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Dokument Nr.	200300899 (klicken Sie bitte auf die Dokumentnummer um dieses Dokument anzuzeigen)
Titel	Thermal de-consolidation of thermoplastic matrix composites - I. Growth of voids
Abstract	Thermoplastic matrix composites have one unique advantage, being reprocessable or recycleable through post-thermoforming and fusion bonding subject to a re-heating/cooling cycle. However, this advantage is not unconditionally available, and thermoplastic matrix composites may suffer greatly from unexpected deterioration in meso-structures during the thermal processing, leading to de-consolidation. Based on experimental observations, the mechanisms of thermal de-consolidation are discussed in detail, and a void growth model is established to evaluate the degree of de-consolidation in a post-thermal operation. Using this model the dependence of void growth on material properties and processing parameters, such as the compressibility of fibre reinforcement, the effects of elasticity/viscosity of matrix, the applied external pressure and processing temperature is evaluated. It is shown that the results obtained are in a good agreement with the experimental data. (orig.)
Control terms engl.	FLEXURAL STRENGTH; PROPERTIES, THERMOMECHANICAL; ELASTICITY; GLASS FIBER-REINFORCED PLASTICS; GLASS TRANSITION TEMPERATURE; CARBON FIBER-REINFORCED PLASTICS; COMPRESSIBILITY; MICROSTRUCTURE; MODELS; POLYAMIDES; POLYETHERIMIDES; POLYPHENYLENE SULFIDE; POROSITY; CALCULATIONS; RECYCLING; WELDING; VISCOSITY; HEAT; HEAT TREATMENT
Control terms german	BIEGEFESTIGKEIT; EIGENSCHAFTEN, THERMOMECHANISCHE; ELASTIZITAET; GLASFASERVERSTAERKTE KUNSTSTOFFE; GLASTEMPERATUR; KOHLEFASERVERSTAERKTE KUNSTSTOFFE; KOMPRESSIBILITAET; MIKROSTRUKTUR; MODELLE; POLYAMIDE; POLYETHERIMIDE; POLYPHENYLENSULFID; POROSITAET; RECHENVERFAHREN; RECYCLING; SCHWEISSEN; VISKOSITAET; WAERME; WAERMEBEHANDLUNG