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Damage localisation in beams using the ritz method and speckle shear interferom...

Santos, J.V. Araújo dos; Lopes, H.; Ribeiro, J.E.; Maia, N.M.M.; Vaz, M.A.P.

A novel numerical-experimental technique is developed in order to minimise some of the difficulties exhibited by others damage localisation approaches. The present technique relies on the computation of undamaged rotation fields using the Ritz method and the Timoshenko beam theory, while the measurement of damaged rotation fields is performed by speckle shear interferometry.

Data: 2010   |   Origem: Biblioteca Digital do IPB

Damage localisation in beams using the ritz method and speckle shear interferom...

Santos, J.V. Araújo dos; Lopes, H.; Ribeiro, J.E.; Maia, N.M.M.; Vaz, M.A.P.

A novel numerical-experimental technique is developed in order to minimise some of the difficulties exhibited by others damage localisation approaches. The present technique relies on the computation of undamaged rotation fields using the Ritz method and the Timoshenko beam theory, while the measurement of damaged rotation fields is performed by speckle shear interferometry. Two damage localisation indicators a...

Data: 2010   |   Origem: Biblioteca Digital do IPB

A hybrid technique for damage detection on laminated plates

Lopes, H.; Santos, J.V. Araújo dos; Guedes, R.M.; Vaz, M.A.P.

This work presents an experimental/numerical technique for delamination damage detection on thin laminated composite plates. The delamination is identified using a technique based on the curvature differences of the plate modes shapes measured before and after impact damage. The natural frequencies are extracted from Frequency Response Functions. A double pulse TV holography is used for no-contact and accurate ...

Data: 2006   |   Origem: Biblioteca Digital do IPB

Damage localization in laminated composite plates using double pulse-electronic...

Santos, J.V. Araújo dos; Lopes, H.; Vaz, M.A.P.; Soares, C.M. Mota; Soares, C.A. Mota; Freitas, M.J.M. de

One method for the damage localization of impact damage in laminated composite plates, based on their vibrational characteristics, is presented in this paper. This method uses double pulse-electronic holographic interferometry for mode shapes acquisition and the differences in curvatures. The rotations and curvatures are numerically obtained. The method is applied to a carbon fibre reinforced epoxy rectangular ...

Data: 2006   |   Origem: Biblioteca Digital do IPB

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