An experimental set-up for the ultrasonic consolidation of commingled thermoplastic rovings has been developed. It integrates a laboratory filament winding machine with the sonotrode of an ultrasonic welding head. A commingled roving made of polypropylene and glass fibers was used to fabricate several prototypes of cylinders of different thicknesses. The physical, mechanical and morphological properties of consolidated composite specimens were measured and related to the different processing conditions. The heat transfer phenomena which occur during consolidation of these rovings were simulated solving, by finite element analysis, the energy balance accounting for the heat generated by ultrasound and the melting characteristics of the thermoplastic matrix
Ultrasonic consolidation of commingled thermoplastic composites rovings
LIONETTO, Francesca;MONTAGNA, FRANCESCO;DELL'ANNA, RICCARDO;MAFFEZZOLI, Alfonso
2014-01-01
Abstract
An experimental set-up for the ultrasonic consolidation of commingled thermoplastic rovings has been developed. It integrates a laboratory filament winding machine with the sonotrode of an ultrasonic welding head. A commingled roving made of polypropylene and glass fibers was used to fabricate several prototypes of cylinders of different thicknesses. The physical, mechanical and morphological properties of consolidated composite specimens were measured and related to the different processing conditions. The heat transfer phenomena which occur during consolidation of these rovings were simulated solving, by finite element analysis, the energy balance accounting for the heat generated by ultrasound and the melting characteristics of the thermoplastic matrixI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
