Buckling of Lamianted Plates Using h-p Finite Strips

by M. Zeggane, Washington Univ, St. Louis, United States,
A. Kasagi, Washington Univ, St. Louis, United States,
S. Sridharan, Washington Univ, St. Louis, United States,

Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond


The paper presents a computationally efficient alternative to the finite element method for the initial buckling analysis of long, shear-deformable composite laminates. In addition the paper has the following objectives: (i) Assess the importance of shear deformation in the local buckling of plates in the context of anisotropy and combined loading by comparison with the results given by Kirchhoff theory. (ii) Examine the effect of shear locking as it arises for polynomial shape functions of ascending degrees and the role of reduced and selective integration schemes for low order polynomial displacement functions; and determine whether the artifice of reduced integration can be eliminated by the use of sufficiently high degree polynomial shape functions. Both Lagrange and Legendre type polynomials are considered. Convergence of the solution is studied by increasing number of elements (h-extension) and degree of polynomial enployed for the displacement functions (p-extension).

Subject Headings: Plates | Buckling | Finite element method | Shear deformation | Finite strip method | Polynomials | Laminated materials | Displacement (mechanics)

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