A numerical study to quantify delamination damage of composite structures using an inverse method

He, S, Rose, F and Wang, C 2013, 'A numerical study to quantify delamination damage of composite structures using an inverse method', Australian Journal of Multi-disciplinary Engineering, vol. 10, no. 2, pp. 145-153.


Document type: Journal Article
Collection: Journal Articles

Title A numerical study to quantify delamination damage of composite structures using an inverse method
Author(s) He, S
Rose, F
Wang, C
Year 2013
Journal name Australian Journal of Multi-disciplinary Engineering
Volume number 10
Issue number 2
Start page 145
End page 153
Total pages 9
Publisher Engineers Media
Abstract Existing vibration-based approaches for damage detection are qualitative. This paper presents a novel two-step approach for characterisation of laminar damage, such as delamination in composites and thickness reduction in metallic structures due to corrosion damage. This new approach first employs a gapped smoothing method to determine the location from curvature data. The severity of damage is then determined in the second step using an inverse method by matching predictions of finite element analysis with deflection (or curvature) data pertinent to low-frequency vibrational response. An assessment of various approaches for computing curvature reveals that wavelet transform is a promising method for simultaneously removing noise and computing curvature. Numerical simulations show that this new two-step approach is capable of quantifying the size and severity of structural damage to be used as input for a residual strength assessment.
Subject Aerospace Structures
Keyword(s) Delamination
impact damage
composite materials
structural health monitoring
DOI - identifier 10.7158/N13-AC03.2013.10.2
Copyright notice © Engineers Australia
ISSN 1448-8388
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