Nonlinear guided waves: Preface

Nonlinear Ultrasonic Guided Waves for Microstructure Characterization of Hollow Cylinders

The issue of non-destructive characterization of material microstructure with respect to precursors to macroscale damage initiation is addressed. Ultrasonic guided waves are known to be sensitive to material nonlinearity, which is evident through the generation of higher harmonic modes. Thus, nonlinear guided waves have strong potential to identify precursors to macroscale damage and revolution...

Nonlinear guided waves and symmetry breaking in left-handed waveguides

We analyze nonlinear guided waves in a planar waveguide made of a left-handed material surrounded by a Kerr-like nonlinear dielectric, and predict that such a waveguide can support fast and slow symmetric and antisymmetric nonlinear modes. We study the symmetry breaking bifurcation and asymmetric modes in such a symmetric structure. The analysis of nonlinear dispersion properties of the guided ...

Guided Waves monitoring

Lo screening di tubazioni utilizzando il metodo ad onde guidate è una realtá assodata sia in Italia che nel resto del mondo. I metodi PND tradizionali sono metodi per il controllo di punti o di aree ad estensione limitata. Inoltre il target della ispezione diventa di anno in anno più complesso a causa dell’invecchiamento delle strutture e delle carenze tecniche di alcuni metodi PND classici, ev...

On Nonlinear Water Waves in a Channel

PREFACE