Proceedings ArticleDOI
Photoelastic analysis of stress frozen slices using five-step method
T. Kasimayan,K. Ramesh +1 more
- Vol. 7522, pp 752209
TLDR
In this paper, stress frozen 3D models are sliced mechanically and the whole field principal stress differences (Isochromatics) and principal stress directions (Isoclinics) are evaluated by capturing only five images using the standard optical arrangements of a conventional polariscope.Abstract:
Digital photoelasticity is a whole field experimental technique which can analyze both 2-D and 3-D models. In this paper, stress frozen 3-D models are sliced mechanically and the whole field principal stress differences (Isochromatics) and principal stress directions (Isoclinics) are evaluated by capturing only five images using the standard optical arrangements of a conventional polariscope. The wrapped isoclinic values obtained by processing the first four colour polarization stepped images in the range -π/4 to +π/4 are unwrapped using adaptive quality guided phase unwrapping algorithm to get isoclinics in the range of -π/2 to +π/2. The total fringe order is evaluated by three fringe photoelasticity or RGB photoelasticity with its latest developments like colour adaptation combined with refined three fringe photoelasticity. The methodology is validated for two slices cut from aero-structural components.read more
Citations
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Journal ArticleDOI
Digital photoelasticity – A comprehensive review
TL;DR: This review thematically classifies all the developments in digital photoelasticity and highlights the relative merits and drawbacks of the various techniques to allow an end-user to make an informed choice on the type of technique to be used in a particular situation.
References
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Journal ArticleDOI
Adaptive Smoothing for Isoclinic Parameter Evaluation in Digital Photoelasticity
T. Kasimayan,K. Ramesh +1 more
TL;DR: In this article, a new adaptive smoothing algorithm is proposed to remove the noise due to isochromatic-isoclinic interaction that automatically takes care of the isotropic points and π jumps present in the ISO phasemap.
Book ChapterDOI
Digital Photoelastic Evaluation of Isochromatic Fringe Order in a 3D Model of Complex Rocket Motor Strap- on Joint
TL;DR: For effective phase unwrapping, the isochromatic phasemap should be corrected for ambiguity, and a combination of these algorithms for removing the ambiguity in the whole domain of the model.
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