The use of automated projection interferometry in monitoring aerofoil buckling

Autor:	Carol Ann Featherston, W. D. Lester
Rok vydání:	2002
Předmět:	Airfoil Exposure business.industry Computer science Mechanical Engineering Aerospace Engineering Grating Processing Interferometry Optics Buckling Mechanics of Materials Solid mechanics Projection method business computer computer.programming_language
Zdroj:	Experimental Mechanics. 42:253-260
ISSN:	1741-2765 0014-4851
Popis:	Projection moire is frequently used to examine the out-of-plane displacement of thin-walled shells during buckling. One way of implementing this technique is to use double exposure photography to superimpose the initial and deformed images of a grating projected onto the surface of the specimen. This generates a pattern of fringes representative of points of equal displacement, thus presenting a snapshot of the full-field buckling behavior. This paper outlines a technique to extend this method to provide a computer generated real-time fringe pattern throughout the whole buckling and post-buckling process. This is achieved by using a CCD camera and specially developed processing software to continuously superimpose the initial image of the grating (i.e., the first frame of the captured video) onto subsequent frames in which this grating is deformed due to the displacement. This method produces series of fringes in digital format, which are ideal for further processing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1f737989fd1b63b8938e8ceac1cb60e8 https://doi.org/10.1007/bf02410980 Zobrazit plný text záznamu Full text from SpringerLink