Stress Analysis of a Flange Stiffened FRP Composite Panel with Varying Stacking Sequence

Abstract:

Large panel structures made of composites are common building units in aerospace industries. In order to increase the stiffness of such structures, the panel or skin is adhered to a flange and supported by a web. Such a stiffened panel is modeled as an arrangement of web, flange and panel with an interface between the flange and the panel. In this paper, three dimensional stress analysis of one such stiffened panel has been carried out using the finite element analysis. The geometric non-linearity has been assumed in the analysis. The effect of material anisotropy and the laminate stacking sequence on the stress components has been studied. Material Graphite Fiber Reinforced Polymeric (GFRP) composite has been used and, two different configurations were considered while the unidirectional prepregs were laid up in quasi-isotropic [0/0/0/0]₂ and cross-ply [0/90/90/0]₂. Subsequently, the coupled stress failure criterion has been used to predict the critical location of damage onset. When component damage indicator attained the value of 1.0, the component was considered to lose stiffness and structural integrity.

• Periodical: Key Engineering Materials (Volume 847)
• Pages: 9-14
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.847.9
• Online since: June 2020
• Authors: Nabam Teyi*, Santosh Kumar Tamang
• Keywords: Fiber Reinforced Polymer (FRP), Finite Element Analysis, Flange Stiffened Panel

References

[1] Y. Tan, G. Wu, S.S. Suh, J.M. Yang, H.T. Hah, Damage tolerance and durability of selectively stitched stiffened composite structures, Int. J. of Fatigue. 30 (2008) 483−492.

DOI: 10.1016/j.ijfatigue.2007.04.008

[2] P.Alagusundaramoorthy, R.Sundaravadivelu, C.Ganapathy, Experimental study on collapse load of stiffened panels with cutouts, J of Const. Steel Res. 52 (1999) 235−251.

DOI: 10.1016/s0143-974x(99)00008-5

[3] S.A. Hitchen, R.M.J Kemp, The effect of stacking sequence on damage in carbon fiber/ epoxy composite, Composites. 26 (1995) 207−214.

DOI: 10.1016/0010-4361(95)91384-h

[4] W.J. Cantwell, The influence of fiber stacking sequence on the high velocity impact response of CFRP, J. of Mat. Sc. Letters. 7 (1998) 756−758.

[5] S.A. Suarez, R.F. Gibson, C.T. Sun, S.K. Chaturvedi,The influence of fiber length and fiber orientation on damping and stiffness of polymer composite materials,Exp. Mech. 26 (1986) 175−184.

DOI: 10.1007/bf02320012

[6] S.R. Dyer, L.V.J. Lassila, M.Jokinan, P.K. Vallute, Effect of fiber orientation fracture load on fiber reinforced composite, Dental Mat. 20 (2004) 947−955.

DOI: 10.1016/j.dental.2003.12.003

[7] N.D. Flesher, C.T. Herakovich,Predicting delamination in composite structures, Composites Sc. and Tech. 66 (2006) 745-754.

DOI: 10.1016/j.compscitech.2004.12.039

[8] S.K. Panigrahi, B.Pradhan,Onset and growth of adhesion failure and delamination induced damages in double lap joint of laminated FRP composites, Composite Structures 85 (2008) 326-336.

DOI: 10.1016/j.compstruct.2007.10.036