6533b82dfe1ef96bd1290912
RESEARCH PRODUCT
Shear coefficient determination in linear friction welding of aluminum alloys
Davide CampanellaMarco CammalleriLivan FratiniGianluca Buffasubject
Aluminum alloyMaterials scienceOscillationMechanical EngineeringAlloyMetallurgyFEM modelchemistry.chemical_elementMechanicsengineering.materialStrength of materialsShear (sheet metal)chemistryShear coefficientMechanics of MaterialsThermocoupleAluminiumengineeringShear stresslcsh:TA401-492General Materials Sciencelcsh:Materials of engineering and construction. Mechanics of materialsFriction weldingLinear friction weldingSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazionedescription
In the present study, a combined experimental and numerical investigation on Linear Friction Welding (LFW) of AA2011-T3 aluminum alloy was carried out in order to find the temperature dependent shear coefficient to be used in a 3D numerical model of the process. Torque, oscillation frequency and pressure were acquired in order to calculate the shear stress at the interface. A numerical thermal model was used to calculate the temperature at the interface between the specimens starting from experimental temperatures acquired through a thermocouple embedded in the LFW specimens. Finally, the calculated shear coefficient was used to model the contact between the two specimens in a dedicated 3D, Lagrangian, thermo-mechanically coupled rigid-viscoplastic numerical model of the LFW process. A narrow range of variation of the shear factor vs temperature curve was found with varying LFW process parameters and good agreement was obtained for the temperature prediction of the 3D model of the process. Keywords: Linear friction welding, Shear coefficient, FEM model, Aluminum alloys
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-10-01 | Materials & Design |