Whole-field residual stress measurement in rail using moiré interferometry and twyman/green interferometry via thermal annealing

1999 ◽  
Vol 39 (1) ◽  
pp. 71-76 ◽  
Author(s):  
B. S. Wang ◽  
F. P. Chiang ◽  
S. Y. Wu
Keyword(s):  
Residual Stress ◽  
Thermal Annealing ◽  
Stress Measurement ◽  
Moiré Interferometry ◽  
Residual Stress Measurement ◽  
Moire Interferometry

Residual Stress Measurement in Spot Welds and the Effect of Fatigue Loading on Redistribution of Stresses Using High Sensitivity Moire´ Interferometry

2000 ◽  
Vol 123 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Sanjeev K. Khanna ◽  
Canlong He ◽  
Hari N. Agrawal
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Low Cycle Fatigue ◽  
High Sensitivity ◽  
Fatigue Loading ◽  
Moiré Interferometry ◽  
Spot Weld ◽  
Moire Interferometry ◽  
Spot Welds ◽  
Full Field

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.

Noise-insensitive contour method for residual stress measurement in laser butt welding

2021 ◽  
Vol 165 ◽  
pp. 107861
Author(s):  
Hao Jiang ◽  
Junjun Liu ◽  
Zhenkun Lei ◽  
Ruixiang Bai ◽  
Zhenfei Guo ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Contour Method ◽  
Butt Welding
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