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Validation of a novel model for the compressive response of FRP:experiments with different fibre orientations
RISE - Research Institutes of Sweden, Materials and Production, SICOMP. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-2313-6512
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.ORCID iD: 0000-0002-2627-3280
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.
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2017 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Crush tests have been performed on flat unidirectional non-crimp fabric (NCF) coupons with differentfibre orientations as part of the validation of a ply-based damage model for crash. The fibre off-axisangle with respect to the crushing direction ranged from 0º to 90°. The results of the tests indicate thatthe crush stress remains unchanged for off-axis angles between 0° and 15°. The failure mode in thesespecimens was out-of-plane kinking. For 20° and 25° off-axis angles the crush stress dropped 20% andevidence of out-of-plane kinking were harder to find. For 45° off-axis angle a network of matrixcracks develops in the specimen and for 90° off-axis angle a brittle shear failure is observed. It issuggested that the out-of-plane kinking is promoted because of the natural waviness of NCF materialsand that the high in-plane shear stress generated from 20-25° off-axis loading results in a transitionfrom out-of-plane kinking to in-plane kinking. These hypotheses need, however, to be verified by anextended failure analysis of the crush specimens.

Place, publisher, year, edition, pages
2017.
Keywords [en]
Crushing, Mechanical testing, Fibre kinking, Fractography, Non-crimp fabric
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-36300Scopus ID: 2-s2.0-85053103484OAI: oai:DiVA.org:ri-36300DiVA, id: diva2:1263503
Conference
21st International Conference on Composite Materials Xi’an, 20-25th August 2017
Available from: 2018-11-15 Created: 2018-11-15 Last updated: 2019-08-14Bibliographically approved

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Olsson, Robin

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