The Study of Fatigue Behavior of Glass Fiber Reinforced epoxy(GFRP) Composite Under Different Stress Levels

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Moghaddas Mousavi Zadeh Alireza; Zabett Ahad; Sahebian saghi ُSamane

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Journal Paper

Paper Information

Journal: Journal of Metallurgical and Materials Engineering Year:2022 | Volume:33 | Issue:2 Page(s): 1-12

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Information Journal Paper

Title

The Study of Fatigue Behavior of Glass Fiber Reinforced epoxy(GFRP) Composite Under Different Stress Levels

Author(s)

Moghaddas Mousavi Zadeh Alireza | Zabett Ahad | Sahebian saghi ُSamane | Issue Writer Certificate

Keywords

GFRP Composite

Fatigue

Epoxy

glass fiber

Abstract

The aim of this study is to investigate the Fatigue behavior of GFRP Composite with biaxial fiber orientation [0,90] under different stress levels. First, the tensile test was performed and the UTS value was 420 MPa. Then, Fatigue test was performed at 4 stress levels of 70, 50, 42 and 35% of UTS. Fatigue results had acceptable dispersion and the fitting curve on the data also matched well. Finally, the Fatigue failure structures of 70 and 35% of UTS samples, using scanning electron microscopy (SEM) were evaluated. The results showed that in both 70 and 35% samples, the mechanism of pull out fibers was obsvered but its intensity was higher in 35% sample. Also in the 35% sample, significant distortion was observed which was absent in the 70% sample. On the other hand, the brittle failure of matrix was more pronounced in the 70% sample than in the 35% sample. This can be related to the increase of the matrix softness due to the application of cyclic load.

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