A quasi-zero-stiffness elastic metamaterial for energy absorption and shock attenuation. (1st April 2023)

• Record Type: Journal Article
• Authors: Guo, Shuai; Gao, Renjing; Tian, Xiangyu; Liu, Shutian
• Is Part Of: Engineering structures. Volume 280(2023)
• Publication Date: 2023-04-01
• Subjects: Negative stiffness -- Metamaterial -- Energy absorption -- Vibration mitigation; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.115687
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A multi-step quasi-zero-stiffness metamaterial (MS-QZSM) is proposed. A theoretical model for describing the static property of the MS-QZSM is derived. MS-QZSM exhibits multi-step deformation mode and two plateaus during compression. MS-QZSM has the function of energy absorption and shock attenuation. Abstract: A multi-step quasi-zero-stiffness metamaterial (MS-QZSM) is proposed, which exhibits potential applications in various engineering scenarios, such as multi-vibration mitigation and mechanical protection. At the level of the cell, the MS-QZSM is characterized by the elastic ring connected in parallel with two cross-curved beams respectively, which exhibits multiple deformation behaviors and quasi-zero-stiffness phases (force plateaus) under global compression load. Whithin the line elastic range of material, the proposed metamaterial can achieve QZS region. The multi-step QZS features of the MS-QZSM are theoretically analyzed, and validated by experiments and numerical calculations. Furtherly, the MS-QZSM performances of multiple deformation behavior and energy absorption are investigated by loading–unloading compressive experiments and simulations. Experiment results are in agreement with the simulation results, which show that there are two force plateaus and an obvious hysteretic loop. MS-QZSM has no structural damage during deformation, but plastic deformation occurs. In the area of multi-vibration mitigation and mechanical protection, the findings of this study can expand application prospects of metamaterial in engineering structures.