Computational Mechanics of Kirigami-Inspired Piezoelectric Metastructures for Broadband Multiaxial Vibration Energy Harvesting

  • Zhang, Yaowen (University of Southampton)
  • Naskar, Susmita (University of Southampton)
  • Mukhopadhyay, Tanmoy (University of Southampton)

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This study presents a computational-mechanics analysis of kirigami-inspired three-dimensional piezoelectric metastructures, focusing on how cut topology controls modal behaviour and electromechanical coupling under broadband multi-axial vibration. Conventional piezoelectric energy harvesters show narrow frequency response and low directional sensitivity. Finite-element simulations were performed to examine the influence of slit geometry and orientation on modal density, inter-modal coupling, and strain-energy localisation. Results show that kirigami patterning enhances modal participation and broadens operational bandwidth, improving electromechanical response in agreement with graded and programmable harvester designs \cite{mondal2025frequency}. The study demonstrates a mechanics-informed framework for modelling adaptive metastructures, relevant to nonlinear structural dynamics and multifunctional material design \cite{sharma2025tubular