Local Buckling of Composite FRP Shapes by Discrete Plate Analysis
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Volume 127, Issue 3
Abstract
An analytical study of local buckling of discrete laminated plates or panels of fiber-reinforced plastic (FRP) structural shapes is presented. Flanges of pultruded FRP shapes are modeled as discrete panels subjected to uniform axial in-plane loads. Two cases of composite plate analyses with different boundary conditions and elastic restraints on the unloaded edges are presented. By solving two transcendental equations simultaneously, the critical buckling stress resultant and the critical value of the number of buckled waves over the plate aspect ratio are obtained. Using this new solution technique and regression analysis, simplified expressions for predictions of plate buckling stress resultants are efficiently formulated in terms of coefficients of boundary elastic restraints. The effects of restraint at the flange-web connection are considered, and explicit expressions for the coefficients of restraint for I- and box-sections are given; it is shown that actual cases lie between simply supported and fully restrained (clamped) conditions. The theoretical predictions show good agreement with experimental data and finite-element eigenvalue analyses for local buckling of FRP columns. In a similar manner, web plate elements of FRP shapes under in-plane shear loads are modeled with and without elastic restraints provided by the flange panels. The present formulation can be applied to several cases to determine local buckling capacities of laminated plates with elastic restraints along the unloaded edges and can be further used to predict the local buckling strength of FRP shapes, such as columns and beams.
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References
1.
Bank, L. C., Nadipelli, M., and Gentry, T. R. (1994a). “Local buckling and failure of pultruded fiber-reinforced plastic beams.” ASME J. Engrg. Mat. and Technol., 116, 233–237.
2.
Bank, L. C., Nadipelli, M., Gentry, T. R., and Yin, J. S. (1994b). “Local buckling of pultruded FRP beams: Theory and experiment.” Proc., Struct. Congr. '94, N. C. Baker and B. J. Loodno, eds., ASCE, New York, 417–422.
3.
Bank, L. C., and Yin, J. S. (1996). “Buckling of orthotropic plates with free and rotationally restrained unloaded edges.” Thin-Walled Struct., 24, 83–96.
4.
Banks, W. M., and Rhodes, J. (1981). “The post-buckling behavior of composite box sections.” Proc., Int. Conf. on Compos. Struct., Applied Science Publishers, Essex, England, 402–414.
5.
Banks, W. M., and Rhodes, J. (1983). “The instability of composite channel sections.” Proc., Int. Conf. on Compos. Struct., Applied Science Publishers, Essex, England, 442–452.
6.
Barbero, E. J. (1992). “Buckling of FRP columns.” Final Rep. Prepared for Creative Pultrusions, Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, W.Va.
7.
Barbero, E. J. (2000). “Prediction of buckling-mode interaction in composite column.” Mech. of Compos. Mat. and Struct., 7, 269–284.
8.
Barbero, E. J., and Raftoyiannis, I. G. (1993). “Local buckling of FRP beams and columns.”J. Mat. in Civ. Engrg., ASCE, 5(3), 339–355.
9.
Bleich, F. (1952). Buckling strength of metal structures, McGraw-Hill, New York.
10.
Brush, D. O., and Almroth, B. O. (1975). Buckling of bars, plates, and shells, McGraw-Hill, New York.
11.
Bulson, P. S. (1969). The stability of flat plates, Elsevier Science, New York.
12.
Davalos, J. F., and Qiao, P. Z. (1997). “Analytical and experimental study of lateral and distortional buckling of FRP wide-flange beams.”J. Compos. for Constr., ASCE, 1(4), 150–159.
13.
Davalos, J. F., Salim, H. A., Qiao, P. Z., Lopez-Anido, R., and Barbero, E. J. (1996). “Analysis and design of pultruded FRP shapes under bending.” Compos., Part B: Engrg. J., 27B(3-4), 295–305.
14.
Jones, R. M. (1975). Mechanics of composite materials, Hemisphere Publishing, New York.
15.
Kohnke, P. (1996). ANSYS—Theory reference, 7th Ed., ANSYS, Houston, Pa.
16.
Lee, D. J. (1978). “The local buckling coefficient for orthotropic structural sections.” Aeronautical J., 82(811), 313–320.
17.
Lee, D. J. (1979). “Some observations on the local instability of orthotropic structural sections.” Aeronautical J., 83, 110–114.
18.
Lee, D. J., and Hewson, P. J. (1978). “The use of fiber-reinforced plastics in thin-walled structures.” Stability problems in engineering structures and composites, T. H. Richards and P. Stanley, eds., Applied Science Publishers, London, 23–55.
19.
Qiao, P. Z. (1997). “Analysis and design optimization of fiber-reinforced plastic (FRP) structural beams.” PhD dissertation, West Virginia University, Morgantown, W. Va.
20.
Qiao, P. Z., Davalos, J. F., Barbero, E. J., and Troutman, D. L. (1999). “Equations facilitate composite designs.” Modern Plastics Mag., 76(11), 77–80.
21.
Turvey, G. J., and Marshall, I. H., eds. (1995). Buckling and postbuckling of composite plates, Chapman & Hall, London.
22.
Wang, J. L., and Qiao, P. Z. (2000). “Computation of local buckling strength of FRP composite plates elastically restrained along the unloaded edges.” Internal Rep. ACMSL#2000-1, Advanced Composite Materials and Structures Laboratory, Department of Civil Engineering, The University of Akron, Akron, Ohio.
23.
Webber, J. P. H., Holt, P. J., and Lee, D. A. (1985). “Instability of carbon fiber reinforced flanges of I section beams and columns.” Compos. Struct., 4, 245–265.
24.
Whitney, J. M. (1987). Structural analysis of laminated anisotropic plates, Technomic Publishing, Lancaster, Pa.
25.
Yoon, S. J. (1993). “Local buckling of pultruded I-shape columns.” PhD dissertation, Georgia Institute of Technology, Atlanta.
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Received: May 3, 2000
Published online: Mar 1, 2001
Published in print: Mar 2001
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