Optimization of Joint Strength of Adhesively Bonded Glass Fiber Epoxy Based Double Strap Butt Joint
Satnam Singh1, Surjit Angra2, Vikas Kumar3

1Satnam Singh*, Department of Mechanical Engineering, National Institute of Technology, Kurukshetra-136119, India
2Surjit Angra, Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, India.
3Vikas Kumar, Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, India.
Manuscript received on July 20, 2019. | Revised Manuscript received on August 10, 2019. | Manuscript published on August 30, 2019. | PP: 5022-5025 | Volume-8 Issue-6, August 2019. | Retrieval Number: F9541088619/2019©BEIESP | DOI: 10.35940/ijeat.F9541.088619
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Fiber reinforced composite laminates has various industrial applications. It is important to investigate the joining methods of composite laminates. In this research paper, the effect of overlap length (OL), surface roughness (SR) and adhesive layer thickness (ALT) on the strength and failure modes of adhesively bonded double strap GFRP (glass fiber reinforced epoxy based composite laminate) butt joint was investigated. The adhesively bonded double strap GFRP butt joints were prepared from unidirectional glass fiber and epoxy by hand layup technique as per ASTM standard. The number of experiments was optimised using Taguchi’s L9 approach. It is observed that the variation in overlap length has significant effect on butt joint strength. It is also observed that SR and ALT are less significant factors in comparison to OL. It is concluded that increase in ALT adversely affect the butt joint strength. The failure mode in specimens was generally thin layer cohesive failure or light fiber tear failure.
Keywords: Optimisation, Joint strength, Overlap, Surface roughness.