Fringe multiplication and thickness effects in birefringent coating
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The feasibility of applying fringe-multiplication technique in birefringent-coating analysis is studied, and the conditions under which this technique can be used are discussed. The fringe-multiplication technique is then applied to birefringent-coating analysis of a plate with a central circular hole under uniaxial tension. The experimental results are then compared with Howland's analytical results for the shear-stress distribution along the minimum cross section and for normal stress distribution along the edge of the plate. Duffy's correction factors for curvatures and strain gradients are used to estimate the correction in the latter experimental results.
KeywordsMechanical Engineer Fluid Dynamics Normal Stress Stress Distribution Correction Factor
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- 1.Zandman, F., Redner, S. S., andRiegner, E. I., “Reinforcing Effect of Birefringent Coatings,”Experimental Mechanics,2,No. 2,55–64, (February 1962).Google Scholar
- 2.Zandman, F., andPost, D., “Accuracy of the Birefringent-coating Method for Coatings of Arbitrary Thickness,”Ibid., 1, No. 1, 21–32 (January 1961).Google Scholar
- 3.Duffy, J., “Effects of the Thickness of Birefringent Coatings,” Brown University Report prepared under Government Contract DA-19-020-ORD-798 (April 1958). Also,Experimental Mechanics 1, No. 3, 74–82.Google Scholar
- 4.Lee, T. C., Mylonas, D., and Duffy, J., “Thickness Effects in Birefringent Coating with Radial Symmetry,” Brown Univeristy Report prepared under Government Contract DA-19-020-509-ORD-4674 (April 1959). Also,Experimental Mechanics,1, No. 10, 134–142.Google Scholar
- 5.Lee, T. C. and Duffy, J., “The Measurement of Surface Strain by Means of Bonded Birefringent Strips,” Brown University Report prepared under Government Contract DA-19-020-509-ORD-4674 (June 1959). Also,Experimental Mechanics,1, No. 9, 109–112.Google Scholar
- 6.Post, D., “Isochromatic Fringe Sharpening and Fringe Multiplication in Photoelasticity,”Proc. SESA, 12, No. 2, 143–156 (1955).Google Scholar
- 7.Wells, A. A. and Post, D., “The Dynamic Stress Distribution Surrounding a Running Crack—A Photoelastic Analysis,” Ibid. Proc. SESA,15, No. 1, 69–92.Google Scholar
- 8.Houwland, R. C. J., “On the Stresses in the Neighborhood of a Circular Hole in a Strip under Tension,”Trans. Roy. Soc. (London), A229, 49–86 (1929-1930).Google Scholar