Session: 01-02-01: Adaptive and Multifunctional Structures 1

Paper Number: 158380

158380 - Real-Time Programming of Shear-Axial Mode Ratios in Piezoelectric Metamaterials 

Active mechanical metamaterials with unconventional coupled modes offer opportunities for advanced real-time strain and deformation manipulation. The present study uncovers a novel modified two-dimensional hexagonal lattice architecture with piezoelectric patch-embedded cell walls, enabling tunable shear-axial coupling through external voltage modulation. The normally uncoupled behaviour of typical materials is overcome by the suggested lattice, which accomplishes voltage-dependent mode coupling between normal and shear deformations. An RVE-based finite element modelling in conjunction with a bottom-up mechanics-based methodology is used to assess the elastic characteristics. By improving voltage sensitivity and offering active control over the coupling ratio, the ideal positioning of piezoelectric patches permits real-time mechanical property manipulation. The versatility of this design in obtaining customised mechanical responses is demonstrated by a thorough investigation of lattice geometries, including auxetic and non-auxetic topologies with different height ratios and piezoelectric patch thicknesses. Soft robotics, transformable geometries, morphing structures, and adaptive vibration or wave propagation control are just a few of the cutting-edge applications made attainable by such voltage-tunable coupling capability [1–3]. A revolutionary method for designing active metamaterials is provided by the combination of symmetric lattice geometries with programmable heterogeneous coupling, opening the door to mechanical performance that can be adjusted in real time and on demand in a variety of engineering applications.

Keywords: Active shear-axial coupling ratio, Mechanical coupling, Inverse Piezoelectricity, Mechanical metamaterials.

REFERENCES: 
[1] Mondal S., Mukhopadhyay T., & Naskar S. (2024) Active heterogeneous mode coupling in bi-level multi-physically architected metamaterials for temporal, on-demand and tunable programming, Communications Engineering, Nature Publication (In Press)

[2] Kundu, D., Naskar, S., & Mukhopadhyay, T. (2024). Active mechanical cloaking for unsupervised damage resilience in programmable elastic metamaterials. Philosophical Transactions A, 382(2278), 20230360.

[3] Mukhopadhyay, T., Naskar, S., & Dey, S. (2023). On machine learning assisted data-driven bridging of FSDT and HOZT for high-fidelity uncertainty quantification of laminated composite and sandwich plates. Composite Structures, 304, 116276.

Presenting Author: Soumyadeep Mondal University of Southampton

Presenting Author Biography: I am Soumyadeep Mondal, currently pursuing a Ph.D. in the Department of Aeronautics and Astronautics at the University of Southampton ( United Kingdom, 2023-2027 ). Prior to my Ph.D., I obtained my bachelor's degree ( Bachelor of Technology, B.Tech ) in Mechanical Engineering at the National Institute of Technology Durgapur ( NIT Durgapur, India 2018-22 ) with a First Class Distinction ( CGPA: 9.08 ) and a departmental rank of 6. My research interests span a wide spectrum within the field of advanced materials and structural mechanics, covering Mechanical metamaterials, Smart and bio-inspired materials and structures, Advanced finite element theory, Composite materials, Functionally graded materials, Poroelasticity, Uncertainty quantification etc.