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Advisor(s)
Abstract(s)
This paper proposes a real time damage identification method based on the perturbation analysis of the rotation field, which are measured using shearography technique. A particular case of phase modulation method is applied to the interference pattern in order to improve the spatial resolution of the rotation field. A program was developed in Matlab® platform for digital recording the information capture by CCD camera and post-processing the data using dedicated image techniques. The phase filter and unwrapping algorithms were optimized to allow the visualization at video rate the full-field rotations fields. For small internal damages in laminated composite plates, the results show a superior performance of the proposed technique in relation to the classical raw fringe analysis.
Description
Keywords
Multi-damage localisation laminated plate Rotation field Speckle shearography
Citation
Lopes, H.; Ribeiro, J.E.; Santos, J.; Vaz, M.A.P.; Gomes, J.S. (2013). Damage identification using real time rotating field analysis. In 4th International Conference on Integrity, Reliability and Failure – IRF2013. Funchal - Madeira