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Spot Weld Fatigue Life Prediction by Using Multiaxial Fatigue Criteria’s
Vijay Desai,  Kiran More
In this study, Tailgate (vehicle back door) side hinges systems with the spare wheel condition are considered. When the spare wheel is mounting on tailgate then spare wheel load need to transmit inside body panel because of door sag problem. The spare wheel load transmitted to body panel by reinforcement to hinges and hinges to body panels. In reinforcement system reinforcement panels, brackets are connected to the inner panel by spot welds. In all reinforcement system spot weld is a critical element for static and fatigue failure so it is needed to carefully design for optimum position. In this study, the effects of weld arrangement on the static and fatigue behaviour of the multi-spot welded joints have been investigated. Spot weld pitch, spot weld size and spot weld to trim edge distance suggested by industries are considered. In the simulation part, Tailgate consider as symmetry about carline along Z- axis direction. In half section the number of area are consider and number of possible spot weld arrangement for this areas are tested by finite element analysis by using software ANSYS. Fatigue life calculation is done by using multiaxial fatigue criteria. Four sets of spot weld arrangement are used for evaluation. As per results it is observed that the spot welded arrangement effect has a considerable role in fatigue strength of multi-spot welded joints.
Keywords- Fatigue life, Finite element analysis, Resistance spot welding, Tailgate
Unique Identification Number - IJEDR1503057Page Number(s) - Pubished in - Volume 3 | Issue 3 | August 2015DOI (Digital Object Identifier) -    Publisher - IJEDR (ISSN - 2321-9939)
Cite this Article
Vijay Desai,  Kiran More,   "Spot Weld Fatigue Life Prediction by Using Multiaxial Fatigue Criteria’s"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.3, Issue 3, pp., August 2015, Available at :http://www.ijedr.org/papers/IJEDR1503057.pdf