Being able to handle wave propagation is essential to the understanding of nondestructive evaluation techniques, which enable location and measurement of defects in structures, evaluation of constitutive material constants, and identification of the state of stress. This short course covers selected problems of wave propagation in structures, that is, waves in strings, bulk waves in 3D solids, guided waves, acoustoelasticity, and their application to the solution of materials characterization and image reconstruction problems.
21-22-23 luglio 2021, ore 15:00-17:00
- Dispersion principles explained by means of waves in strings; waves in unbounded isotropic and anisotropic media. Reflection and transmission of waves from interfaces. Guided waves in plates.
- Spectral elements and semi-analytical methods for the calculus of dispersion curves in waveguides. Wave propagation in a prestressed medium: the theory of acoustoelasticity; nonlinear effects.
- Materials characterization and characterization of the stress state. Image reconstruction of defects and inclusions with arrays of transducers and computed tomography.