Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb
ISSN: 1355-2546
Article publication date: 9 January 2024
Issue publication date: 23 February 2024
Abstract
Purpose
Auxetics metamaterials show high performance in their specific characteristics, while the absolute stiffness and strength are much weaker due to substantial porosity. This paper aims to propose a novel auxetic honeycomb structure manufactured using selective laser melting and study the enhanced mechanical performance when subjected to in-plane compression loading.
Design/methodology/approach
A novel composite structure was designed and fabricated on the basis of an arrowhead auxetic honeycomb and filled with polyurethane foam. The deformation mechanism and mechanical responses of the structure with different structural parameters were investigated experimentally and numerically. With the verified simulation models, the effects of parameters on compression strength and energy absorption characteristics were further discussed through parametric analysis.
Findings
A good agreement was achieved between the experimental and simulation results, showing an evidently enhanced compression strength and energy absorption capacity. The interaction between the auxetic honeycomb and foam reveals to exploit a reinforcement effect on the compression performance. The parametric analysis indicates that the composite with smaller included angel and higher foam density exhibits higher plateau stress and better specific energy absorption, while increasing strut thickness is undesirable for high energy absorption efficiency.
Originality/value
The results of this study served to demonstrate an enhanced mechanical performance for the foam filled auxetic honeycomb, which is expected to be exploited with applications in aerospace, automobile, civil engineering and protective devices. The findings of this study can provide numerical and experimental references for the design of structural parameters.
Keywords
Acknowledgements
The authors would like to thank the funding support from the National Natural Science and Foundation of China (Grant No. 52202444, Grant No. 51975295), the Industry-University-Research Funds of Jiangsu Province (Grant No. BY20221165).
Declaration of competing interest: The authors declare no conflict of interest.
Citation
Wu, C., Ye, G., Zhao, Y., Ye, B., Wang, T., Wang, L. and Zhang, Z. (2024), "Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb", Rapid Prototyping Journal, Vol. 30 No. 3, pp. 502-512. https://doi.org/10.1108/RPJ-08-2023-0267
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited