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

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

Two different interlaminar fatigue testing methods have been compared by testing a carbon fiber 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 end-notched fl...

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Bibliographic Details
Published in:Polymer testing Vol. 63; pp. 307 - 313
Main Authors: Szebényi, Gábor, Magyar, Balázs, Iványicki, Tamás
Format: Journal Article
Language:English
Published: Barking Elsevier Ltd 01-10-2017
Elsevier BV
Subjects:
Carbon fiber reinforced plastics
Carbon-epoxy composites
Continuous fiber composites
Crack propagation
Cyclic loads
Failure analysis
Fatigue
Fatigue failure
Fatigue tests
Fiber composites
Fiber reinforced composites
Fiber reinforced polymers
Flexing
Fracture analysis
Fracture surfaces
Interlaminar properties
Multi wall carbon nanotubes
Nanocomposites
Photomicrographs
Polymer matrix composites
Studies
Fracture analysis
Fatigue
Interlaminar properties
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Summary:Two different interlaminar fatigue testing methods have been compared by testing a carbon fiber 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 end-notched 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.
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2017.08.033