Full-field measurements with Digital Image Correlation for vibro-impact characterisation

Vibro-impact (VI) based control strategies exploit non-linear phenomena occurring during impacts between oscillating masses and vibrating structures to mitigate vibrations. They are known be effective on a wide frequency range, in harsh environnement, they eco-friendly comparison some visco-elastic polymers used for the same application. Different assumptions emerge explain energy dissipation such as material contact effects, or dynamic transfers structure acting absorbers. As classical vibratory measurement tools do not allow accurately easily measure what happens area motion of absorber, it is difficult validate quantify phenomenon. The purpose study take advantage full field measurements vibro-impact phenomenon characterise absorber better understand interactions impact. To reach this objective, dedicated experimental set-up has been designed method involving Digital Image Correlation (DIC) high-speed camera capture reconstruct mass. characterisation allows estimate Coefficient Of Restitution (COR) friction forces, provides data that two different modelling COR Hertz theory. quantities identified paper enable physical at stakes VI absorber.