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Nodal Constraint, Shear Deformation and Continuity Effects Related to the Modeling of Debonding of Laminates, Using Plate ElementsThe effects of several critical assumptions and parameters on the computation of strain energy release rates for delamination and debond configurations modeled with plate elements have been quantified. The method of calculation is based on the virtual crack closure technique (VCCT), and models of the upper and lower surface of the delamination or debond that use two-dimensional (2D) plate elements rather than three-dimensional (3D) solid elements. The major advantages of the plate element modeling technique are a smaller model size and simpler configurational modeling. Specific issues that are discussed include: constraint of translational degrees of freedom, rotational degrees of freedom or both in the neighborhood of the debond front, shear deformation assumptions; and continuity of material properties and section stiffness in the vicinity of the debond front. Where appropriate, the plate element analyses are compared with corresponding two-dimensional plane strain analyses.
Document ID
20020085520
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Glaessgen, E. H.
(NASA Langley Research Center Hampton, VA United States)
Riddell, W. T.
(Federal Aviation Administration Cambridge, MA United States)
Raju, I. S.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Publication Information
Publication: CMES
Publisher: Tech Science Press
Volume: 3
Issue: 1
Subject Category
Composite Materials
Distribution Limits
Public
Copyright
Other

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