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#17535, Determination of Stresses from Strain Field Measured by Digital Image Correlation for Hole-Drilling Method

The hole drilling method primarily utilises strain gauge rosettes for measuring the released deformation after material removal. Moreover, deformation can be measured using optical techniques, offering numerous advantages. Digital image correlation (DIC) is an optical measurement technique with wide applicability that does not require laboratory conditions. However, its application in the hole-drilling method is challenging, since the sensitivity of this method is relatively low compared to other optical methods or strain gauge rosette measurements. This study aimed to assess the applicability of DIC in the context of the hole-drilling method. To achieve this, several experiments were conducted to measure the strain field around a drilled hole in a steel specimen. Throughout these experiments, various concepts were introduced and tested to enhance the accuracy of the stress evaluation. Based on the results obtained, it may be suggested that DIC has the potential to be an alternative to the strain gauge rosette.

David Halabuk   Brno University of Technology