Analysis of thick composite plates using higher order three dimensional finite elements
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Authors
Alon, Yair
Subjects
Finite element
nonlinear analysis
plate bending thick plates
laminated composites
buckling
constant arc length three dimensional element
nonlinear analysis
plate bending thick plates
laminated composites
buckling
constant arc length three dimensional element
Advisors
Kolar, Ramesh
Date of Issue
1990-12
Date
1990-12
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
A triquadratic isoparametric solid element is developed to study the behavior of thick isotropic and laminated composite plates. The element is a 27 noded Lagrangian element based on three dimensional elasticity. Material characteristics are accounted by either using laminate plate theory or three-dimensional anisotropic theory. Element matrices for nonlinear stability analyses are derived based on total Lagrangian formulation. Results are presented to compare with analytical solutions to validate the elements behavior. The effects of various integration schemes on the element performance are presented. Convergence studies for laminated composites for different fiber orientations are provided to illustrate applications. An analysis of thin plates is carried out and results for thick plates are compared with available higher order plate theories. One row of elements in the thickness directions gives satisfactory results for thick laminates.
Type
Thesis
Description
Series/Report No
Department
Aeronautics and Astronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
ix, 89 p. ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copryright owner.