INVESTIGADORES
STOCCHI Ariel Leonardo
congresos y reuniones científicas
Título:
Effect of the consolidation degree on the fracture and failure behaviour of self-reinforced polypropylene composites as assessed by acoustic emission
Autor/es:
IZER ANDRAS; ARIEL STOCCHI; BÁRÁNY TAMÁS; VALERIA PETTARIN; CELINA BERNAL; TIBOR CZIGANY
Lugar:
Budapest
Reunión:
Conferencia; 14TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS; 2010
Resumen:
In this work, the failure behaviour of self-reinforced polypropylene
composites (SRPPC) was studied. As reinforcement a fabric, woven from highly
stretched split PP yarns, was used whereas as matrix materials α and β crystal
forms of isotactic PP homopolymer and random PP copolymer (with ethylene) were
selected. Composite sheets were produced by a film-stacking method and
compression moulded for constant holding time and at constant pressure but at
different processing temperatures to obtain SRPPC sheets with different
consolidation degree. The failure behaviour of tensile specimens was assessed
by the acoustic emission (AE) technique and the typical failure behaviour was
deduced for the different consolidated composites. Both the number of AE events
and the shape of the cumulative AE events versus deformation curve depend on
the adhesion between phases. Correlations between the dominant failure
mechanisms and AE events amplitude for model specimens were established. They
can be used to monitor the damage growth process in SRPPCs.