Abstract:Lightweight sandwich structures with high strength and high energy absorption ability are of paramount importance in the mechanical field. An elastic damping unit structure based on SLM (laser selective melting) technology is proposed, which can generate large elastic deformation when loaded, so that a large amount of energy is absorbed in the elastic deformation stage. According to the characteristics of SLM process, the structure and layout of the elastic damping unit are designed, and the manufacturability constraints are studied. Finally, three sets of elastic damping units with different structural parameters and the Kagome structure with the same height were processed by SLM technology, and the compression test was carried out. According to the test results, the influence of unit structure parameters on its bearing capacity and energy absorption capacity was analyzed, and the difference of elastic damping unit and Kagome structure performance was compared. The test results show that the strength and energy absorption capacity of elastic damping unit are better than Kagome, and when the parameters are a=2.2 mm, m=3.1 mm, n=4.6 mm, at the same weight, the strength of the elastic damping unit is about 36.11% higher than that of the Kagome structure, the energy absorbed at the time of failure is about 26.83% higher than that of the Kagome structure, and the energy absorbed during elastic deformation is about 39.1% higher than that of the Kagome structure.
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