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Stress analysis of a rectangular implant in laminated composites using 2-D and 3-D finite elementsAn analysis method using the FEM based on the Hellinger-Reissner variation principle has been developed to determine the 3-D stresses and displacements near a rectangular implant inside a laminated composite material. Three-dimensional elements are employed in regions where the interlaminar stress is considered to be significant; 2-D elements are used in other areas. Uniaxially loaded graphite-epoxy laminates have been analyzed; the implant was modeled as four plies of 3501/6 epoxy located in the middle of the laminate. It is shown that the interlaminar stresses are an order of magnitude lower than the stress representing the applied far-field load. The stress concentration factors of both the interlaminar and in-plane stresses depend on the stacking sequence of the laminate.
Document ID
19920051742
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chow, Wai T.
(NASA Langley Research Center Hampton, VA, United States)
Graves, Michael J.
(MIT Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 92-2477
Meeting Information
Meeting: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Location: Dallas, TX
Country: United States
Start Date: April 13, 1992
End Date: April 15, 1992
Accession Number
92A34366
Funding Number(s)
CONTRACT_GRANT: NAG1-1216
Distribution Limits
Public
Copyright
Other

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