Analysis on Welding Residual Stress for Aluminum Alloy Plate
The residual stress field is the main study problem in the transient heating input process of aluminum alloy welding.Taking 400 mm ×140 mm ×10 mm of 5052 aluminum as the subjects,a reference axis was defined.The design scheme about resistance strain film in aluminum plate surface,drilling depth for 2.5 mm holes used Φ2 mm drill in strain film center.YJ-26 type static resistance strain analyzer was used to measure three element releasing strain,the maximum and minimum principal stress were calculated.Each point equivalent stress was calculated according to the fourth strength theory formula.The residual stress distribution curves were choiced on the path for comparison after dynamic process and welding the numerical simulation.The change rule of welding residual stress were gotten.The study results have very good guidance significance for making rational welding technological parameters in actual production.