Flexure behavior of composite cantilevers subjected to different environmental conditions

Ümran Esendemir; Ertuğrul Durak; Recai Fatih Tunay; Mustafa Reşit Usal

doi:10.3139/120.110705

Article

Flexure behavior of composite cantilevers subjected to different environmental conditions

Ümran Esendemir , Ertuğrul Durak , Recai Fatih Tunay and Mustafa Reşit Usal

Published/Copyright: April 14, 2015

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From the journal Materials Testing Volume 57 Issue 3

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, umranesendemir@sdu.edu.tr

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.

References

1 G.Rathnakar, H.K.Shivanan: Experimental evaluation of strength and stiffness of fibre reinforced composites under flexural loading, Int. J. Eng. and Innovative Tech.2 (2008), No. 7, pp. 219–222Search in Google Scholar

2 TAlmusallam, Y.Al-Salloum, S.Alsayed, A.Alhozaimy: Durability of GFRP rebars in stressed concrete beams at different environments, Proc. of the 6^th Saudi Eng. Conf. KFUPM, Dhahran (2002), pp. 263–276Search in Google Scholar

3 T. H.Almusallam: Load-deflection behavior of RC beams strengthened with GFRP sheets subjected to different environmental conditions, Chem. Concr. Compos.28 (2006), pp. 879–88910.1016/j.cemconcomp.2006.07.017Search in Google Scholar

4 J. F.Davalos, Y.Chen, I.Ray: Long-term durability prediction models for GFRP bars in concrete environment, J. Compos. Mater.46 (2011), pp. 1899–191410.1177/0021998311427777Search in Google Scholar

5 E. L.Tan, B.Uy: Nonlinear analysis of composite beams subjected to combined flexure and torsion, J. Const. Steel Res.67 (2011), pp. 790–79910.1016/j.jcsr.2010.12.015Search in Google Scholar

6 A. C.Manalo, T.Aravinthan, W.Karunasena: Flexural behaviour of glue-laminated fibre composite sandwich beams, Compos. Struct.92 (2010), pp. 2703–271110.1016/j.compstruct.2010.03.006Search in Google Scholar

7 B.Saikia, P.Kumar, J.Thomas, K. S. N.Rao, A.Ramaswamy: Strength and serviceability performance of beams reinforced with GFRP bars in flexure, Constr. Build. Mater.21 (2007), pp. 1709–171910.1016/j.conbuildmat.2006.05.021Search in Google Scholar

8 I. F.Kara, A.F.Ashour, C.Dundar: Deflection of concrete structures reinforced with FRP bars, Compos. B44 (2013), pp. 375–38410.1016/j.compositesb.2012.04.061Search in Google Scholar

9 E.Ghafoori, M.Motavalli: Flexural and interfacial behavior of metallic beams strengthened by prestressed bonded plates, Compos. Struct.101 (2013), pp. 22–3410.1016/j.compstruct.2013.01.021Search in Google Scholar

10 G.Rathnakar, H.K.Shivanan: Experimental evaluation of strength and stiffness of fibre reinforced composites under flexural loading, Int. J. Eng. and Innovative Tech.2 (2013), No. 7, pp. 219–222Search in Google Scholar

11 S. G.Lekhnitskii: Anisotropic Plates, Gordon and Breach Science Publishers, New York, USA (1968)Search in Google Scholar

12 R. M.Jones: Mechanics of Composite Materials, McGraw-Hill Kogakusha, Tokyo, Japan (1975)Search in Google Scholar

13 O.Kılıç, A.Aktaş, M. H.Dirikolu: An investigation of the effects of shear on the deflection of an orthotropic cantilever beam by use of anisotropic elasticity theory, Compos. Sci. Technol.61 (2001), pp. 2055–206110.1016/S0266-3538(01)00101-4Search in Google Scholar

14 Ü.Esendemir: Failure analysis of woven glass-epoxy prepreg bolted joints under different clamping moments, Adv. Compos. Lett.17 (2008), pp. 165–17510.1177/096369350801700504Search in Google Scholar

15 ANSYS Help Manual, 10.0Search in Google Scholar

16 M. J.Nollet, D.Perraton, O.Chaallal: Flexural behavior of CFRP strengthened RC beams at room and freezing temperatures, Proc. of the 8th Intern. Conf. on Structural Faults and Repairs, London, UK (1999), pp. 1–7Search in Google Scholar

17 HuangGu, SunHongxia: Effect of water absorption on the mechanical properties of glass/polyester composites, Mater. Des, 28 (2007), pp. 1647–165010.1016/j.matdes.2006.03.014Search in Google Scholar

18 T. H.Almusallam, Y.A.Al-Salloum, S.H.Alsayed, S.El-Gamla, M.Agel: Tensile properties degradation of glass fiber-reinforced polymer bars embedded in concrete under severe laboratory and field environmental conditions, J. Compos. Mater.47 (2012), pp. 393–40710.1177/0021998312440473Search in Google Scholar

19 J.Garai, C.Ray: Initial failure analysis of laminated composite plates under humid conditions, J. Reinf. Plast. Compos.24 (2005), No. 11, pp. 1203–121210.1177/0731684405048844Search in Google Scholar

20 T. H.Almusallam, Y.A.Al-Salloum: Durability of GFRP rebars in concrete beams under sustained loads at severe environments, J. Compos. Mater.40 (2006), pp. 623–63710.1177/0021998305055275Search in Google Scholar

21 L.Bian, JXiao, J.Zeng, S.Xing: Effects of seawater immersion on water absorption and mechanical properties of GFRP composites, J. Compos. Mater.46, No. 25 (2012), pp. 3151–316210.1177/0021998312436992Search in Google Scholar

22 A. H. I.Mourad, B.M.Abdel-Magid, T.El-Maaddawy, M.E.Grami: Effect of seawater and warm environment on glass/epoxy and glass/polyurethane composites, Appl. Compos. Mater.17 (2010), pp. 557–57310.1007/s10443-010-9143-1Search in Google Scholar

Published Online: 2015-04-14

Published in Print: 2015-03-02

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https://doi.org/10.3139/120.110705