Novel fiber-metal hybrid tubes with overlapped fiber reinforced plastics (FRP) and aluminum layers were proposed in this paper. By combining progressive failure behavior of composites and large plastic deformation of metal materials, the structure was hybridized at mesoscopic scale. To this end, circular fiber/aluminum hybrid tubes with various inner diameters (40, 60, and 80 mm) combined with parent materials (Al-1060, carbon fiber, and glass fiber) were fabricated using vacuum bag molding process. Quasi-static uniaxial compressive tests were conducted to comprehensively explore the effects of geometric factors and failure patterns on energy absorption capability. The experimental results revealed that the pristine FRP and CF/Al (carbon fiber and aluminum) hybrid tubes collapsed in a progressive failure mode and generated abundant intra- and inter-laminar cracks during crushing. The GF/Al (glass fiber and aluminum) hybrid tubes with large diameters collapsed in an unstable and inefficient mode due to local buckling and delamination. Compared with bare aluminum tubes (Al 6061-T6), the specific energy absorption (SEA) and crushing force efficiency (CFE) of CF/Al hybrid structures were improved significantly by respectively 54.3% and 40.4% for tubes with 40 mm inner diameter. Furthermore, the CFE of CF/Al hybrid structures improved by more than 40% when compared to their bare CFRP counterparts, though the SEA reduced by more than 5.5%. In sum, the proposed hybrid design efficiently reduced the peak crushing force with desirable SEA, which has great potential for low-cost and lightweight energy absorber applications.

本文提出了具有重叠的纤维增强塑料（FRP）和铝层的新型纤维金属混合管。通过结合复合材料的渐进破坏行为和金属材料的大塑性变形，该结构在介观尺度下得以混合。为此，使用真空袋模制工艺制造了具有各种内径（40、60和80 mm）并与母材（Al-1060，碳纤维和玻璃纤维）结合的圆形纤维/铝混合管。进行了准静态单轴压缩试验，以全面探讨几何因素和破坏模式对能量吸收能力的影响。实验结果表明，原始的FRP和CF / Al（碳纤维和铝）混合管以渐进破坏模式塌陷，并在破碎过程中产生大量的层内和层间裂纹。大直径的GF / Al（玻璃纤维和铝）混合管由于局部屈曲和分层而以不稳定和低效的方式塌陷。与裸铝管（Al 6061-T6）相比，内径40 mm的CF / Al混合结构的比能量吸收（SEA）和破碎力效率（CFE）分别显着提高了54.3％和40.4％。此外，与SE / CF相比，CF / Al混合结构的C​​FE改善了40％以上，尽管SEA降低了5.5％以上。总共，