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Proceedings 2018, 2(8), 514;

Model Based Bolt Preload Monitoring Using Digital Image Correlation

Department of Materials Engineering, KU Leuven, 9000 Ghent, Belgium
Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy
MatchID, 9031 Drongen, Belgium
Department of Civil Engineering, KU Leuven, 3001 Leuven, Belgium
Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
Authors to whom correspondence should be addressed.
Published: 29 June 2018
PDF [378 KB, uploaded 17 July 2018]


Bolt preload is one of the most significant parameters in bolted connections, which affects the static and fatigue performance of bolted connections. Traditional preload measuring methods give an estimation of the preload at the moment of tightening but cannot monitor preloading losses. In this investigation an initial proof of concept of a DIC based approach to relate bolt elongation to bolt preload is presented. Bolt elongation tests were performed to M16 bolts and a calibration method was proposed to obtain the bolt preload-elongation relationship for a given clamping length range.
Keywords: preload; DIC; bolted joints preload; DIC; bolted joints
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Jiménez-Peña, C.; Lavatelli, A.; Balcaen, R.; Rossi, B.; Debruyne, D. Model Based Bolt Preload Monitoring Using Digital Image Correlation. Proceedings 2018, 2, 514.

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