Vol. 21 No. 3 (2024): Journal of Non Destructive Testing and Evaluation (JNDE), September 2024
Research Papers

Non-destructive Evaluation (NDE) of Residual Stresses near a Weld Repaired Isogrid Pocket thru Digital Image Correlation (DIC)

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  • Digendranath Swain,
  • Karthigai Selvan S,
  • Darshan Gohel,
  • Binu P Thomas

Published 22-09-2024

Keywords

  • Non-destructive evaluation (NDE),
  • DIC,
  • Residual Stresses,
  • Structural Integrity,
  • TIG welding,
  • Cryogenic Propellant tank
    • ...More
    Less

How to Cite

Digendranath Swain, Karthigai Selvan S, Darshan Gohel, & Binu P Thomas. (2024). Non-destructive Evaluation (NDE) of Residual Stresses near a Weld Repaired Isogrid Pocket thru Digital Image Correlation (DIC). Journal of Non-Destructive Testing & Evaluation (JNDE), 21(3), 54–60. Retrieved from https://jnde.isnt.in/index.php/JNDE/article/view/134

Copyright (c) 2024 Journal of Non-Destructive Testing & Evaluation (JNDE)

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Abstract

Over the years, DIC has been exploited for numerous NDE applications where quantitative structural behavior was also evaluated. These applications include material flaws, structural integrity at stress-raisers, weld-mismatch zones, brazing anomalies, debonding skin sheets in composite panels, thermal protection systems (TPS) integrity, and snap-through buckling, among others. However, this technique was never employed to evaluate the structural integrity through residual stress measurement. This paper explores such a possibility where the evaluation of residual stresses and structural integrity of a crack-repaired iso-grid pocket with TIG welding on the cylindrical shell of a cryogenic propellant tank is attempted. The details of the test protocol and the results are presented in this paper.   

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