜力,为轻质薄壁吸能结构设计提供了新思路与参考实例。

     

    Abstract: With the increasing issues of traffic accidents and energy security, lightweight thin-walled energy-absorbing structures have emerged as a crucial subject in the field of collision protection. In this research, a novel design for thin-walled mesoscopic hybrid tubes with composite/metal interleaved layers was proposed, considering the mechanical characteristics of metal and composite materials. A series of hybrid samples were fabricated through a non-uniform winding method. The quasi-static and dynamic mechanical responses were tested through axial compression and drop-weight impact experiments. Various crashworthiness indices were utilized to quantitatively analyze the mechanical performances. The results demonstrate that the composite/metal mesoscopic hybrid design effectively enhances the specific energy absorption and reduces the load fluctuation. In the quasi-static loading state, the carbon fiber/aluminum hybrid tubes show an increase in specific energy absorption by approximately 54.3% compared with the aluminum and an energy efficiency improvement to 0.8. In the dynamic impact state, the glass fiber/aluminum hybrid tubes maintain the same failure modes with quasi-static. The specific energy absorption increases by approximately 24.7% and the energy efficiency maintains at 0.44. This research validates the application potential of composite/metal mesoscopic hybrid design in the field of collision protection, providing new insights and reference examples for the lightweight thin-walled energy-absorbing structures.

     

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