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对泡沫铝夹芯双圆管结构的准静态轴压性能进行了实验研究,发现该新型结构的比质量吸能效率远远高于传统的泡沫铝夹芯单管,并接近甚至超过相应的空管结构;其内外管变形模式均与空管不同且受内外管组合的影响。本文讨论了它的变形机理,分析了外管壁厚对其压缩行为的影响,发现增大外管壁厚有利于增大结构的行程利用率,提高结构的比质量能量吸收效率。实验研究还发现,管壁与泡沫铝夹芯间粘合的效果并不明显。
The quasi-static axial compression properties of foam-aluminum sandwich dual-tube structure are studied experimentally and it is found that the specific energy absorption efficiency of the new structure is much higher than that of the conventional aluminum foam single-core tube and close to or even exceed the corresponding empty Tube structure; its internal and external tube deformation modes are different with the empty tube and by the combination of internal and external pipe. This paper discusses its deformation mechanism and analyzes the influence of the thickness of the outer tube on its compression behavior. It is found that increasing the thickness of the outer tube is beneficial to increase the utilization of the structure and to improve the specific mass energy absorption efficiency of the structure. The experimental study also found that the effect of the adhesion between the pipe wall and the aluminum foam core is not obvious.