American Journal of Mechanical Engineering
ISSN (Print): 2328-4102 ISSN (Online): 2328-4110 Website: Editor-in-chief: Kambiz Ebrahimi, Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Mechanical Engineering. 2015, 3(4), 135-141
DOI: 10.12691/ajme-3-4-5
Open AccessArticle

The Effect of Defence Hole System on the Failure Load and Bearing Strength of GFRP Bolted Joint

Khudhayer J. Jadee1, and A.R. Othman2

1Technical Engineering College-Baghdad, Middle Technical University, Baghdad, Iraq

2School of Mechanical Engineering, Universiti Sains Malaysia, Malaysia

Pub. Date: August 17, 2015

Cite this paper:
Khudhayer J. Jadee and A.R. Othman. The Effect of Defence Hole System on the Failure Load and Bearing Strength of GFRP Bolted Joint. American Journal of Mechanical Engineering. 2015; 3(4):135-141. doi: 10.12691/ajme-3-4-5


The introduction of an auxiliary holes (or defence hole system) near the main hole has provided several benefits in redistributing the stress flows, hence increasing the failure load. This paper presents the experimental study on the effect of the defence hole system (DHS) on the failure load and bearing strength of the glass fibre reinforced polymer (GFRP) composite bolted joint. A series of bearing tests have been carried out on a double lap bolted joint for a wide range of geometric parameters for the cases of without and with the DHS. It was found that adding the auxiliary hole near the bolt-hole has contributed in improving the failure load up to 34.81% increment, with most of the laminates with the defence hole system have failed at higher failure loads.

defence hole system composite bolted joint bearing test failure load

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