Residual stress distribution has been determined in spot welds, which are generally used to join mild steel sheets. Various spot weld configurations were investigated using the full-field, experimental, optical technique of high sensitivity moire´ interferometry. These stresses were found to be in the range 250–300 MPa (tensile) in the center and decreased to 40–100 MPa (tensile) at the edge of the weld nugget. Low cycle fatigue loading of the spot weld caused the residual stress to drop in the weld center by about 30 percent and increase at the edges by as much as 100 percent.
Issue Section:
Technical Papers
1.
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Khanna, S. K., and Han, B., 1997, “Measurement of Residual Stress of Double V Butt Welded Joint by Using Improved Moire´ Interferometry/Hole Drilling Method,” 25th Mid-West Mechanics Conference, Rapid City, SD, pp. 16.7–16.8.
21.
Jung, W. W., and Jang, P. K., 1996, “Fatigue Failure and Reinforcing Method of Spot Welded Area at the Stage of Vehicle Development,” SAE 960553.
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.Copyright © 2001
by ASME
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