Abstract
The strain in thin flexible membranes representing human skin has been studied using moiré interferometry. A method of using a flexible coating of photographic emulsion was developed. The equations for use in differential interferometry were also derived for very large deformations. The method was applied to two types of cases: rectangular membranes subjected to a uniform axial strain, and membranes containing strain concentrators that represent bandages placed on the surface of the skin. Results for the former case were within 3% of exact results, while results near the concentrator indicate strain concentration factors ranging from −1.25 to 1.75.
© 1979 Optical Society of America
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