title: Extraction of plate bending stiffness from coincidence angles of sound transmission measurements.
abstract: The bending stiffness in a homogeneous, isotropic, thin plate is experimentally derived from measurements of coincidence angles extracted from supercritical sound transmission versus frequency measurements. A computer controlled turn table rotates a plate sample and a receiver array, placed in the near field of the plate. The array is used to track the transmitted sound through the plate, generated by a far-field stationary source, using beam forming. The array technique enables measurement of plates measuring only one wavelength in width. Two examples are used for proof of concept, including an aluminum plate in air and an alumina plate under water.
authors.affiliation: Geophysics Group (EES-17), Los Alamos National Laboratory, Los Alamos, New Mexico 87545.
authors.forename: Brian E
authors.initials: BE
authors.lastname: Anderson
authors.affiliation: Graduate Program in Acoustics, The Pennsylvania State University, 201 Applied Science Building, University Park, Pennsylvania 16802.
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Shaw
authors.affiliation: Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N283 Eyring Science Center, Provo, Utah 84602.
authors.forename: Blaine M
authors.initials: BM
authors.lastname: Harker