Comparison of static and fatigue interlaminar testing methods for continuous fiber reinforced polymer composites

Szebényi, Gábor and Magyar, Balázs and Iványiczki, Tamás (2017) Comparison of static and fatigue interlaminar testing methods for continuous fiber reinforced polymer composites. Polymer Testing, 63. pp. 307-313. ISSN 0142-9418, ESSN: 1873-234

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Abstract

reinforced epoxy (CF/EP) composite and a carbon fiber/multiwalled carbon nanotube reinforced epoxy (CF/MWCNT/EP) hybrid nanocomposite. The first, conventional fatigue testing method was the endnotched flexure (ENF) test, which was used as a reference. The second, novel technique was the fatigue interpretation of the double-notch shear (DNS) test. Both tests have been performed with static and cyclic loading to compare the evaluated properties of the different systems, the effect of transition from cyclic to fatigue loading and to demonstrate if the complex ENF test can be replaced by the simpler DNS test. The test results showed the slight beneficial effect of the nanoreinforcement in both static and cyclic load conditions, and the possibility to use the DNS test for fatigue testing of continuous fiber reinforced composites. The SEM micrographs taken of the fracture surfaces of the composites after the different interlaminar tests provide valuable data on the interlaminar failure phenomena of hybrid nanocomposites in both static and fatigue loading conditions.

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