Stress and Deflection Analysis of Mechanically Fastened Joints

Item

Title
Stress and Deflection Analysis of Mechanically Fastened Joints
Date
1970
Index Abstract
Not Available
Photo Quality
Undetermined
Report Number
AFFDL TR 70-49
Creator
Harris, Harry G.
Ojalvo, Irving U.
Hooson, Reginald E.
Corporate Author
Grumman Aerospace Corporation
Laboratory
Air Force Flight Dynamics Laboratory
Extent
288
Identifier
AD0709221
Access Rights
This document has been approved for public release and sale; its distribution is unlimited
Distribution Classification
1
Contract
F33615-69-C-1263
DoD Project
1467
DoD Task
146704
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Abstract
The report presents analytical techniques for predicting both the linear and nonlinear stresses and deformations of mechanically fastened joints. The idealization used is a set of stacked parallel plates which transfer planar loads among themselves by means of transverse fasteners. The plates are treated by finite element methods of matrix structural analysis in which each element is assumed to be in plane stress for both elastic and plastic stress states. The fasteners, which are treated by short-beam theory, interact with the plates under the assumption that the plates may be represented by an equivalent elastic foundation. Application of the present analytical techniques was made to a variety of problems including: the combined elastic-plastic behavior of plates with unloaded holes, the load-deflection behavior of single-fastener joints, the residual stress distributions in plates with squeeze rivets, the effect of fastener bending and shear deformation on the bearing stress distribution between the fastener and the plate, and the prediction of the fatigue life of typical mechanically fastened joints. In all these cases, comparisons with test results generally gave very good correlation. For the range of parameters studied, the effects of hole clearance and fastener interference and geometric configuration appear to play the dominant roles in determining the stress distribution and hence, the fatigue life of mechanically fastened joints.
Report Availability
Not available via Contrails
Date Issued
1970-05
Index In
DTIC
Type
report