title: Moiré interferometry strain measurements in elastic thin membranes.
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.
authors.forename: R D
authors.initials: RD
authors.lastname: Flack
authors.forename: J G
authors.initials: JG
authors.lastname: Thacker
authors.forename: J G
authors.initials: JG
authors.lastname: Dixon