Applied Mathematics and Mechanics (English Edition) ›› 2025, Vol. 46 ›› Issue (1): 81-100.doi: https://doi.org/10.1007/s10483-025-3200-7

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  • 收稿日期:2024-07-05 修回日期:2024-11-22 出版日期:2025-01-03 发布日期:2025-01-06

A comprehensive investigation on nonlinear vibration andbending characteristics of bio-inspired helicoidallaminated composite structures

S. SAURABH, R. KIRAN(), D. SINGH, R. VAISH, V. S. CHAUHAN   

  1. School of Mechanical and Materials Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
  • Received:2024-07-05 Revised:2024-11-22 Online:2025-01-03 Published:2025-01-06
  • Contact: R. KIRAN E-mail:raj@iitmandi.ac.in

Abstract:

Bio-inspired helicoidal composite laminates, inspired by the intricate helical structures found in nature, present a promising frontier for enhancing the mechanical properties of structural designs. Hence, this study provides a comprehensive investigation into the nonlinear free vibration and nonlinear bending behavior of bio-inspired composite plates. The inverse hyperbolic shear deformation theory (IHSDT) of plates is employed to characterize the displacement field, with the incorporation of Green-Lagrange nonlinearity. The problem is modeled using the C0 finite element method (FEM), and an in-house code is developed in the MATLAB environment to solve it numerically. Various helicoidal layup configurations including helicoidal recursive (HR), helicoidal exponential (HE), helicoidal semi-circular (HS), linear helicoidal (LH), and Fibonacci helicoidal (FH) with different layup sequences and quasi-isotropic configurations are studied. The model is validated, and parametric studies are conducted. These studies investigate the effects of layup configurations, side-to-thickness ratio, modulus ratios, boundary conditions, and loading conditions at different load amplitudes on the nonlinear vibration and nonlinear bending behaviors of bio-inspired composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and nonlinear bending behaviors. Moreover, this influence varies across different side-to-thickness ratios and boundary conditions of the bio-inspired composite plate.

Key words: finite element method (FEM), nonlinear, Green-Lagrange, inverse hyperbolic shear deformation theory (IHSDT), bio-inspired composite plate, helicoidal

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