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Investigations on the quasi-static/dynamic mechanical properties of 3D printed random honeycombs under in-plane compression by Geng Luo; Chengpeng Chai; Yisong Chen; Lang Li; Pu Xue is a Engineering article available to read on EtoBox.

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The aim of this study was to reveal the effects of inertia and base material strain rate on the mechanical properties of 3D-printed random honeycombs. First, random honeycombs were established with various mesostructural parameters based on the Voronoi technique and then manufactured by 3D printing. Quasi-static compression tests were performed using a universal test machine. The results indicated that the random honeycombs exhibited a more uniform deformation mode which led to a gentle stress-strain curve when compared with the regular honeycombs. Furthermore, the strain rate effect of the base material was determined by Split Hopkinson Pressure Bar (SHPB) tests. Finite element models considering the base material strain rate were verified by the quasi-static compression and drop weight impact tests. Dynamic simulations were carried out to determine the critical velocity between the deformation mode and clarify its mechanisms. The second critical velocities increase as the cell size and cell wall thickness increased or as the strain rate effect of the base material is considered. The effects of inertia and base material strain rate on the mechanical properties were discussed. The

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Author

Geng Luo; Chengpeng Chai; Yisong Chen; Lang Li; Pu Xue

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)