 NDTnetWCNDT '96 - New Delhi Table of Contents |  |
  | UT - Laser - Full Paper Not Received |  |
| NDTnet WCNDT '96 - New Delhi Table of Contents | |
| | UT - Laser - Full Paper Not Received | |
/-]n composite circular tubes is investigated theoretically and experimentally. A finite element analysis in the radial direction based on Hamilton principle is used to determine the dispersion spectra in a wide range of frequencies. The material of each lamina of the cylinder is modeled as orthotropic medium with distinct orientation. Measurements of the phase velocities of the guided waves were carried out by means of point source/point receiver (PS/PR) technique for wave propagation in off-axis directions to the symmetry of the tube. The surface displacements of guided waves induced by an Nd: YAG pulsed laser were detected by a wideband conical transducer. Comparisons between the phase velocities obtained from experimental data and those through theoretical predictions are discussed. In addition, an inversion scheme based on simplex method is developed to determine the material properties of the filament wound composite tubes. | | UT - Laser - Full Paper Not Received | |