The Effect of Preload on Failure Response of Glass-Epoxy Laminated Composite Bolted-Joints with Clearance

Author:

Pakdil Murat1,Sen Faruk2,Sayman Onur1,Benli Semih1

Affiliation:

1. Department of Mechanical Engineering, Dokuz Eylul University Bornova, Izmir, Turkey

2. Department of Mechanical Engineering, Dokuz Eylul University Bornova, Izmir, Turkey,

Abstract

In this study, the effect of preload moments on failure response of glass-epoxy laminated composite bolted-joints with bolt/hole clearance was investigated. To evaluate the effects of bolted-joint geometry and stacking sequence of laminated plates on the bearing strength and failure mode, parametric analyses were performed, experimentally. Two different geometrical parameters, edge distance-to-hole diameter ratio (E/D) and plate width-to-hole diameter ratio (W/D), were examined. For this reason, the E/D ratio was selected from 1 to 5, whereas the W/D ratio was chosen from 2 to 5. Besides, preload moments were applied as 0, 3 and 6 Nm. Due to the estimating material parameters effect, laminated plates were oriented as three different groups, [0°/0°/90°/90°]s, [45°/45°/—45°/—45°]s and [60°/60°/—60°/—60°]s, symmetrically. The experiments were also performed under a clearance for the diameters of the bolt and the circular hole for 5 and 6 mm, respectively. Experimental results showed that failure mode and bearing strength are strictly affected by the magnitude of preload moments. Additionally, if material and geometrical parameters of composite bolted-joints are changed, the failure response is completely influenced by this change.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

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