A wave-based numerical scheme for damage detection and identification in two-dimensional composite structures

Apalowo, R.K.; Chronopoulos, D.

Abstract

Previous studies on wave inspection in different propagation directions have focussed on the analysis of wave propagation and wave scattering from various types of joints in two-dimensional monolayered structures. In this work, a Finite Element (FE) based numerical scheme is presented for quantifying wave interaction with localised structural damage within two-dimensional layered composite structures having arbitrary layering, complexities and material characteristics. The scheme discretise a damaged structural medium into a system of N healthy substructures (waveguides) connected through a joint which bears the localised structural damage/discontinuity. Wave propagation constants along different propagation directions of the substructures are sought by combining Periodic Structure Theory (PST) and the FE method. The damaged joint is modelled using standard FE approach, ensuring joint-substructures mesh conformity. This is coupled to the obtained wave propagation constants in order to determine scattering coefficients for the wave interaction with damage in different propagation directions within the structure. Wave interaction coefficients for different damage types and structural parameters are analysed in order to establish an optimum basis for detecting and identifying damage, as well as assessing the orientation and extent of the detected damage. The main advantage of this scheme is precise predictions at a very low computational cost.

Citation

Apalowo, R., & Chronopoulos, D. (2019). A wave-based numerical scheme for damage detection and identification in two-dimensional composite structures. Composite Structures, 214, 164-182. https://doi.org/10.1016/j.compstruct.2019.01.098

• Journal Article Type: Article
• Acceptance Date: Jan 29, 2019
• Online Publication Date: Feb 6, 2019
• Publication Date: Feb 6, 2019
• Deposit Date: Feb 11, 2019
• Publicly Available Date: Feb 11, 2019
• Journal: Composite Structures
• Print ISSN: 0263-8223
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 214
• Pages: 164-182
• DOI: https://doi.org/10.1016/j.compstruct.2019.01.098
• Keywords: Civil and Structural Engineering; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/1537134
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0263822318343095