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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2005.tde-10112023-102943
Document
Author
Full name
Gilvan Barbosa Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2005
Supervisor
Committee
Gonçalves, Edison (President)
Goncalves Junior, Armando Albertazzi
Horikawa, Oswaldo
Title in Portuguese
Análise de tensões através do processamento de imagens holográficas.
Keywords in Portuguese
Holografia
Materiais (Propriedades mecânicas)
Processamento de imagens
Abstract in Portuguese
A associação da metrologia óptica, interferometria, holografia e processamento de imagens representa uma contribuição importante para o desenvolvimento do estudo do comportamento mecânico dos materiais, permitindo a avaliação mais precisa e rápida da possibilidade de falha de estruturas e componentes mecânicos. As vantagens do método proposto sobre os ensaios convencionais são: as medições são realizadas em condições reais de solicitação; a precisão para medir pequenas tensões e deformações; o método é completamente não-destrutivo e não-evasivo, ou seja, que não compromete a integridade física do componente ensaiado. São abordados os métodos de obtenção do estado de tensões de um corpo de provas, gravação e reprodução de um holograma, medição de deslocamentos por interferometria e análise das imagens por computador. Finalmente, apresentam-se os resultados de um ensaio experimental de flexão pelo método proposto, a análise dos resultados, conclusões obtidas e recomendações.
Title in English
Untitled in english
Keywords in English
Holography
Image processing
Materials (Mechanical properties)
Abstract in English
The association of optical metrology, interferometry, holography and image processing represents a important contribution for the development of the study of the mechanical behavior of materials, providing the evaluation more precise and faster of fault possibility of structures and mechanical components. The advantages of the proposed method upon conventional tests are: the measurements are performed under real solicitation conditions; the precision on measuring little tensions and deformations; the method is completely non-destructive, and non-invasive, that is, it does not compromise the physical integrity of the tested component. The methods of obtaining the state of tensions of a specimen, hologram recording and reconstructing, displacement measurement through interferometry, and computer image analysis are approached. Finally, the results of a flexion experimental test by the proposed method, the analysis of the results, obtained conclusions and recommendations are presented.
 
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Publishing Date
2023-11-10
 
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