The nonlinear response of piezoelectric devices consisting of PVDF layers is analyzed by means of a novel hybrid multiscale approach. At the system scale, a fractional-order current–voltage relationship for the electrical capacitance in the circuit and a fractional power law of the nonlinear stiffness are assumed, thereby obtaining an electromechanical dynamic system defined by a set of fractional differential equations. The stiffness is represented by a spring-type element, whose constitutive model arises from a nonlinear microscale analysis carried out at increasing levels of static forces. At this scale, a distributed model is employed and the FE^2 method is used to obtain the load-deflection curve.
Nonlinear multiscale dynamics of flexible piezoelectric structures: the role of micromechanics and electrical variables / Maruccio, Claudio; Quaranta, Giuseppe; Lacarbonara, Walter. - (2019), pp. 681-682. (Intervento presentato al convegno First International Nonlinear Dynamics Conference tenutosi a Rome).
Nonlinear multiscale dynamics of flexible piezoelectric structures: the role of micromechanics and electrical variables
Giuseppe Quaranta
;Walter Lacarbonara
2019
Abstract
The nonlinear response of piezoelectric devices consisting of PVDF layers is analyzed by means of a novel hybrid multiscale approach. At the system scale, a fractional-order current–voltage relationship for the electrical capacitance in the circuit and a fractional power law of the nonlinear stiffness are assumed, thereby obtaining an electromechanical dynamic system defined by a set of fractional differential equations. The stiffness is represented by a spring-type element, whose constitutive model arises from a nonlinear microscale analysis carried out at increasing levels of static forces. At this scale, a distributed model is employed and the FE^2 method is used to obtain the load-deflection curve.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
