Elastic Properties Characterization by Means of Dynamic Resonant Technique

The determination of elastic properties by means of a nonde-

structive resonant vibrating method has been developed for bulk

and coated materials characterization. The study of bulk materials

is investigated in relationship with physical properties. Analytical

models of composites vibrations allow us to determine accurately

the modulus of both the coating and the substrate and applied

to single-coated materials; this formalism is then extended to the

study of multicoated materials. For materials presenting gradients

of mechanical properties, a simplified n-layer model allows to estimate the modulus gradient. Recent developments concern the

determination of the shear modulus and the evaluation of residual

stresses for bulk and coated materials.