Studies of residual stress in single-row countersunk riveted fuselage lap joints - ABSTRACT ONLY

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Conference46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamical Dynamics and Materials Conference, April 18-21, 2005, Austin, Texas
SubjectForce-controlled method; fuselage lap joint; joint tensile loading stage; micro-strain gauge measurements; riveting process; rivet squeeze force; three-dimensional finite element model
AbstractVariations of stress and strain from the riveting process through the tensile loading stage in lap joints with a single countersunk rivet were studied experimentally and numerically. The joint specimen consisted of two 2.03 mm thick 2024-T3 Al alloy bare sheets and one 2117-T4 Al alloy countersunk MS20426AD8-9 rivet. A force-controlled riveting method was employed to install the rivets in the joints using three different rivet squeeze forces, 35.59 kN, 44.48 kN, and 53.38 kN. After releasing the squeeze forces, the lap joints were then loaded in tension to a maximum stress of 98.5 MPa. In-situ micro-strain gauges were used to measure the strain variations during the entire loading sequence. Three-dimensional (3D) finite element (FE) models were generated to simulate the experimental set up. The material elasto-plastic constitutive relationship and geometric non-linear properties as well as nonlinear contact boundary conditions were included in the numerical simulations. The numerical modeling techniques were validated using the experimental data. The residual minimum principal stress resulting from the riveting process and maximum principal stress when the joints were in tension determined from the FE analyses are present. The stress variations along a prescribed path are also presented. The aim of the research is to develop an accurate 3D numerical technique to study the residual stress and strain as well as the stress and strain variations that occur during the entire loading history.
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
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Peer reviewedYes
NRC numberSMPL-2004-0135
NPARC number8926622
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Record identifier288f2f90-ea38-4937-b176-cd6da70d3c9f
Record created2009-04-23
Record modified2016-05-09
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