Numerical modeling of a single aluminum sheet containing an interference fit fastener

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Journal titleCanadian Aeronautics and Space Journal
Pages107122; # of pages: 16
SubjectFatigue of materials; Numerical analysis; Stress analysis; Torque; Aluminum; Coated materials; Joints (structural components); Machine design; Mathematical models; Multiple-load steps; Shear strain; Stress variations; Finite element (FE) models; Interference fit fastener; Photoelastic coating; Aluminum; Sheet metal
AbstractThis paper presents the results of an investigation into the three-dimensional stress field around an interference fit fastener hole. Understanding the stress variations in the vicinity of the hole during the entire loading sequence from the fastener set-up process to the tensile-loading stage is extremely useful for the design and builing of a high-fatigue performance joint. Two specimens were tested, each specimen consisted of a single aluminum sheet and an interference fit fastener. A photoelastic coating was bonded to the outer surface (fastener head side) on one specimen and the inner surface (nut side) of the other. An interference fit fastener was installed in a single sheet and then photoelastic analysis was used to measure the strains under different tensile loads. Four different three-dimensional finite element (FE) models of the sheet and fastener/nut structure with and without a coating were generated. A numerical technique is proposed to analyze the fastener-clamping torque, which was employed in the contact numerical simulations. Multiple-load steps in the FE models were used to simulate the entire joining and then tensile-loading stages. A good correlation was achieved between the experimental results and the finite element predictions for the maximum shear strain. The full-field contours of the maximum principal stress under different clamping values and tensile loads were also studied.
Publication date
PublisherCanadian Science Publishing
AffiliationNational Research Council Canada; NRC Institute for Aerospace Research
Access conditionavailable
Peer reviewedNo
NRC numbersmpl-2005-0082
NPARC number8931556
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Record identifiera66566c4-be13-49ba-a809-86b1a33805b6
Record created2009-04-23
Record modified2016-05-09
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