Abstract
Experimental optics provides an interesting alternative to finite-element analysis (FEA) for estimating stress distribution in bodies subjected to load. Complete determination of the state of stress in a two-dimensional transparent model of the body was performed, using modern interferometry in combination with conventional photoelasticity. Stress concentrations and singularities may be evaluated in the same experimental set-up by means of the methods of caustics. The present approach eliminates the effect of limited optical quality of the model material, which is an advantage in engineering applications of the methods proposed. In contrast to most testing procedures using interferometry, this technique provides particularly simple handling of equipment and ease in evaluation. The paper describes an application to restorative dentistry of these methods of experimental stress analysis.
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