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Element-removal glo...
Element-removal global digital image correlation for accurate discontinuous deformation field measurement in fracture mechanics
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- Chen, Bin (författare)
- KTH,Biokompositer,Wallenberg Wood Science Center
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- Coppieters, Sam (författare)
- Department of Materials Engineering, KU Leuven, Ghent Technology Campus, Gebroeders De Smetstraat 1, 9000 Ghent, Belgium
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- Jungstedt, Erik (författare)
- KTH,Wallenberg Wood Science Center,Biokompositer
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
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Ingår i: Engineering Fracture Mechanics. - : Elsevier BV. - 0013-7944 .- 1873-7315. ; 290
- Relaterad länk:
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https://doi.org/10.1...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We propose an element-removal (ER) global digital image correlation (DIC) method to improve the measurement accuracy of discontinuous deformation fields, such as crack propagation. The occurrence of cracks in materials or structures inevitably deteriorates the tracking accuracy, and, consequently, the strain field accuracy obtained by regular subset and global DIC. The proposed ER-global-DIC algorithm iteratively identifies and removes all the elements covering the crack, during the updating of displacement fields. In the remaining elements, the continuous shape function is applicable for accurate deformation measurement. In principle, although elements that contain the cracks are removed, the algorithm preserves the same number of nodes since the nodes are retained by the remaining elements. Synthetically deformed images based on analytical discontinuous displacement fields validate the effectiveness and accuracy of the proposed method. The ER-global-DIC is further applied to measure the discontinuous displacement fields containing a crack deflection, generated from a finite element model with a cohesive zone model. The results demonstrate the potential of the proposed method for discontinuous deformation measurement on advanced materials, e.g., fiber-reinforced composites.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Cohesive zone model
- Crack
- Crack deflection
- Discontinuous deformation
- Element removal global digital image correlation
- Fracture
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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