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Preload retention performance of bolted connections locked with adhesive

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Purpose: The cyclic performance of bolted assemblies locked with adhesive are affected by various parameters, such as pitch type, diameter, surface finish, coating type, pre-torque, and loading type. The purpose of this study is to find out the influence of bolt diameter, coating type and pitch type on the preload retention performance of threaded components under cyclic loading conditions. Design/methodology/approach: In this experimental research, the effects of various bolt diameters, coating materials (base material, zinc and zinc phosphate) and pitch type on the preload retention performance of bolted joints were tested. The tests were carried out under cyclic loading conditions. Findings: The highest load cycle was measured at bolts coated with zinc phosphate and the lowest cycle number was measured at zinc coated joints. The fine pitch bolts showed higher retention performance than the coarse pitch ones. To obtain high retention performance, zinc phosphate coated and fine pitch bolts should be used. They offer important economic and technical advantages in cyclic loading conditions. They are resistant to self-loosening under vibration and impact loading. Research limitations/implications: A pneumatic vibration test machine was designed. This machine can be operated only at 25 Hz. Also, this study contains only experimental results. So, the numerical methods can be used in the future research processes. Practical implications: The findings of the experimental study are valid for the specific case of the bolted joint designing. The study helps designers to understand the behaviour of bolted joints with locked adhesive. Originality/value: The main contribution of the study is mostly on the practical side. To the authors’ best knowledge, this paper is one of few studies investigating the design of adhesively bonded threaded joint.
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Bibliogr. 15 poz., rys., tab.
  • Department of Mechanical Engineering, Engineering Faculty, Pamukkale University, Kinikli, 20070 Denizli, Turkey
  • Department of Mechanical Engineering, Engineering Faculty, Pamukkale University, Kinikli, 20070 Denizli, Turkey
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  • [14] (2015).
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