The effect of the number of carbon-fiber-reinforced plastic (CRFP) layers on the axial crushing capacity of aluminum–CFRP square hybrid tubes was investigated both experimentally and numerically. Increasing the number of CRFP layers led to more collapsed lobes and decreased collapsed lobe widths, resulting in an improvement of the energy absorption capacity. The simulation results revealed a distinct tube wall collapse mode in the 4-layer hybrid tubes. The higher bending stiffness of the composite layers in the 4-layer hybrid tube led to debonding of the interface between the aluminum and composite layers. After interface failure, the composite layers did not collapse following the aluminum tube wall and instead rebounded in the approximate longitudinal direction, which directly suffering the longitudinal crushing loading. This behavior led to the shortened plastic collapse width and improvement of the single-layer CFRP energy dissipation due to CFRP delamination.

通过实验和数值研究了碳纤维增强塑料（CRFP）层数对铝-CFRP方形混合管轴向破碎能力的影响。CRFP层数的增加导致更多的塌陷裂片和减小的塌陷裂片宽度，从而提高了能量吸收能力。仿真结果表明，在4层混合管中有明显的管壁塌陷模式。4层混合管中复合层的较高弯曲刚度导致铝层与复合层之间的界面脱粘。界面破坏后，复合材料层不会沿着铝管壁塌陷，而是在近似纵向的方向上回弹，这直接承受了纵向破碎载荷。