An optimisation scheme based on the local interaction simulation approach and Lamb waves for elastic property estimation in multi-layered composites

Issue title: International Conference on Structural Engineering Dynamics – ICEDyn 2011

Article type: Research Article

Authors: Spencer, A.B. | Worden, K. | Staszewski, W.J. | Rongong, J.A. | Sims, N.D.

Affiliations: Dynamics Research Group, Department of Mechanical Engineering, University of Sheffield, Sheffield, UK

Note: [] Corresponding author: K. Worden, Dynamics Research Group, Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom. E-mail: k.worden@sheffield.ac.uk

Abstract: The paper demonstrates the application of guided ultrasonic waves for estimating material elastic properties in multi-layered composite plates. Two-dimensional Lamb wave propagation is modelled using the Local Interaction Simulation Approach (LISA). The wave responses are then used to estimate relevant material properties. This numerical inverse method is based on an optimisation scheme using a Differential Evolution (DE) algorithm. The method is demonstrated on a simulated seven-layered glass fibre-epoxy composite plate. The results show a good agreement between the exact and reconstructed material properties.

Keywords: Glass fibres, layered structures, mechanical properties, computational modelling, ultrasonics

DOI: 10.3233/SAV-2012-0709

Journal: Shock and Vibration, vol. 19, no. 5, pp. 1027-1040, 2012