In this paper a theoretical base required for the development of a reliable structural health monitoring system based on ultrasonic guided waves is considered. An exact theory is used for relatively rapid calculation of the PZT driven surface motion in a plate recorded in an ultrasonic experiment. The theoretical results are compared with those obtained from an explicit finite element code for their mutual verification, showing excellent agreement. Important characteristics of the ultrasonic signals recorded by the PZT patches in an experiment are carefully extracted and modeled to identify the behavior of the PZT patches used in the experiment. Some applications are presented mainly concerning composite plates subjected to low velocity impact damage or more general hidden defects. Finally an application to the beam forming technique is presented.
Damage detection techniques in composite structures using ultrasonic guided waves / Ricci, Fabrizio; Monaco, Ernesto; Tancredi, Simone; S., Banerje; A. K., Mal. - (2011), pp. 1923-1931. (Intervento presentato al convegno 8th International Workshop on Structural Health Monitoring 2011 tenutosi a Stanford University, Palo Alto CA, USA nel Sept 13-15 2011).
Damage detection techniques in composite structures using ultrasonic guided waves
RICCI, FABRIZIO;MONACO, ERNESTO;TANCREDI, SIMONE;
2011
Abstract
In this paper a theoretical base required for the development of a reliable structural health monitoring system based on ultrasonic guided waves is considered. An exact theory is used for relatively rapid calculation of the PZT driven surface motion in a plate recorded in an ultrasonic experiment. The theoretical results are compared with those obtained from an explicit finite element code for their mutual verification, showing excellent agreement. Important characteristics of the ultrasonic signals recorded by the PZT patches in an experiment are carefully extracted and modeled to identify the behavior of the PZT patches used in the experiment. Some applications are presented mainly concerning composite plates subjected to low velocity impact damage or more general hidden defects. Finally an application to the beam forming technique is presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
