Abstract
In this work, a kind of novel sandwich square tube, filling plate-lattice into square tube, was proposed and preparation by 3D printing. The axial and lateral crushing performances of plate-lattice filled sandwich square tube (PLSST) were investigated by a combined experimental–numerical method. The experimental results were in good agreement with the numerical prediction. The results showed that load bearing and specific energy absorption capability (SEA) of sandwich square tube could be significantly increased by filling plate-lattice under axial and lateral crushing. Reinforcement mechanism is that plate-lattice filler in PLFSST can effectively improve the stability of progressive collapse and alter the compressive deformation mode of PLFSST, resulting in elevating crushing performance and energy absorption capability of PLFSST.
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