Linear and nonlinear analyses of thick composite circular plates using the finite-element method
A new finite element for circular plates based on Mindlin's shear-deformable plate theory is developed. Unlike conventional plate elements, these new elements may be stacked on top of one another to model laminated plates. The elements assure continuity of the displacements between the layers, but not continuity of the traction vectors. The element does not account for interlaminar slip or debonding between the layers. Each layer in the laminated plate is allowed an independent rotation. Hence, the model gives more accurate results than classical lamination theory models. The plate element is more efficient than solid elements because it accurately models the structure while keeping the degrees of freedom per element to a minimum. Also, if one uses solid elements to model a laminated circular plate, many more elements would have to be used in the model to avoid loss of accuracy due to a large aspect ratio. The circular-plate element is incorporated into a nonlinear finite-element code based on the total Lagrangian formulation. The inclusion of the shear deformation allows this finite element to model the large deflection of laminated circular plates accurately and efficiently.
- Research Organization:
- Illinois Univ., Urbana, IL (United States)
- OSTI ID:
- 7164173
- Country of Publication:
- United States
- Language:
- English
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