Browsing by Author "Mutlu, Mert"
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Item APPLICATION OF THE CONTOUR METHOD IN COLD ROLLED ALUMINUM PLATES(2022-02-16) Mutlu, Mert; Şimşir, CanerThe recently popular contour method can measure residual stresses through cross section of any part. The contour method can give 2D stress map without any inverse calculation as other techniques do. It is cheap, simple and has many applications. Moreover, measurement depth is not limited by contrast with other techniques such as hole drilling and neutron diffraction. This study presents an application of the contour method on a cold rolled aluminum plate. In this thesis, two AA 5083 specimens were used to determine the residual stresses by the contour method. The specimens were cut in two by using wire-Electric Discharge Machining (w-EDM) and then, the contours from the cut surfaces were measured by an optical surface profiler using the focus variation technique. The obtained data were processed by MATLAB software. After data processing, inverse of the measured contours were applied to a FE model and a 2D map of the residual stress was attained. The stress distribution profiles were compared to the results obtained from Slitting and Ring Core methods for verification and a good agreement with Slitting Method was achieved. Also, the stress distribution profile from the Contour Method was according to the expected stress distribution after a cold rolling process. Although there were some differences with Ring Core Method, similar trends were observed.