title: Second derivative of displacement on cylindrical shells by projection moire.
abstract: We describe a new method, based on projection moire, in which fringes relate directly to the second derivative of displacement. The method was applied to a cylindrical shell segment. The experimental results obtained with the new method were found to be in good agreement with strain gauge measurements.
authors.forename: J
authors.initials: J
authors.lastname: Politch
authors.forename: S
authors.initials: S
authors.lastname: Gryc