An efficient approach for estimating the elastic characteristics of auxetic lattice plates
by Itthidet Thawon; Duy Vo; Thongchai Fongsamootr; Yuttana Mona; Ramnarong Wanison; Pana Suttakul
International Journal of Agile Systems and Management (IJASM), Vol. 17, No. 4, 2024

Abstract: This research introduces an efficient tool to estimate the bending behaviour of auxetic lattice plates constructed by re-entrant hexagonal unit cells. The homogenisation method based on equivalent strain energy is employed to determine the effective elastic properties, including bending moduli, shear modulus, and Poisson’s ratios. This process is done by analysing a unit cell of each lattice type under periodic boundary conditions using the finite element method. For validation, the equivalent continuous models with the obtained effective properties are compared against high-fidelity finite element models through direct structural analysis. Using this approach illustrates the deployment of the effective properties in addressing related engineering challenges through plate problems. This demonstrates the practical applicability of the proposed method in reducing complex solution processes of actual structural shapes. Employing simulations with equivalent homogeneous plates incurs substantially lower computational costs and reduces modelling time compared to detailed simulations of the original one.

Online publication date: Tue, 08-Oct-2024

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