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Influence of the curing cycles on the fatigue performance of unidirectional glass fiber reinforced epoxy composites

Hüther, Jonas; Brøndsted, Povl

Abstract:
During the manufacturing process of fiber reinforced polymers the curing reaction of the resin results in shrinkage of the resin and introduces internal stresses in the composites. When curing at higher temperatures in order to shorten up the processing time, higher curing stresses and thermal stresses are built up and frozen, as residual stresses occur. In the present work, a glass fiber reinforced epoxy composite laminate with an unidirectional architecture based on non-crimp fabrics with backing fibers is investigated. Three different curing cycles (timetemperature cycles) are used, leading to different levels of internal stresses. The mechanical properties, static strength and fatigue life time, are measured in three different directions of the material, i.e. the fiber direction, 0°, the 30° off axis direction, and the 90° direction transverse to the fiber direction. It is experimentally demonstrated that the resulting residual stresses barely influences the quasi-static mechanical properties of reinforced glass-fiber composites. It is found that the fatigue performance in the 0° direction is signicantly influenced by the intern ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1088/1757-899X/139/1/012023
ISSN: 1757-8981, 1757-899X
URN: urn:nbn:de:swb:90-605522
KITopen ID: 1000060552
Erschienen in IOP conference series / Materials science and engineering
Band 139
Heft 1
Seiten Art.Nr.: 012023
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
Bemerkung zur Veröffentlichung 37th Riso International Symposium on Materials Science, Riso CampusRiso, Denmark, September 5-8, 2016
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