Photoelastic analysis of stress frozen slices using five-step method

T. Kasimayan; K. Ramesh

doi:10.1117/12.851707

14 April 2010 Photoelastic analysis of stress frozen slices using five-step method

T. Kasimayan, K. Ramesh

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752209 (2010) https://doi.org/10.1117/12.851707
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

T. Kasimayan and K. Ramesh "Photoelastic analysis of stress frozen slices using five-step method", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752209 (14 April 2010); https://doi.org/10.1117/12.851707

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