Lightweight meta-lattice sandwich panels for remarkable vibration mitigation: Analytical prediction, numerical analysis and experimental validations. (December 2022)

• Record Type: Journal Article
• Authors: Li, Hao; Hu, Yabin; Chen, Jianlin; Shou, Dahua; Li, Bing
• Is Part Of: Composites. Volume 163(2022)
• Publication Date: 2022-12
• Subjects: A. Sandwich structure -- B. Vibration -- C. Analytical modelling -- E. 3-D Printing; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2022.107218
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: Realizing superior mechanical performance and outstanding multifunction features, yet with lightweight configuration, simultaneously, has been always a fundamental challenge. Here we design and experimentally achieve an ultralight framework of lattice-truss-core sandwich panels, namely meta -lattice structure, for highly-efficient, broadband low-frequency vibration attenuation. A composite meta -lattice sandwich panel is proposed and integrally fabricated with glass fiber reinforced Nylon by the 3D printing technique of selective laser sintering. Requiring neither heavy local-resonators nor soft damping support, the designed meta -lattice structure can generate a wide low-frequency bandgap, where the bandwidth has a remarkable double-time increment, meanwhile the yield strength has a significant improvement. An analytical model based on Rayleigh-energy and Euler-Bernoulli beam theory is presented to tailor the bandgap characteristics. Without losing lightweight superiority, our meta -lattice prototype exhibits absolute advantages in broadband, low-frequency vibration attenuation and high loading-bearing capacity, which offers a thriving avenue to the outstanding integration of structural strength and diverse-function performance.