پديدآورندگان :
Afshari Davood dafshari@znu.ac.ir Assistant Professor, Faculty of Engineering, University of Zanjan, Iran, Zanjan; , Mirzaahmadi Soheil sohelmirzaahmadi.znu@gmail.com Master of Science, University of Zanjan, Iran, Zanjan; , Ghaffari Ali Master of Science, University of Zanjan, Iran, Zanjan , Lotfi Afshin Master of Science, University of Zanjan, Iran, Zanjan
كليدواژه :
Resistance spot weld , Residual stress , Thermal contact conductance , Electrical contact conductance , AZ61 magnesium alloy sheet
چكيده فارسي :
In this study thermal and electrical contact conductance (TCC and ECC) between AZ61 Mg alloy sheets have been measured and calculated to use in a structural-thermal-electrical finite element (FE) model in order to predict distribution of residual stresses in resistance spot weld (RSW). The thermal and electrical contact conductances have been considered in FE model in 3 different types: constant, linear and temperature dependent to investigate the effects of these parameters on accuracy of the FE model. The results show that ECC has significant effect in nugget enlargement and distribution of residual stresses but TCC has a little effect. Therefore, the ECC should be assumed to be temperature dependent, whereas TCC can be considered as constant.
