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Flexure behavior of composite cantilevers subjected to different environmental conditions

Biegsamkeit von Kompositauslegern unter verschiedenen Umweltbedingungen
Ümran Esendemir, Ertuğrul Durak, Recai Fatih Tunay and Mustafa Reşit Usal
From the journal Materials Testing

Abstract

This publication presents an experimental study which was conducted to examine the effects of various types of environments on the flexural stress and load-deflection relationships of the composite cantilever beams subjected to a single force at their free end for different exposure times. The study includes the testing of five different conditions which are cold, hot, humid, seawater environments and room temperature. Maximum flexure stresses and deflections of cantilever beam are presented analytically, numerically and experimentally. ANSYS FEA program is used for numerical analysis of composite materials. The test results carried out after generally one and two months of exposure to the different environmental conditions show that the flexure stress and deflection of the beams are affected at different levels. Moreover, it is shown that the analytical and numerical results are consistent with the experimental data.

Kurzfassung

In der diesem Beitrag zugrunde liegenden Studie wurde der Einfluss verschiedener Umgebungsbedingungen auf die zeitabhängige Biegespannung von dem freien Ende eines Kompositauslegers unter einer singulären Kraft und deren Einfluss auf das Last-Durchbiegungsverhältnis untersucht. Die Proben wurden kalt, warm, feucht sowie in Meerwasser und Raumtemperatur getestet. Die maximale Biegespannung und die Durchbiegung der Ausleger wurden numerisch und experimentell ermittelt, und zwar jeweils für eine Einwirkzeit von ein und zwei Monaten. Die numerische Analyse der Kompositwerkstoffe wurde mit der FEM-Software ANSYS durchgeführt. Es wurde beobachtet, dass die analytischen und numerischen Ergebnisse mit den experimentellen Daten übereinstimmten.


§Correspondence Address, Aossociate Prof. Dr. Ümran Esendemir, Department of Mechanical Engineering, Süleyman Demirel University, 32260 Isparta, Turkey,

Dr. Ümran Esendemir, born in 1971, received her BSc in Mechanical Engineering in 1991 and her MSc in Mechanical Engineering in 1994. In 1999, she finished her PhD in Mechanical Engineering and she achieved her Assistant Professorship in 2004 and her Associate Professorship in 2011 at the Süleyman Demirel University, Isparta, Turkey. She is the author of about 25 international and 15 national scientific publications. Her investigation is focused on mechanics of composite materials and anisotropic elasticity.

Dr. Ertuğrul Durak, born in 1968, received his BSc in Mechanical Engineering in 1990 and his MSc in Mechanical Engineering in 1993. In 1998, he finished his PhD in Mechanical Engineering and he became Assistant Professor in 1999, Associate Professor in 2005 and Professor in 2010 at the Süleyman Demirel University, Isparta, Turkey. He is the author of about 11 international and 15 national scientific publications. His areas of expertise are tribology and machine element design.

Dr. Recai Fatih Tunay, born in 1977, received his BSc in Mechanical Engineering in 1999 and his MSc in Mechanical Engineering in 2001. In 2007, he finished his PhD in Mechanical Engineering and since 2010, he is Assistant Professor at the Süleyman Demirel University, Isparta, Turkey. He is the author of about 7 international and 2 national scientific publications. His areas of expertise are tribology and powder metallurgy.

Dr. Mustafa Reşit Usal, born in 1961, received his BSc in Mechanical Engineering in 1986 and his MSc in Mechanical Engineering in 1988. In 1994, he finished his PhD in Mechanical Engineering and he is Assistant Professor since 1995 and Associate Professor at the Süleyman Demirel University, Isparta, Turkey, since 2012. He is the author of about 21 international and 11 national scientific publications. His areas of expertise include continuum mechanics, finite element method and applied mathematics.


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Published Online: 2015-04-14
Published in Print: 2015-03-02

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