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A finite-element analysis including transverse shear effects for applications to laminated plates

1971; American Institute of Aeronautics and Astronautics; Volume: 9; Issue: 5 Linguagem: Inglês

10.2514/3.6295

1533-385X

Charles W. Pryor, Richard M. Barker,

Structural Analysis and Optimization

A finite-element analysis technique which includes the effects of transverse shear deformation and is readily adaptable to arbitrary laminated plates is described. The discrete element employed is a rectangle with 28 degrees-of-freedom which include extension, bending, and transverse shear deformation states. The displacement formulation is based on a refined theory for laminates which allows the deformed normal to rotate to include transverse shear deformations. Results for plate deformations and internal stress distributions, including transverse shear stresses, are shown to compare quantitatively with the theory of elasticity for selected example problems. Additional results for laminate deformation behavior are in good agreement with the shear deformation theory of Ambartsumyan. The method described can easily be incorporated into existing matrix analysis schemes which can then be used with confidence in analyzing advanced composite structures.