A Study of Some Thermomechanical and Fractural Properties of Particle Reinforced Polymer Composites and SEM-Aided Microfailure Approach of Certain Fracture Parameters

Kytopoulos, VN; Sideridis, E; Bourkas, GD

dc.contributor.author	Kytopoulos, VN	en
dc.contributor.author	Sideridis, E	en
dc.contributor.author	Bourkas, GD	en
dc.date.accessioned	2014-03-01T01:18:34Z
dc.date.available	2014-03-01T01:18:34Z
dc.date.issued	2003	en
dc.identifier.issn	0731-6844	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15091
dc.subject	Glass transition temperature	en
dc.subject	Interfacial decohesion	en
dc.subject	Microfailure analysis	en
dc.subject	Particle reinforced composite	en
dc.subject	Scanning electron microscopy (SEM)	en
dc.subject	Stress intensity factor	en
dc.subject	Thermomechanical and fractural properties	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Composite materials	en
dc.subject.other	Elastic moduli	en
dc.subject.other	Epoxy resins	en
dc.subject.other	Fracture	en
dc.subject.other	Poisson ratio	en
dc.subject.other	Thermal expansion	en
dc.subject.other	Fracture stress	en
dc.subject.other	Gross modeling	en
dc.subject.other	Reinforced plastics	en
dc.title	A Study of Some Thermomechanical and Fractural Properties of Particle Reinforced Polymer Composites and SEM-Aided Microfailure Approach of Certain Fracture Parameters	en
heal.type	journalArticle	en
heal.identifier.primary	10.1177/073168403027614	en
heal.identifier.secondary	http://dx.doi.org/10.1177/073168403027614	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	In the first part of this complex study the thermomechanical and fractural properties of particle reinforced polymer composites were experimentally obtained. The experimental values for modulus of elasticity, fracture stress, fracture strain and thermal expansion coefficient were compared with those derived from theoretical formulae existing in the literature and also from a theoretical model assuming the existence of an interphase between the two main phases the filler and the matrix. This model was used to obtain theoretical expressions for modulus of elasticity and thermal expansion coefficient. The mechanical properties of the material used in this investigation were determined from tensile experiments carried out with a composite material made of epoxy resin reinforced with iron particles the volume fraction of which varies from 0 to 25% and in some cases up to 40%. To obtain information concerning the thermal expansion coefficient and glass transition temperature of the same material thermomechanical analysis (TMA) measurements were performed. The effects of heating rate and tiller content on the glass transition temperature were examined. In the second part of this study an attempt is made to explain on a more phenomenological basis the relative big discrepancies observed between theoretical models and experiments concerning certain strength parameters such as fracture stress and strain presented in the first part. This was possible by assuming a delayed kind of fracture behavior which was simulated by a subcritical crack growth based on the theory of elastic-small yielding fracture mechanics and by an arrest micromechanism. The above simulation in turn was achieved by a procedure of a semiquantitative gross estimation approach which has taken into consideration certain experimental fractographical and microstructural data such as interfacial decohesion features between grain and matrix, grain size and interinclusion spacing, parameters estimated by Scanning Electron Microscopic (SEM) measurements.	en
heal.publisher	SAGE PUBLICATIONS LTD	en
heal.journalName	Journal of Reinforced Plastics and Composites	en
dc.identifier.doi	10.1177/073168403027614	en
dc.identifier.isi	ISI:000186850600002	en
dc.identifier.volume	22	en
dc.identifier.issue	17	en
dc.identifier.spage	1547	en
dc.identifier.epage	1587	en