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Cuttlebone-inspired honeycomb structure realizing good out-of-plane compressive performances validated by DLP additive manufacturing
Highlights Cuttlebone-inspired honeycomb with asymmetric sinusoidal walls is first proposed. Effect of the wall amplitude and gradience on the crushing performances are revealed. The mechanism of honeycomb is fully studied through FEM and the elastic theory.
Abstract Inspired by cuttlebone microstructure, this study proposes a novel bionic square-tube cuttlebone-inspired honeycomb (S-CIH) structure prepared by digital light processing (DLP) method. Fifteen configurations of honeycombs of same mass including S-CIH, regular honeycomb (S-RH) and sinusoidal honeycomb (S-SH) structures are evaluated and compared in terms of the deformation behavior and compressive performances under out-of-plane compression, especially energy-absorbing capacity. The results indicate that the S-CIH structure achieves the improved energy absorption 8.859 J/g, over 40 % and 60 % than that of S-RH and S-SH structure with same relative density and mass, respectively. The mechanism analysis of the asymmetric corrugated walls disposed in cross and parallel in S-CIH, reveals that the magnitude of amplitude determines the buckling mode thus folding mode of walls, and the magnitude of amplitude gradient determines whether the whole honeycomb structure can achieve a progressive failure. Optimal structural ratio can enable S-CIH delay the complete failure and improve the long-term failure-resistance. This indicates that S-CIH design has the potential ability to strengthen and toughen other brittle matrix materials, and the cuttlebone-like architecture provides a new biological design of mechanically efficient meta-honeycomb beyond conventional honeycomb structure.
Graphical abstract Display Omitted
Cuttlebone-inspired honeycomb structure realizing good out-of-plane compressive performances validated by DLP additive manufacturing
Highlights Cuttlebone-inspired honeycomb with asymmetric sinusoidal walls is first proposed. Effect of the wall amplitude and gradience on the crushing performances are revealed. The mechanism of honeycomb is fully studied through FEM and the elastic theory.
Abstract Inspired by cuttlebone microstructure, this study proposes a novel bionic square-tube cuttlebone-inspired honeycomb (S-CIH) structure prepared by digital light processing (DLP) method. Fifteen configurations of honeycombs of same mass including S-CIH, regular honeycomb (S-RH) and sinusoidal honeycomb (S-SH) structures are evaluated and compared in terms of the deformation behavior and compressive performances under out-of-plane compression, especially energy-absorbing capacity. The results indicate that the S-CIH structure achieves the improved energy absorption 8.859 J/g, over 40 % and 60 % than that of S-RH and S-SH structure with same relative density and mass, respectively. The mechanism analysis of the asymmetric corrugated walls disposed in cross and parallel in S-CIH, reveals that the magnitude of amplitude determines the buckling mode thus folding mode of walls, and the magnitude of amplitude gradient determines whether the whole honeycomb structure can achieve a progressive failure. Optimal structural ratio can enable S-CIH delay the complete failure and improve the long-term failure-resistance. This indicates that S-CIH design has the potential ability to strengthen and toughen other brittle matrix materials, and the cuttlebone-like architecture provides a new biological design of mechanically efficient meta-honeycomb beyond conventional honeycomb structure.
Graphical abstract Display Omitted
Cuttlebone-inspired honeycomb structure realizing good out-of-plane compressive performances validated by DLP additive manufacturing
Thin-Walled Structures ; 198
2024-03-03
Article (Journal)
Electronic Resource
English
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