A numerical model of resistance spot welding with spherical tip electrode is developed to incorporate the electro-thermal aspect as well as thermo-elasto-plastic behaviour inherent in this process. The electro-thermal aspect includes the Joule’s resistive heating along the contact surfaces and within the sheet-electrode system due to nonuniform current density distribution in the sheet-electrode. The elasto-plastic deformation of the sheet-electrode interface at higher temperature is included in the thermo-mechanical analysis. The interdependence of those two analyses has been taken care of The model is used to simulate the spot welding in low-carbon steel sheets of 1 mm and 2 mm thickness and HSLA steel sheet of 1 mm thickness. The results are compared with experimental data obtained as a part of this work and also with literature data. The comparison has shown a good agreement in all the cases. The results are later used to draw the thermal cycle curves at different location along the faying surface.

Issue Section:
Research Papers
Topics:
Computer simulation, Welding, Electrodes, Steel sheet, Carbon, Current density, Cycles, Deformation, Heating, Temperature, Thermomechanics
1.
Cho
H. S.
, and
Cho
Y. J.
, “
A Study of Thermal Behaviour in Resistance Spot Welds
,”
Welding Journal
, Vol.
68
, No.
6
,
1989
, pp.
236s–244s
236s–244s
.
2.
De, Amitava, “Finite Element Modelling of Resistance Spot Welding and Its Experimental Verification,” Ph.D. thesis, 1995.
3.
De
A.
,
Gupta
O. P.
, and
Dorn
L.
, “
An Experimental Study of Resistance Spot Welding in 1 mm Thick Sheet of Low Carbon Steel
,”
Proceedings of the Institution of Mechanical Engineers, London (Part B), Journal of Engineering Manufacture
, Vol.
210
,
1966
, pp.
341
–
347
.
4.
De, Amitava, “Numerical Modeling of Resistance Spot Welding Using FEM,” M. Tech. thesis, I. I. T. Kharagpur, 1990.
5.
Gould
J. E.
, “
An Examination of Nugget Development During Spot Welding, Using Both Experimental and Analytical Techniques
,”
Welding Journal
, Vol.
66
, No.
1
,
1987
, pp.
1s–10s
1s–10s
.
6.
Holm, R., Electrical Contacts—Theory and Applications, Springler-Verlag, Berlin/Heidelberg/New York, 4th. Edition, 1967.
7.
Han
Z.
,
Orozco
J.
,
Indacochea
J. E.
, and
Chen
C. H.
, “
Resistance Spot Welding: A Heat Transfer Study
,”
Welding Journal
, Vol.
68
, No.
9
,
1989
, pp.
363s–371s
363s–371s
.
8.
Kim
E. W.
, and
Eagar
T. W.
, “
Measurements of Transient Temperature Response During Resistance Spot Welding
,”
Welding Journal
, Vol.
68
, No.
7
,
1989
, pp.
303s–311s
303s–311s
.
9.
Nied
A. H.
, “
The Finite Element Modelling of the Resistance Spot Welding Process
,”
Welding Journal
, Vol.
63
, No.
4
,
1984
, pp.
123s–132s
123s–132s
.
10.
Nishiguchi
K.
, and
Matsuyama
K.
, “
Influence of Current Wave Form on Nugget Formation Phenomena When Spot Welding Thin Steel Sheet
,”
Welding in the World
, Vol.
25
, No.
11/12
,
1987
, pp.
222
–
244
.
11.
Plonus, A. Martin, Applied Electro-Magnetics, McGraw-Hill Book Company.
12.
Pipes, L. A., Applied Mathematics for Engineers and Physicists, McGraw-Hill Book Company, Third edition, 1978.
13.
Rice
W.
, and
Funk
E. J.
, “
Analytical Investigation of the Temperature Distribution During Resistance Welding
,”
Welding Journal
, Vol.
46
, No.
4
,
1967
, pp.
175s–182s
175s–182s
.
14.
Stevenson, W. D., Jr., Elements of Power System Analysis, McGraw-Hill Book Company, second edition.
15.
Tsai
C. L.
,
Jammal
O. A.
,
Papritan
J. C.
, and
Dickinson
D. W.
, “
Modelling of Resistance Spot Weld Nugget Growth
,”
Welding Journal
, Vol.
71
, No.
2
,
1992
, pp.
47s–54s
47s–54s
.
16.
Wei
P. S.
, and
Ho
C. Y.
, “
Axisymmetric Nugget Growth During Resistance Spot Welding
,”
ASME Journal of Heat Transfer
, Vol.
112
, No.
2
,
1990
, pp.
309
–
316
.
17.
Wei
P. S.
, and
Yeh
C. Y.
, “
Factors Affecting Nugget Growth With Mushy-Zone Phase Change During Resistance Spot Welding
,”
ASME Journal of Heat Transfer
, Vol.
113
, No.
8
,
1991
, pp.
643
–
649
.
18.
Zienkiewicz, O. C, The Finite Element Method, Tata-McGraw Hill, third edition, 1976.
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