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Numerical Characterization of a Composite Bonded Wing-BoxThe development of composite wing structures has focused on the use of mechanical fasteners to join heavily-loaded areas, while bonded joints have been used only for select locations. The focus of this paper is the examination of the adhesive layer in a generic bonded wing box that represents a "fastenerless" or unitized structure in order to characterize the general behavior and failure mechanisms. A global/local approach was applied to study the response of the adhesive layer using a global shell model and a local shell/solid model. The wing box was analyzed under load to represent a high-g up-bending condition such that the strains in the composite sandwich face sheets are comparable to an expected design allowable. The global/local analysis indicates that at these wing load levels the strains in the adhesive layer are well within the adhesive's elastic region, such that yielding would not be expected in the adhesive layer. The global/local methodology appears to be a promising approach to evaluate the structural integrity of the adhesively bonded structures.
Document ID
Document Type
Conference Paper
Smeltzer, Stanley S., III (NASA Langley Research Center Hampton, VA, United States)
Lovejoy, Andrew E. (NASA Langley Research Center Hampton, VA, United States)
Satyanarayana, Arunkumar (ATK Space Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
April 7, 2008
Subject Category
Structural Mechanics
Meeting Information
49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference(Schaumburg, IL)
Distribution Limits
Public Use Permitted.

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