Fatigue Delamination Behavior of GFRP Composites under Mixed-Mode I/II Loading

Document Type : Research Article

Authors

Department of Mechanical Engineering, Faculty of Engineering & Technology, International Islamic University, Islamabad, PAKISTAN

Abstract

Delamination is a severe threat to the wide use of composite laminates in primary structural applications. Delamination grows under fatigue loading and leads to structural failure. Very few studies exist on mixed-mode delamination on carbon fiber however glass fiber was not studied under mixed mode. The objective of this paper is to investigate fatigue delamination growth under mixed-mode loading in Glass Fiber Reinforced Polymer (GFRP). A mixed-mode bending fixture was developed and fabricated. Fatigue delamination growth tests were performed for different mixed-mode loading using that fixture. With the help of a Scanning Electron Microscope, micro examinations of the crack surface were carried out. The results showed a high growth rate for the case with more contribution of mode I. The Fractographic investigation performed on the different samples showed the existence of mode-I and mode-II features and broken fiber’s confirming fiber bridging during delamination growth. The fractographic features varied systematically with mode shift.

Keywords

References

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Iranian Journal of Chemistry and Chemical Engineering
Volume 42, Issue 10 - Serial Number 132
October 2023
Pages 3546-3554

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