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Interface debond crack growth in tension-tension cyclic loading of single fiber polymer composites
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
Technical University of Denmark, Risø Campus.
Technical University of Denmark, Risø Campus.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-9649-8621
2013 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 44, nr 1, s. 86-94Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Fiber/matrix interface debond crack growth from a fiber break is defined as one of the key mechanisms of fatigue damage in unidirectional composites. Considering debond as an interface crack its growth in cyclic loading is analyzed utilizing a power law, where the debond growth rate is a power function of the change of the strain energy release rate in the cycle. To obtain values of two parameters in the power law cyclic loading of fragmented single fiber specimen is suggested. Measurements of the debond length increase with the number of load cycles in tension-tension fatigue are performed for glass fiber/epoxy single fiber composites. Analytical method in the steady-state growth region and FEM for short debonds are combined for calculating the strain energy release rate of the growing debond crack. Interface failure parameters in fatigue are determined by fitting the modeling and experimental results. The determined parameters for interface fatigue are validated at different stress levels.

sted, utgiver, år, opplag, sider
2013. Vol. 44, nr 1, s. 86-94
HSV kategori
Forskningsprogram
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-5796DOI: 10.1016/j.compositesa.2012.08.019ISI: 000311471600012Scopus ID: 2-s2.0-84866999746Lokal ID: 3fb7885c-b3be-402e-855d-cdf51dec3683OAI: oai:DiVA.org:ltu-5796DiVA, id: diva2:978671
Merknad
Validerad; 2013; 20120914 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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