Pullout performance of modified threads in glass fiber reinforced plastic (GFRP) composites

Faruk Karaca

doi:10.3139/120.111086

Artikel

Pullout performance of modified threads in glass fiber reinforced plastic (GFRP) composites

Faruk Karaca

Veröffentlicht/Copyright: 28. August 2017

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Aus der Zeitschrift Materials Testing Band 59 Heft 9

Abstract

Glass fiber reinforced plastic (GFRP) composite materials are widely used in novel industries. They are generally used in electrical environments due to their high thermal strength and mechanical resistance under present conditions with lower weight. In most of the applications, the GFRP is subjected to screwing for assembling. In this study, the pull-out strength performance of the screw was investigated in view of thread modification. In order to determine the optimum thread minor diameter, several pullout tests were performed. Therefore, the modified values showed significantly a better performance than standard values. This novel design was compared with numerical analyses in ANSYS and it was observed that numerical results had a good agreement with experimental results.

Kurzfassung

Glasfaserverstärkte Plastik-Kompositwerkstoffe finden in neuen Industriezweigen breite Anwendung. Sie werden generell in elektrischen Umgebungen eingesetzt, und zwar aufgrund ihres hohen thermischen Widerstandes und ihrer mechanischen Festigkeit unter Leichtbaubedingungen. Bei den meisten Anwendungen werden glasfaserstärkte Kunststoffe einer Verschraubung beim Zusammenbau von Baugruppen unterworfen. In der diesem Beitrag zugrunde liegenden Studie wird das Auszug-Verhalten einer Schraube unter dem Aspekt der Fasermodifizierung untersucht. Um den optimalen kleinsten Durchmesser der Faser zu ermitteln, wurden verschiedene Auszug-Versuche durchgeführt. Die dabei ermittelten modifizierten Werte wiesen deutlich bessere Leistungseigenschaften als die Standardwerte auf. Das neuartige Design wurde mittels des Programms ANSYS modelliert und dabei wurde beobachtet, dass die numerisch berechneten Ergebnisse mit den experimentellen Resultaten gut übereinstimmen.

*Correspondence Address, Assistant Prof. Dr. Faruk Karaca, Mechanical Engineering Department, Technology Faculty, Firat University, Elazığ, Turkey, E-mail: fkaraca@firat.edu.tr, faruk23karaca@gmail.com

Assist. Prof. Dr. Faruk Karaca, born 1978, received his B. E. degree in Mechanical Education from the University of Firat, Elazığ, Turkey, in 2001, and his M.Tech. and Ph.D. degrees in Mechanical Education School ofthe Natural and Applied Sciences, Elazığ, Turkey, in 2004 and 2010, respectively. In 2009, he joined the Department of Mechanical Education, University of Firat, as a research assistant. Since 2011, he has been working in the Department of Mechanical Engineering, Technology Faculty, where he became Assistant Professor. His current research interests include biomechanics, metal cutting and nontraditional machining processes.

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Published Online: 2017-08-28

Published in Print: 2017-09-01

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https://doi.org/10.3139/120.111086