New method for determining strain on the surface of a body with photoelastic coatings
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An experimental method has been developed for determining the strains at all points on the surface of a structure. Narrow epoxy-resin strips on a thin film are cemented to the surface of the body under study. Photoelastic studies show that the birefringent pattern of these strips is dependent only on the longitudinal strain parallel to their axes. When the strips are used in conjunction with a continuous photoelastic coating, the surface strain can be determined at all points from direct observation of the fringe patterns.
KeywordsThin Film Mechanical Engineer Fluid Dynamics Experimental Method Direct Observation
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- 1.Drucker, D. C., “Photoelastic Separation of Principal Stresses by Oblique Incidence,”Inl. Appl. Mech., Trans. ASME,64,A161–164 (1942).Google Scholar
- 2.Drucker, D.C., “The Method of Oblique Incidence in Photoelasticity”,Proc. SESA,VIII (1) (1950).Google Scholar
- 3.Timoshenko, S., Phil. Mag.,44,1014 (1922).Google Scholar