A tunable metamaterial using a single beam element with quasi-zero-stiffness characteristics for low-frequency vibration isolation

Author:

Dalela Srajan1,PS Balaji1ORCID,Jena Dibya Prakash2,Leblouba Moussa3ORCID

Affiliation:

1. Materials and Wave Propagation Lab, Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela, India

2. Department of Industrial Design, National Institute of Technology Rourkela, Rourkela, India

3. Department of Civil & Environmental Engineering, College of Engineering, University of Sharjah, Sharjah, United Arab Emirates

Abstract

Quasi-zero-stiffness (QZS) isolators exhibit high-static and low-dynamic stiffness without sacrificing the load-bearing capacity and with the ability to shield the vibration in low-frequency ranges. Most of the current designs possess QZS property using a combination of positive stiffness element with negative stiffness element, increasing the complexity of the model. In the present research, a single-element mechanical metamaterial is tailored to obtain the QZS property. The building block consists of a single elastically-deformed beam, and the static results of the 3D-printed metastructure demonstrate QZS behavior. A mathematical model is developed for studying the nonlinear behavior of the proposed model, and the dynamic equation is solved using Harmonic-Balance method. Further, an experiment is performed to confirm the vibration isolation capability of the proposed model in low-frequency ranges. Stability analysis is performed mathematically using the perturbation analysis. The QZS mechanism obtained here solely depends on the flexible beam’s geometrical configuration, hence making the design strategy material independent.

Funder

Department of Science and Technology, Government of India

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

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