Experimental application using shadow moiré technique in tensile test
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
Non-destructive testing can determine the occurrence of failures individually
material and among them are the optical methods that use optical interferometry
and produce fringes to determine strain and stress rates of an object. The moiré
techniques are based on the moiré phenomenology and characterized to be an
effect resulting from the geometrical interference between two or more
overlapping grids, generating patterns of lucid and dark lines which are denoted
by moiré fringe patterns. The shadow moiré technique consists in designing a grid
ahead of the object that serves as a reference grid. The shadow of the projected
grid on the object generates a second grid, in this case works as a grid object and
interacting with the reference grid to the formation of fringes. The experiment
was consisted of submitting a standardized test piece to a strain test in universal
testing machine and verify, through the shadow moiré technique, the behavior of
the specimen surface. The different coloring in the treatment of the images,
because it is a tensile test, can be associated with the distribution of stress and
deformation along the specimen. Indeed, where there is greater concentration of
tension is where the breakdown occurs, therefore it is suggested that the shadow
moiré techniques in tensile test showed the region of greatest tension and subject
to breakdown. The studies of plots showed the existence of relationship between
the number of fringes and the information about the material. To explore this
result would be necessary to capture the image at the time of a test and check the
displacement of the fringes and, consequently, the distribution of stress and
strain field. The continuity of this work may add innovations in the analysis of
stresses and strains materials, thus contributing to other areas to take ownership
of this methodology and use these methods to the development of knowledge and
science.
Como referenciar
FUJITA, ISAC K.; FABBRO, INACIO M. dall; GAZZOLA, JONATHAN; SILVA, GABRIELA K. e; SANTOS, GIVANILDO A. dos; NAKAMOTO, FRANCISCO Y.; COUTO, ANTONIO A. Experimental application using shadow moiré technique in tensile test. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... São Carlos, SP: Aptor Software, 2016. p. 1041-1041. Disponível em: http://repositorio.ipen.br/handle/123456789/28060. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.