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对空芯蜂窝铝(六边形孔)、聚氨酯、聚氨酯/蜂窝铝复合材料进行压缩试验,分析蜂窝铝和聚氨酯复合后的压缩力学行为及缓冲吸能特性.结果表明:复合材料的应力-应变曲线表现出弹性、屈服和密实三个阶段,初始刚度和屈服应力较空芯蜂窝铝有很大提高;蜂窝铝的加入使聚氨酯的变形回复降低25%;复合材料的最大吸能效率是单纯聚氨酯的1.47倍,且较大应力下复合材料具有比单纯聚氨酯更好的吸能效率;聚氨酯填充1 mm孔径蜂窝铝复合材料的最大吸能效率是聚氨酯填充2 mm孔径蜂窝铝复合材料的1.37倍;加载速率越大,吸能效率的峰值越大,且在达到最大吸能效率时的应力越大.
Compression tests were carried out on hollow cellular honeycomb aluminum (hexagonal holes), polyurethane and polyurethane / honeycomb aluminum composites to analyze the compressive mechanical behaviors and energy absorption and cushioning properties of honeycomb aluminum and polyurethane composites. The results show that the stress- The curve shows elastic, yield and compact three stages, the initial stiffness and yield stress than the hollow core honeycomb has greatly improved; the addition of cellular aluminum polyurethane deformation reduction by 25%; the maximum energy efficiency of the composite is simple polyurethane 1.47 times higher than that of pure polyurethane. The maximum energy absorption efficiency of polyurethane filled 1 mm diameter honeycomb aluminum composite is 1.37 times that of polyurethane filled 2 mm diameter honeycomb aluminum composite. The higher the loading rate, the greater the peak of energy efficiency and the greater the stress at maximum energy efficiency.