Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/21755
Título: | Characterization of coating processes in Moiré Diffraction Gratings for strain measurements |
Autor(es): | Ribeiro, João Eduardo Lopes, Hernani Carmo, J. P. |
Palavras-chave: | Optical techniques Moiré interferometry Moiré Diffraction Gratings (MDGs) Replication Moiré Diffraction Gratings (MDGs) replication |
Data: | 2013 |
Editora: | Elsevier 1 |
Revista: | Journal of Optics & Laser Technology |
Resumo(s): | This paper analyses the influence of the coating process in the optical efficiency of replicated Moire´ Diffraction Gratings (MDGs), which are applied on real field applications for measuring both the surface displacements and strains. The Moire´ diffraction technique is an experimental full-field, non-contact and high resolution optical method, which can reveal to be very useful in extreme harsh environments. The optical efficiency of the replicated MDGs plays an important role in the quality of the experimental measurements. Two processes were used to obtain the metallic coatings: sputtering and aluminum vaporization. A good coatings quality with high optical efficiency was achieved for both processes (e.g., 17%–28%). However, for the replicated gratings a slight decrease in the optical efficiency was found (e.g., 14%–21%). The MDGs were successfully used for the experimental measurements of displacement and strains in a single lap joint. The measurements also showed that high quality of measurements allowed the identification of unbounded regions. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/21755 |
DOI: | 10.1016/j.optlastec.2012.09.005 |
ISSN: | 0030-3992 |
Versão da editora: | http://www.sciencedirect.com/science/article/pii/S0030399212003982 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CAlg - Artigos em revistas internacionais / Papers in international journals DEI - Artigos em revistas internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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7e5f05e4c512c6b48b128687dfd9347d.pdf Acesso restrito! | JOLT JERibeiro + HLopes + JPCarmo | 1,29 MB | Adobe PDF | Ver/Abrir |