A Flat-Facet Quadrilateral Element for Linear Elastic Analysis of Laminated Composite Plates and Shells


  1. Smith, M.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
A flat-facet quadrilateral shell element 'Shell4' has been developed for linear-elastic static finite element (FE) analysis of laminated composite and non-composite applications in ship structures. The element formulation was developed by combining state-of-the-art formulations for quadrilateral plate bending and quadrilateral membrane elements with first-order shear deformation theory (FSDT) for laminates. The element is intended for use with general plate and shell configurations, involving isotropic, orthotropic, or composite material properties. In-plane rotations, also known as drilling degrees of freedom, have been included to permit correct element assembly in kinked or folded-plate type configurations, and special provision has been made for warped geometries. The element has been implemented in a finite element programme recently developed at DREA for linear static and first-ply failure analysis of composite structures. It is shown to pass all of the necessary patch tests to gaurantee convergence. Validation is carried out using examples of isotropic beam and shell structures and composite plates taken from the finite element literature. The element is found to perform excellently for a number of problems involving a simply supported, uniformly-loaed composite plate. TRUNCATED
Fibre reinforced polmer;Laminate;Flat-facet;Quadrilaterl shell element
Report Number
DREA-TM-1999-210 — Technical Memorandum
Date of publication
01 Jan 2000
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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