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Analysis and test of bonded single lap joints with preformed adherendsA theoretical and experimental study has been conducted to investigate the load transfer of a single lap joint where the adherends have been preformed so that the angle between the line of action of the applied in-plane force and the bond line is reduced. The preforming of the adherend reduces the moment resultant in the adherend at the edge of the overlap region which reduces both the maximum peel and shear stresses in the adhesive, and gives a more uniform shear distribution in the adhesive. An increase in static load transfer of up to 120 percent has been shown, and several orders of magnitude increase in fatigue life have been achieved with modest preform angles. Thus, sizeable benefits can be obtained in the fatigue life or additional load capacity of bonded single lap joints by preforming the adherends.
Document ID
19800050894
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Sawyer, J. W.
(NASA Langley Research Center Hampton, VA, United States)
Cooper, P. A.
(NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 80-0773
Meeting Information
Meeting: Structures, Structural Dynamics, and Materials Conference
Location: Seattle, WA
Start Date: May 12, 1980
End Date: May 14, 1980
Accession Number
80A35064
Distribution Limits
Public
Copyright
Other

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