Detection of delaminations in AS4/PEEK composite plates using highly nonlinear solitary waves. (1st June 2022)

• Record Type: Journal Article
• Authors: Yoon, Sangyoung; Kim, Guenil; Schiffer, Andreas; Cantwell, Wesley J.; Kim, Eunho; Kim, Tae-Yeon
• Is Part Of: Composite structures. Volume 289(2022)
• Publication Date: 2022-06-01
• Subjects: Non-destructive evaluation -- Granular chain -- Nonlinear waves -- Fiber composite; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2022.115511
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: We experimentally investigate a non-destructive evaluation (NDE) technique to detect defects in an AS4/PEEK fiber-reinforced thermoplastic composite using highly nonlinear solitary waves (HNSWs). HNSWs are generated using an experimental setup of a granular crystal sensor composed of a one-dimensional chain of steel beads. The granular chain is vertically aligned and placed in contact with the surface of the laminated composites containing a defect through the depth of their thickness. The influence of the defect and the defect location in AS4/PEEK is examined by analysing the characteristics (i.e., delay and amplitude) of the reflected HNSWs. Experimental results demonstrate the capability of the proposed HNSW-based NDE scheme in identifying defects in AS4/PEEK laminated composites, offering a low-cost and robust alternative to existing NDE methods.