Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31097
Comparative Parametric Analysis on the Dynamic Response of Fibre Composite Beams with Debonding

Authors: Indunil Jayatilake, Warna Karunasena

Abstract:

Fiber Reinforced Polymer (FRP) composites enjoy an array of applications ranging from aerospace, marine and military to automobile, recreational and civil industry due to their outstanding properties. A structural glass fiber reinforced polymer (GFRP) composite sandwich panel made from E-glass fiber skin and a modified phenolic core has been manufactured in Australia for civil engineering applications. One of the major mechanisms of damage in FRP composites is skin-core debonding. The presence of debonding is of great concern not only because it severely affects the strength but also it modifies the dynamic characteristics of the structure, including natural frequency and vibration modes. This paper deals with the investigation of the dynamic characteristics of a GFRP beam with single and multiple debonding by finite element based numerical simulations and analyses using the STRAND7 finite element (FE) software package. Three-dimensional computer models have been developed and numerical simulations were done to assess the dynamic behavior. The FE model developed has been validated with published experimental, analytical and numerical results for fully bonded as well as debonded beams. A comparative analysis is carried out based on a comprehensive parametric investigation. It is observed that the reduction in natural frequency is more affected by single debonding than the equally sized multiple debonding regions located symmetrically to the single debonding position. Thus it is revealed that a large single debonding area leads to more damage in terms of natural frequency reduction than isolated small debonding zones of equivalent area, appearing in the GFRP beam. Furthermore, the extents of natural frequency shifts seem mode-dependent and do not seem to have a monotonous trend of increasing with the mode numbers.

Keywords: Finite Element Modelling, dynamic response, debonding, FRP beams

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 143

References:


[1] D. Elmalich, and O. Rabinovitch, “A high-order finite element for dynamic analysis of soft-core sandwich plates,” Journal of Sandwich Structures & Materials, vol. 14, no 5, pp.525–555, 2012.
[2] Jansons, V.Kulakov, A. Aniskevich, and Lagzdiņš. “Structural composites − from aerospace to civil engineering applications,” Innovations and Technologies News, vol. 17, pp3-12, 2012.
[3] A.K Gand, T. M. Chan, T. Mottram, (2013). “Civil and structural engineering applications, recent trends, research and developments on pultruded fiber reinforced polymer closed sections: a review” Front. Struct. Civ. Eng., 7(3): 227–244.
[4] V. Rizov, A. Shipsha, D. Zenkert, “Indentation study of foam core composite composite panels,” Compos. Struct, vol 69, pp 95-102, 2005.
[5] V. N. Burlayenko and T. Sadowski, “Linear and Nonlinear Dynamic Analyses of Sandwich Panels with Face Sheet-to-Core Debonding,” Shock and Vibration, vol. 2018, Article ID 5715863, 26 pages, 2018. https://doi.org/10.1155/2018/5715863
[6] A.C.Manalo, T. Aravinthan, W. Karunasena, “Flexural behaviour of glue-laminated fibre composite sandwich beams,” Composite Structures, vol 92, pp 2703–2711, 2010.
[7] A.C.Manalo, T. Aravinthan, W. Karunasena, M.M.Islam, “Flexural behaviour of structural fibre composite sandwich beams in flatwise and edgewise positions,” Composite Structures, vol 92 (4), pp 984-995, 2010.
[8] M.M. Islam, T. Aravinthan, “Behaviour of structural fibre composite sandwich panels under point load and uniformly distributed load,”Composite Structures, 93, pp 206–15, 2010.
[9] Z.K. Awad, T. Aravinthan, Y. Zhuge, “Experimental and numerical analysis of an innovative GFRP sandwich floor panel under point load,” Engineering Structures, vol 41, pp 126–135,2010.
[10] W. Karunasena, The effect of debonding on the natural frequencies of laminated fibre composite sandwich plates. Proceedings of 6th Australasian Congress on Applied Mechanics, ACAM 6 , 12-15 December 2010, Perth, Australia, 2010.
[11] I. Jayatilake , W. Karunasena and W. Lokuge, “Dynamic behaviour of debonded GFRP composite beams,” Journal of Multifunctional Composites, vol. 1 (2), pp. 113-122, 2013.
[12] V. N. Burlayenko and T. Sadowski, “Finite element nonlinear dynamic analysis of sandwich plates with partially detached facesheet and core,” Finite Elements in Analysis and Design, vol 62, pp 49-64, 2012.
[13] STRAND7, Strand7 finite element analysis FEA software, Release 2.4.1, Sydney, Australia J. 2010, (website: www.strand7.com).
[14] V. N. Burlayenko and T. Sadowski, “Dynamic behaviour of sandwich plates containing single/multiple debonding,” Computational Materials Science, vol 50 (4), pp 1263-1268, 2011.
[15] G.H. Schwarts, O. Rabinovich, Y. Frostig, “Free vibrations of delaminated unidirectional sandwich panels with a transversely flexible core-a modified Galerkin approach,”. Journal of Sound and Vibration, vol 301, pp 253-277,2007
[16] G.H. Schwarts, O. Rabinovich, Y. Frostig, “Free vibration of delaminated unidirectional sandwich panels with a transversely flexible core and general boundary conditions - A high-order approach,” Journal of Sandwich Structures & Materials, vol 10, pp 99-131, 2008.