Fatigue Analysis of Resistance Spot Welded Single Lap Joint using FEM
Mr. Ganesh R. Shelke,  Prof. P. N. Awachat
The aim of this study is to prediction fatigue life of structure, the stress states developed in the structure should be determined accurately. For this purpose, a commercial FEA software, ANSYS (version 15) is used. fatigue failure thus becomes
the most critical failure mode for a structure itself or the region around it under fluctuating stresses. A designer should seek the ways of increasing fatigue strength of a joint to ensure the safety of the whole structure. Resistance spot welding is the most preferred method to join metal sheets. The design variables for spot-weld joints affecting their strengths are basically sheet thickness, spot weld nugget diameter, number of spot welds and the joint type as exemplified in tensile shear (TS) specimens. In order to accurately determine the stress , a nonlinear finite element analysis was carried out taking into account plastic deformations, residual stresses developed after unloading and contacting of spot welded surfaces.
Keywords- fatigue life prediction; finite element analysis; Sheet thickness; spot weld.
Cite this Article
Mr. Ganesh R. Shelke,  Prof. P. N. Awachat,   "Fatigue Analysis of Resistance Spot Welded Single Lap Joint using FEM"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.4, Issue 2, pp.1213-1221, May 2016, Available at :http://www.ijedr.org/papers/IJEDR1602215.pdf