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Effect of extreme temperatures on micro-damage development in CF/polyimide laminates
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Swerea SICOMP AB, Piteå.ORCID iD: 0000-0002-5948-7525
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
2015 (English)In: 20th International Conference on Composite Materials: Copenhagen, 19-24th July 2015, ICCM , 2015, article id 2204-2Conference paper, Published paper (Refereed)
Abstract [en]

CF Thornel® T650 8-harness satin weave fabric composite with thermosetting polyimide NEXIMID® MHT-R resin designed for high service temperatures is produced at around 390°C and therefore high thermal stresses develop after cooling down to room temperature. Thermal transverse stresses in bundles/layers are tensile and lead to multiple intra-bundle /intra-laminar cracking. When the composite plate is subjected to large and repeated temperature variations, new cracks can appear due to thermally induced fatigue stress. Experimental results show that the highest temperature inthe cycle, where thermal stresses are low, has a significant detrimental effect on thermal fatigue resistance. Another observed phenomenon is thermal aging: at high temperature the mechanical properties are degrading with time. Aging and fatigue effects were separately analyzed for quasi-isotropic laminates with lay-up [(+45/-45)/(90/0)]2s.

Place, publisher, year, edition, pages
ICCM , 2015. article id 2204-2
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-72445OAI: oai:DiVA.org:ltu-72445DiVA, id: diva2:1275106
Conference
International Conference on Composite Materials : 19/07/2015 - 24/07/2015
Available from: 2019-01-04 Created: 2019-01-04 Last updated: 2019-01-04Bibliographically approved

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Zrida, HanaFernberg, PatrikVarna, Janis

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CiteExportLink to record
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