Developing three-dimensional mechanical metamaterials with tailorable bandgaps for impact mitigation

Zhou，Youchuan1; Ye，Lin2,3; Chen，Yuan2,3

2024-05-10

10.1088/1361-6463/ad2478

Journal of Physics D: Applied Physics   影响因子和分区

0022-3727

1361-6463

A novel three-dimensional mechanical metamaterial with low frequency bandgaps and negative Poisson’s ratio is designed, consisting of a conventional three-dimensional reentrant structure and periodic resonators, with the aim of achieving vibration isolation and impact mitigation. The bandgap characteristic of the proposed metamaterial is determined computationally, and its dispersion diagram exhibits both partial bandgaps and a complete bandgap within a frequency band of interest. The mechanism for bandgap occurrence is characterised as the local resonance of ligaments and resonators, according to a vibration mode analysis. The wave attenuation capacity of the proposed metamaterial is derived numerically and experimentally from semi-infinite and finite-size metamaterial models, showing a good agreement with the predicted bandgap. Additionally, a thorough study on the design flexibility indicates that the bandgap characteristic can be directly tailored by changing the geometrical parameters of the proposed metamaterial. This allows further optimisation of the metamaterial for potential applications. The dynamic performance of the proposed metamaterial under an impact load is investigated by a finite element model. This demonstrates that the metamaterial reduces the transmitted force by a factor of 1.6 (for peak value) and 2.0 (for root mean square value) under a pulse impact with a duration of 0.88 ms. The impact mitigation result obtained from the impact test confirms that the metamaterial shows a mitigation capacity which is approximately 20% better than that of the conventional reentrant structure.

addictive manufacturing impact mitigation mechanical metamaterial wave attenuation

SCI ; EI

英语

通讯

PHYSICS

2-s2.0-85185002308

Scopus

1.School of Aerospace,Mechanical and Mechatronic Engineering,The University of Sydney,Sydney,2006,Australia
2.Shenzhen Key Laboratory of Intelligent Manufacturing for Continuous Carbon Fibre Reinforced Composites,Southern University of Science and Technology,Shenzhen,518055,China
3.School of System Design and Intelligent Manufacturing (SDIM),Southern University of Science and Technology,Shenzhen,China

Zhou，Youchuan,Ye，Lin,Chen，Yuan. Developing three-dimensional mechanical metamaterials with tailorable bandgaps for impact mitigation[J]. Journal of Physics D: Applied Physics,2024,57(19).

Zhou，Youchuan,Ye，Lin,&Chen，Yuan.(2024).Developing three-dimensional mechanical metamaterials with tailorable bandgaps for impact mitigation.Journal of Physics D: Applied Physics,57(19).

Zhou，Youchuan,et al."Developing three-dimensional mechanical metamaterials with tailorable bandgaps for impact mitigation".Journal of Physics D: Applied Physics 57.19(2024).