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http://dx.doi.org/10.12989/scs.2016.21.6.1211

A study on natural frequencies and damping ratios of composite beams with holes  

Demir, Ersin (Department of Mechatronics Engineering, Pamukkale University)
Publication Information
Steel and Composite Structures / v.21, no.6, 2016 , pp. 1211-1226 More about this Journal
Abstract
In this study, free vibration and damping characteristics of composite beams with holes are investigated, experimentally and numerically. Two types of samples with different fabrics are used: unidirectional and woven. The effects of diameter, number and location of circular holes on the vibration characteristics of composite beams are examined. The effects of rotation angle and minor to major diameter ratio of the elliptical hole are also investigated numerically. Moreover, the mode shapes of all types of beams are obtained numerically. According to the results, the natural frequency decreases with increasing hole diameter but increases very little with increasing the distance between the hole center and the clamped end. Damping ratio decreases by increasing the diameter of hole. But it fluctuates by increasing the diameters of holes of beam having three holes. Furthermore it decreases by increasing the distance between hole center and clamped end except for the range 50 mm to 100 mm.
Keywords
free vibration; damping; experimental analysis; finite element analysis; glass fibers;
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1 Stanescu, M.M., Bolcu, D., Pastrama, S.D., Ciuca, I., Manea, I. and Baciu, F. (2010), "Determination of damping factor at the vibrations of composite bars reinforced with carbon and Kevlar texture", Revista de Materiale Plastice, 47(4), 492-496.
2 Abdilrazzaq, T.K. (2013), "The effect of circular holes on the natural frequencies of a beam using transverse vibration measurements method", AL Rafdain Engineering Journal, 21(2), 13-24.
3 Atlihan, G., Demir, E., Girgin, Z. and Callioglu, H. (2009), "Free Vibration and Buckling Analysis of the Laminated Composite Beams", Adv. Compos. Lett., 18(2), 37-44.
4 Baba, B.O. and Thoppul, S. (2010), "An experimental investigation of free vibration response of curved sandwich beam with face/core debond", J. Reinf. Plast. and Comp., 29(21), 3208-3218.   DOI
5 Berthelot, J.M., Assarar, M., Sefrani, Y. and El Mahi, A. (2008), "Damping analysis of composite materials and structures", Compos. Struct., 85(3), 189-204.   DOI
6 Callioglu, H., Demir, E., Yilmaz, Y. and Girgin, Z. (2014), "Vibration behavior of a radially functionally graded annular disc with variable geometry", Sci. Eng. Compos. Mater., 21(3), 453-461.
7 Chandra, R., Singh, S.P. and Gupta, K. (1999), "Damping studies in fiber-reinforced composites - A review", Compos. Struct., 46(1), 41-51.   DOI
8 Ergun, E. and Alkan, V. (2014), "Assessment of Thermal Effects on the Free Vibration Characteristics of Composite Beams", Mater. Test., 56(1), 59-64.   DOI
9 Erklig, A., Bulut, M. and Yeter, E. (2013), "Effects of cutouts on natural frequency of laminated composite plates", Sci. Eng. Compos., Mater., 20(2), 179-185.
10 Georgiev, V.B., Cuenca, J., Gautier, F., Simon, L. and Krylov, V.V. (2011), "Damping of structural vibrations in beams and elliptical plates using the acoustic black hole effect", J. Sound. Vib., 330(11), 2497-2508.   DOI
11 Gibson, R.F. (1994), Principles of Composite Material Mechanics, McGraw-Hill.
12 James, P., Krishna, D.M., Kotresh, G. and Varughese, B. (2009), "Finite element analysis of inter spar ribs of composite wing of light transport aircraft against brazier load", NCSCST, 57-68.
13 Kapuria, S., Bhattacharyya, M. and Kumar, A.N. (2008), "Bending and free vibration response of layered functionally graded beams: A theoretical model and its experimental validation", Compos. Struct., 82(3), 390-402.   DOI
14 Kiral, Z., Icten, B.M. and Kiral, B.G. (2012), "Effect of impact failure on the damping characteristics of beam-like composite structures", Compos. Part B-Eng., 43(8), 3053-3060.   DOI
15 Krodkiewski, J.M. (2008), Mechanical Vibration, Design and Print Centre University of Melbourne, Australia.
16 Lee, W.M. and Chen, J.T. (2011), "Free vibration analysis of a circular plate with multiple circular holes by using indirect Biem and addition theorem", J. Appl. Mech-T Asme., 78(1), 010015. DOI: 10.1115/1.4001993   DOI
17 Naghipour, M. and Mehrzadi, M. (2007), "Evaluation of dynamic properties of extra light weight concrete sandwich beams reinforced with CFRP", Steel Compos. Struct., Int. J., 7(6), 457-468.   DOI
18 O'Boy, D.J. and Krylov, V.V. (2011), "Damping of flexural vibrations in circular plates with tapered central holes", J. Sound. Vib., 330(10), 2220-2236.   DOI
19 Ozturk, H. (2015), "Vibration analysis of a pre-stressed laminated composite curved beam", Steel Compos. Struct., Int. J., 19(3), 635-659.   DOI
20 Sayer, M. (2014), "Elastic properties and buckling load evaluation of ceramic particles filled glass/epoxy composites", Compos. Part B-Eng., 59, 12-20.   DOI
21 Sen, F. and Sayman, O. (2009), "Experimental failure analysis of two-serial-bolted composite plates", J. Appl. Polym. Sci., 113(1), 502-515.   DOI