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

Document Type : Original Article

Authors

• alireza moghaddas mousavi zadeh
• Ahad Zabett
• ُSamane Sahebian

Department of Material Science and Engineering, Ferdowsi university of Mashhad, Mashhad, Iran.

10.22067/jmme.2022.72975.1029

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.

Keywords

• GFRP Composite
• fatigue
• epoxy
• glass fiber

20.1001.1.20087462.1401.33.2.1.1

Main Subjects

• Advanced Materials

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