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- Title
Investigation of layered composite plates under acoustic emission using an appropriate finite element model.
- Authors
Sengupta, Sanjay; Roy, Parikshit; Topdar, Pijush; Datta, Aloke Kumar
- Abstract
Structural damages generate acoustic emission (AE) in the media and cause extensional and flexural acoustic waves. Often in structures like plates, flexural mode is predominant. In this study, the flexural mode AE waveforms due to simulated damage are studied for multi-layered composite plates. A generalized refined 2D plate theory, which satisfies the transverse shear stress continuity at the layer interfaces, is proposed here for modelling the plates. This formulation is implemented through finite element method (FEM) where a four-node rectangular element, that satisfies C1 continuity, is used. Plates, having different thickness ratios, are studied through numerical examples using the model. Results are validated wherever applicable and some new results are obtained. The results indicate that the proposed model can simulate the flexural waveforms realistically for 'very thin' to 'moderately thick' plates. It is also found that the present model is as accurate as 3D FEM but it possesses much better computational efficiency.
- Subjects
COMPOSITE plates; FINITE element method; ACOUSTIC emission; SOUND waves; SHEARING force
- Publication
Canadian Journal of Civil Engineering, 2021, Vol 48, Issue 12, p1639
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/cjce-2020-0452