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Displacement full-fiel measurement at crack root using the interferometric Moiré technique

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Resumo:This paper presents the measurement of displacement field at the crack root of test specimens using the interferometric Moiré technique. The assessment of the displacement field is obtained from the standard test method for plain-strain, ASTM E399-90. The Moiré grating is replicated on specimen surface and the double LASER illumination allows the non-contact full-field measurement of the displacement field with high resolution down to a tenth of the wave length. The time phase modulation technique is used for increasing the spatial resolution of this method. The global displacement field is obtained by dedicated image processing technique. Finally, a comparison of the experimental results and the numerical calculations is presented.
Autores principais:Ribeiro, J.E.
Outros Autores:Lopes, Hernani; Monteiro, Jaime M.; Vaz, M.A.P.
Assunto:Moiré interformetry Fracture mechanics Full-field measurement Image processing techniques
Ano:2009
País:Portugal
Tipo de documento:documento de conferência
Tipo de acesso:acesso aberto
Instituição associada:Instituto Politécnico de Bragança
Idioma:inglês
Origem:Biblioteca Digital do IPB

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