The effects of spot weld model on the numerical simulation of spot welded closed top-hat section sheet metal beams subjected to quassistatic and impact loading conditions were investigated using coupled experimental-numerical approach. Strength tests were performed to find the stiffness curves of spot weld in lap-shear, cross-tension (opening load), in-plane rotation (torsion) and peel specimens. The specimens were made from plain carbon steel and high strength low alloy steel sheets of three representative thicknesses. The local weld properties obtained from these tests were used to model a spot weld using different element types available in LSDYNA. These models were used in the numerical simulation of the beams subjected to static and dynamic axial crushing and static bending. The results obtained from the numerical analyses were validated by experiments on spot welded top-hat section sheet metal beams.

1.
Volz, A. K., 1998, “Spot Weld Modeling for Crash Computations, Requirements and Functionalities in LS-DYNA, Version 940,” 5th International LS-DYNA Users Conference, Livermore Software Technology Corporation, 1998.
2.
Hamze, R. and Rouxel-Duval, L., 1999, “Mechanical Behavior Model of Resistance Spot Weld Joints for Body Structure Crash Simulation,” SAE Paper No. 1999-01-3189.
3.
Dong, P., 1999, “A Framework for Modeling Spot Welds in Finite Element Analysis of Auto-Body Structures,” SAE Paper No. 1999-01-3191.
4.
Sun, X., Dong, P., Reisner, M., Low, E., 1999, “Modeling of Resistance Spot Welds: From Process to Performance,” SAE Paper No. 1999-01-3211.
5.
Pal
K.
and
Cronin
D. L.
,
1995
, “
Static and Dynamic Characteristics of Spot Welded Sheet Metal Beams
,”
ASME J. of Engineering for Industry
,
117
, pp.
316
322
.
6.
Lee
M. M. K.
,
Pine
T.
,
Jones
T. B.
,
2000
, “
Automotive box section design under torsion, Part 1: Finite element modeling strategy
,”
Proc., Institution of Mechanical Engineers, Part D, J. of Automobile Engineering
,
214
, No.
D4
, pp.
347
359
.
7.
ANSI/AWS/SAE/D8.9–97, 1997, Recommended Practices for Test Methods for Evaluating the Resistance Spot Welding Behavior of Automotive Sheet Steel Materials, American Welding Society, Miami.
8.
Wung, P., Walsh, T., Ourchan, A., and Stewart, W., 1999, “The Ignored Failure Mode: Spot Weld Under In-Plane Rotation (Physical Test),” SAE Paper No. 1999-01-3212, Presented at International Body Engineering Conference, Detroit, MI, Feb. 23–27.
9.
Sawhill, J. M. Jr., and Furr, S. T., 1981, “Spot Weldability Tests for High-Strength Steels,” SAE Paper No. 810352.
10.
VandenBossche, D. J., 1977, “Ultimate Strength and Failure Mode of Spot Welds in High Strength Steels,” SAE Paper No. 770214.
11.
Chao
Y. J.
,
2003
, “
Ultimate Strength and Failure Mechanism of Resistance Spot Weld Subjected to Tensile, Shear, or Combined Tensile / Shear Loads
,”
ASME J. of Engineering Materials and Technology
,
125
, pp.
125 to 132
125 to 132
.
12.
Livermore Software Technology Corporation, LS-DYNA User’s Manual, Version 970.
13.
Radaj, D., 1990, Design and Analysis of Fatigue Resistant Welded Structures, Abington Publishing, pp. 326.
This content is only available via PDF.
You do not currently have access to this content.