ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
For many years, rivet joint technology has been applied in the automotive and aerospaceindustry. Recently, it began to apply laser welding technology to lap joints instead of rivet joining.Laser spot welding has some potential advantages including time saving, cost reduction, materialsaving and weight reducing. A lap joint of aluminum alloy LY12 with different plate thickness,namely 2mm and 1mm, was spot-welded by CO2 laser. For the welding, laser power in pulse formwith ramping-up and cooling-down shape was used, and pure helium gas served as shielding gas tofill around welding area. In this study transient three-dimensional non-linear finite elementmodeling was used to analyze heat flow and residual stress of the laser spot welding of aluminumalloy LY12. In modeling the temperature dependence of material properties, influence of contactsurfaces are taken into account. To analyze, Gaussian distributed heat source model andthermo-elasto-plastic behavior were applied. Weld dimensions and residual stress at the weldsurface were calculated numerically and compared with the experimental results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.580-582.291.pdf
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