Elliptical Method for Damage Identification in Carbon Fibre Reinforced Polymer Laminates. (29th September 2019)

• Record Type: Journal Article
• Authors: Amafabia, Daerefa-a Mitsheal; Montalvão, Diogo; David-West, Opukuro; Haritos, George
• Other Names: Balitskii Alexander Guest Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2019(2019)
• Publication Date: 2019-09-29
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2019/5237129
• Languages: English
• ISSNs: 1687-8434

Abstract

Abstract : Oftentimes, researchers in the area of vibration-based structural health monitoring (SHM) and damage detection focused their attention on the global properties of structures, which are modal frequencies and modal damping factors. However, the effect on the local properties for SHM, that is, modal constants, has not been extremely explored. In this paper, the elliptical plane modal identification method is proposed to be used as a damage identification method itself. It is observed that when the receptance is plotted in the elliptical plane, the area of the ellipse formed close to the resonant frequencies (which depends on the modal constants) can be used to detect damage, namely, composite carbon fibre reinforced polymer (CFRP) rectangular plates. Although a mathematical correlation has not been established yet, results show that the method is sensitive to the presence of damage in the test plates, as the area of the ellipse changes with damage.