This work presents a numerical simulation of the behavior of stress guided waves (GWs) propagating in a multilayer system composed of porous materials. To this end, the damped Semi-analytical Finite Element (SFE) formulation proposed in [1] is extended to take the dry porosity into account. An application of waves propagating in two squared aluminum bars jointed by a weaker layer of porous adhesive is presented. Numerical results show that variations of the adhesive's porosity modify the GWs spectro-temporal patterns. These changes could be exploited to detect the level of adhesive porosity in a total nondestructive manner for the above structures.
Numerical modeling of ultrasonic guided waves for damage detection in structures / Viola, Erasmo; Marzani, Alessandro. - ELETTRONICO. - (2010), pp. 357-360. (Intervento presentato al convegno 8th International Conference on Fracture and Damage Mechanics, FDM 2009 tenutosi a St. Julian's, Malta nel 8-10 settembre 2009) [10.4028/www.scientific.net/KEM.417-418.357].
Numerical modeling of ultrasonic guided waves for damage detection in structures
VIOLA, ERASMO;MARZANI, ALESSANDRO
2010
Abstract
This work presents a numerical simulation of the behavior of stress guided waves (GWs) propagating in a multilayer system composed of porous materials. To this end, the damped Semi-analytical Finite Element (SFE) formulation proposed in [1] is extended to take the dry porosity into account. An application of waves propagating in two squared aluminum bars jointed by a weaker layer of porous adhesive is presented. Numerical results show that variations of the adhesive's porosity modify the GWs spectro-temporal patterns. These changes could be exploited to detect the level of adhesive porosity in a total nondestructive manner for the above structures.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
