Experimental Investigation of Repair of Glass Epoxy Composite with Edge and Center Crack by Epoxy Resin

Document Type : Special Issue: Mechanics of Advanced Fiber Reinforced Composite Structures

Authors

1 Simcrash Center, Department of Aerospace Engineering, Hindustan Institute of Technology and Science, Chennai 603103, India

2 Department of Aeronautical Engineering, Hindustan Institute of Technology and Science, Chennai 603103, India

Abstract

The aerospace and automotive industries widely use composite materials due to their weight-to-strength ratios. One of the most significant problems with composites is repair and maintenance. This study attempts to repair glass epoxy composites. The repair process involves two stages: 1)optimization of the position of the hole and 2) repair work. To optimize the repair techniques, two distinct holes were performed: 1) at the center of the specimen and 2) at the edges of the specimen. As a result, the hole drilled at the center gives higher strength than the hole drilled at the edges. After the optimization, samples were repaired with a single hole in the center and peak loads of 60% and 90%. The cracked and delaminated areas were repaired with epoxy/hardener. The repaired samples were subjected to a three-point bending test, and the results were compared with the Neat GFRP samples. The results show that the curves of the repaired samples aligned with both the post and the residual flexural strength. The residual flexural strength of the 60% and 90% peak-loaded repaired samples retains about 47% and 76%, respectively.

Keywords

Main Subjects

References

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Mechanics of Advanced Composite Structures
Volume 12, Issue 2 - Serial Number 25
Special Issue on Mechanics of Advanced Fiber-Reinforced Composite Structures: Celebrating the 50th Anniversary of Semnan University, Handled by the Esteemed Journal Editor, Prof. Dr. Mavinkere Rangappa Sanjay - In Progress
August 2025
Pages 371-377

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