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Fatigue damage mechanisms in unidirectional carbon-fibre-reinforced plastics
Luleå tekniska universitet.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik.ORCID-id: 0000-0003-1871-4020
1999 (Engelska)Ingår i: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 34, nr 11, s. 2535-2546Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The fatigue life behaviour and the underlying micromechanisms have been studied in two different Types of unidirectional carbon-fibre-reinforced plastics loaded in tension-tension along the fibre direction. The carbon fibres (AS4) were the same in the two composite systems. One thermoplastic matrix (polyetheretherketone, PEEK) and one thermosetting matrix (epoxy toughened with a thermoplastic additive) were used. The macroscopic fatigue behaviour was characterised by fatigue life diagrams. Surface replicas were taken intermittently during the course of the fatigue tests to monitor the active fatigue damage micromechanisms. The thermoset based composite showed a higher fatigue resistance with few microcracks initiated at distributed fibre breaks growing at a decelerating rate. The thermoplastic composite had a more pronounced fatigue degradation with a steeper fatigue life curve, which was caused by widespread propagating debonds and matrix cracks. The use of a tougher and more ductile matrix results in an inferior fatigue life performance, due to a more widely distributed accumulation of damage that propagates at a higher rate.

Ort, förlag, år, upplaga, sidor
1999. Vol. 34, nr 11, s. 2535-2546
Nationell ämneskategori
Kompositmaterial och -teknik
Forskningsämne
Polymera konstruktionsmaterial
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URN: urn:nbn:se:ltu:diva-14136DOI: 10.1023/A:1004684228765ISI: 000081181800007Scopus ID: 2-s2.0-0032676417Lokalt ID: d789e1a0-8ba3-11dc-a33e-000ea68e967bOAI: oai:DiVA.org:ltu-14136DiVA, id: diva2:987090
Anmärkning
Godkänd; 1999; 20071105 (cira)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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