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Validating numerically predicted make-up of threaded connections using digital image correlation and infrared monitoring

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Abstract
To ensure a reliable connection between two pipe sections, an initial make-up is applied to the threaded connections to induce a favorable stress state. Using finite element analysis techniques, it is possible to predict the internal strains and stresses of the connection when torque is applied. This article presents the outline of an experimental setup, which allows to directly validate the occurring strains together with the torque versus turn diagram and indirectly the contact pressures. The strains are measured by means of digital image correlation and strain gages. Both methods provide similar results and comply with the predicted finite element analysis strains when taper mismatch is taken into account. In an effort to qualitatively validate the simulated contact pressures, the temperature of the box is measured during make-up by means of infrared monitoring. The maximum temperature increase occurs near the vanishing threads where contact pressures are larger. Despite promising results, no decisive validation for the contact pressures could be obtained.
Keywords
Threaded connection, make-up, digital image correlation, thermography, validation

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Chicago
Galle, Timothy, Jan De Pauw, Wim De Waele, Jeroen Van Wittenberghe, and Patrick De Baets. 2014. “Validating Numerically Predicted Make-up of Threaded Connections Using Digital Image Correlation and Infrared Monitoring.” Journal of Strain Analysis for Engineering Design 49 (7): 492–500.
APA
Galle, T., De Pauw, J., De Waele, W., Van Wittenberghe, J., & De Baets, P. (2014). Validating numerically predicted make-up of threaded connections using digital image correlation and infrared monitoring. JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, 49(7), 492–500.
Vancouver
1.
Galle T, De Pauw J, De Waele W, Van Wittenberghe J, De Baets P. Validating numerically predicted make-up of threaded connections using digital image correlation and infrared monitoring. JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN. SAGE; 2014;49(7):492–500.
MLA
Galle, Timothy, Jan De Pauw, Wim De Waele, et al. “Validating Numerically Predicted Make-up of Threaded Connections Using Digital Image Correlation and Infrared Monitoring.” JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN 49.7 (2014): 492–500. Print.
@article{5703354,
  abstract     = {To ensure a reliable connection between two pipe sections, an initial make-up is applied to the threaded connections to induce a favorable stress state. Using finite element analysis techniques, it is possible to predict the internal strains and stresses of the connection when torque is applied. This article presents the outline of an experimental setup, which allows to directly validate the occurring strains together with the torque versus turn diagram and indirectly the contact pressures. The strains are measured by means of digital image correlation and strain gages. Both methods provide similar results and comply with the predicted finite element analysis strains when taper mismatch is taken into account. In an effort to qualitatively validate the simulated contact pressures, the temperature of the box is measured during make-up by means of infrared monitoring. The maximum temperature increase occurs near the vanishing threads where contact pressures are larger. Despite promising results, no decisive validation for the contact pressures could be obtained.},
  author       = {Galle, Timothy and De Pauw, Jan and De Waele, Wim and Van Wittenberghe, Jeroen and De Baets, Patrick},
  issn         = {0309-3247},
  journal      = {JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN},
  language     = {eng},
  number       = {7},
  pages        = {492--500},
  publisher    = {SAGE},
  title        = {Validating numerically predicted make-up of threaded connections using digital image correlation and infrared monitoring},
  url          = {http://dx.doi.org/10.1177/0309324714533328},
  volume       = {49},
  year         = {2014},
}

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