Low temperature and tightening torque effects on the failure response of bolted glass fiber/epoxy composite joints

This article reports an experimental investigation on failure responses of single lap double serial fastener joints in glass fiber/epoxy composite laminates when subjected to low-temperature environment. The results of experiments, implemented at five different low-temperature levels ranging from 0℃...

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Bibliographic Details
Published in:Journal of composite materials 2013-12, Vol.47 (26), p.3257-3268
Main Authors: Soykok, Ibrahim F, Sayman, Onur, Ozen, Mustafa
Format: Article
Language:English
Subjects:
Applied sciences
Bearing
Exact sciences and technology
Forms of application and semi-finished materials
Laminates
Polymer industry, paints, wood
Technology of polymers
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Summary:This article reports an experimental investigation on failure responses of single lap double serial fastener joints in glass fiber/epoxy composite laminates when subjected to low-temperature environment. The results of experiments, implemented at five different low-temperature levels ranging from 0℃ to −40℃, were evaluated in comparison with room temperature tests. Joints exhibited relatively higher load-carrying capacities with increased stiffness by decreasing temperature. In order to examine tightening torque effects at each temperature condition, bolts were fastened under M = 6 Nm and M = 0 Nm (finger tightened) torques. As expected, a greater amount of bearing load could be carried by the joints with pre-tightened fasteners. Furthermore, any reduction in temperature is observed to lift the effectiveness of tightening torque on the joint strength. Regardless of the temperature exposed, bearing mode, the most desirable failure type in mechanically fastened joints was monitored as the main failure mode.
ISSN:0021-9983
1530-793X
DOI:10.1177/0021998312463828