Automated crack detection and measurement based on digital image correlation
By Nicola Gehri, Jaime Mata‐Falcón, W. Kaufmann. Construction and Building Materials, 2020
266 citations recorded by the source corpus.
Abstract The acquisition and evaluation of the crack behaviour in experiments on quasi-brittle materials, such as concrete, mortar, or masonry is essential for understanding their structural behaviour. This publication presents a fully automated procedure to detect cracks and measure crack kinematics in laboratory experiments instrumented with digital image correlation (DIC). Crack lines are extracted using well-established image processing methods showing excellent agreement with the physical crack pattern. In contrast to most existing crack detectors that rely on pixel intensities of true images, the presented crack detection is based on the DIC principal tensile strain field what allows the extraction of much finer cracks and more reliable crack locations. The crack widths and slips are measured using the DIC displacement field accounting for local rotations of the specimen. Additionally, automated visualisations of the crack kinematic measurements including data smoothing are presented. Several sensitivity analyses evaluating the performance and the uncertainty of the crack detector and the crack kinematic measurements have been conducted. These analyses show that the obtained results depend on the DIC configuration and that the procedure is limited in the case of very closely spaced cracks. With appropriate DIC parameters, the procedure allows detecting crack locations with high precision and measuring crack kinematics very accurately even in large-scale experiments with complex crack patterns.
Subfields: Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/a991ae089328bc6d1c2137a55c33ed19fd408480
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In Civil and Structural Engineering
Citations in the corpus
- Structural behaviour of 3D printed concrete beams with various reinforcement strategies (2021, methodology): “From the results, the crack patterns and their associated kinematics were computed with the Automated Crack Detection and Measurement procedure [60].”