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Residual Stress Analysis of Composite Tubes Used for Kraft Recovery Boilers
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Panel of tubes mounted for residual stress analysis (above)
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Approach:
- Determine residual stresses due to composite tube material, manufacturing, and service
- Use results to develop and verify FEM models at room temperature
- Employ the models to assess stress during boiler operation and to suggest alternative materials
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| Post weld heat-treatment was shown to remove the tensile stresses and is essential for successfully welding into panels |
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Large tensil stresses were found, posing a serious problem for welding of tube panels
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