Study on Fatigue Property of the Overlap Weldments in the Vehicle Frame  
Author Shuo Weng

 
Co-Author(s) Da-Ang Li; Chun-Xiang Ren; Li-Hui Zhao; Song-Lin Zheng

 
Abstract Hot spot stress method has been widely used to assess the fatigue life of welded joints, but it is difficult to confirm accurately the maximum stress location due to the complicated shape and mechanical property of weldments. To determine the fatigue life of welded joints precisely, the real 3D model has been adopted to calculate stress distribution of the overlap weldments in the present work. The fractural surface morphology observation of welded joints after tensile tests and fatigue tests has been carried out by scanning electron microscope (SEM), the results showed that the fractural cracks originates from where the stress is maximum as calculated from finite element method (FEM). This indicates that FEM used by real 3D fits very well with the results of experiments.

 
Keywords fatigue property; welded joint, finite element method, real 3D model
   
    Article #:  RQD25-1
 
Proceedings of 25th ISSAT International Conference on Reliability & Quality in Design
August 1-3, 2019 - Las Vegas, NV, U.S.A.