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Steady-State Debond Growth Along Broken Fibers in Unidirectional Composites During Cyclic Loading
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-9649-8621
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0003-0005-5039
2013 (Engelska)Ingår i: 9th International Conference on Composite Science and Technology: 2020 - Scientific and Technical Challenges / [ed] Michelle Meo, Lancaster: PA Destech Publications Inc. , 2013, s. 981-983Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Several regions with different governing failure mechanisms may be distinguished analyzing axial tension-tension cyclic loading of unidirectional (UD) composite. At high loads multiple fiber fracture takes place during the first loading cycle. The relative number of broken fibers depends on the maximum stress and can be estimated assuming that the fiber strength is a statistical property following Weibull distribution. Multiple fiber fracture (fragmentation) is possible because the load is transferred into the broken fiber through the interface. In cyclic loading with constant amplitude we usually assume that fibers do not experience fatigue and all fiber breaks occur during the first cycle. During the following cyclic loading debonds start to grow along the fiber/matrix interface and this is the main mode of damage progression analyzed in this paper. The extensive debonding reduces the load borne by the broken fiber causing new fiber breaks and connecting the multiple fiber breaks, finally leading to catastrophic rupture of the UD composite. Hence, understanding of the debond growth process in fatigue is crucial for fatigue life analysis in this load region.

Ort, förlag, år, upplaga, sidor
Lancaster: PA Destech Publications Inc. , 2013. s. 981-983
Nationell ämneskategori
Kompositmaterial och -teknik
Forskningsämne
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-34243Lokalt ID: 860dcb85-cffa-4e3d-8ec8-5781635c0ff6ISBN: 978-1-60595-113-3 (tryckt)OAI: oai:DiVA.org:ltu-34243DiVA, id: diva2:1007493
Konferens
International Conference on Composite Science and Technology : 24/04/2013 - 26/04/2013
Anmärkning
Godkänd; 2013; 20150310 (andbra)Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2022-10-27Bibliografiskt granskad

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Varna, JanisPupurs, Andrejs

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