A theory is presented for the dispersion relations of the nonlinear phonon-polaritons arising when phonons are coupled to the electromagnetic waves in multilayered structures of nonlinear materials. The calculations are applied to a multilayered structure consisting of a thin film surrounded by semi-infinite bounding media where each layer may have a frequency dependent dielectric function and ...

Composite laminates have complex failure modes. In order to investigate the evolution of in composite laminates, this paper performed an experimental study on four with different layups using acoustic emission (AE) technique. Two kinds defects are imposed including a hole and crack center. Tensile bending tests defective real-time AE signals collected. By analyzing spectrograms obtained integra...

This paper studies the nonlinear vibration analysis of a simply supported Euler-Bernoulli beam resting on a nonlinear elastic foundation under compressive axial load using nonlinear normal modes concept in the case of three-to-one (3:1) internal resonance. The beam’s governing nonlinear PDE of motion and also its boundary conditions are derived and then solved using the method of Multiple Time ...