Strength evaluation for laser overlap weld joints of thin plates
LI Yang
HAN Xiao-hui
ZHANG Shuang-nan
LIU Feng
CAI Gui-xi
Abstract：Aiming at the problem that the strength of laser overlap weld joints of train bodies should be evaluated,the influencing factors and evaluation methods for the strength of weld joints were researched with a method in combination with both experiments and numerical simulation.The numerical simulation was conducted with the software ANSYS,and the phenomenon that the break position changes from the weld joints to the thin plate was verified.The results show that when the weld width is smaller than the thickness of thin plate in two plates, the weld width and shear force approximately show a linear relationship.When the weld width is bigger than the thickness of thin plate,the shear force reaches the maximum value and does not increase with increasing the weld width.In addition,the weld depth and plate gap have no obvious effect on the shear force.According to the established relationship between the weld width and shear force,and the goal of evaluating the strength of weld joints can be realized through measuring the weld width with non-destructive testing.
Keywords：laser overlap weld jointshear testweld widthplate gapweld depthshear forceultrasonic C scanningnon-destructive testing
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 28-33 )