Smoothing of isochromatic data of stereolithography built spline shaft

K. Ashokan, K. Ramesh

Abstract

Digital Photoelasticity is an experimental method for determining stresses in 2D and 3D models. Recently Stereolithography, one of the Rapid Prototyping (RP) techniques, is being used widely to produce 3D photoelastic models of complicated shapes directly from Computer Aided Design (CAD) models. But with such models, the fringe data obtained is not continuous as in the case of conventional models. This is due to the porous nature of the stereolithography models attributed to the way in which the models are built. To address this issue, the use of various smoothing techniques is explored in this paper for better data estimation. The performance of different 2D smoothing techniques viz. averaging filter, median filter and Wiener filter on the quality of the fringe order data obtained for a slice cut from the stress frozen model of stereolithography built spline shaft is compared.

Keywords

Digital photoelasticity; rapid prototyping; stereolithography; smoothing

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IMEKO-TC14-2007-36.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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