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

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Proceedings title46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Conference46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, April 18-21, 2005, Austin, Texas
Pages27832800; # of pages: 18
SubjectFinite element modeling; force-controlled riveting method; lap joints; micro-strain gauges; residual stress and strain; squeeze force; stress and strain variations; tensile loading
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.
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AffiliationNational Research Council Canada; NRC Institute for Aerospace Research
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Peer reviewedYes
NRC numberSMPL-2005-0024
NPARC number8933273
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Record identifierd588aefb-c741-4129-ad7e-d5d51088bfdd
Record created2009-04-23
Record modified2016-05-09
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