UMA ABORDAGEM VIA CNC PARA GERAÇÃO DE PADRÕES DE PONTOS PARA ANÁLISES POR CDI

• Autor(a) principal: ., Matheus Barbosa A Moser
• Data de Publicação: 2016
• Outros Autores: Anflor, Carla Tatiana Mota
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Interdisciplinar de Pesquisa em Engenharia
• Texto Completo: https://periodicos.unb.br/index.php/ripe/article/view/20729
• topic: Digital image correlation. Speckle patterns. Computadorized numerical control marking.; Correlação digital de imagens. Padrões de pontos. Marcação por comando numérico computadorizado.

Digital image correlation (DIC) is an optical metrology technique used to acquire deformational and displacement data of mechanically loaded surfaces based on digital images taken before and after the loading. To achieve this, this technique requires the studied surface to have a randomly distributed speckle pattern marked over it. This speckle pattern provides a reference for the image correlation procedure, allowing the DIC system to obtain the surface deformation based on the speckle pattern deformation. In this sense, as already stated in many recent studies, the quality of the used speckle pattern has direct influence on the quality of the DIC results. Although many numerical studies have already defined near optimum parameters for a speckle pattern, the lack of proper techniques to reproduce it on surfaces renders it impractical. In sight of this, this work presents a numerical methodology for the generation of speckle patterns and the development of a computadorized numerical control marking equipment capable of accurately reproducing it on real surfaces.