DIC based crack tip tracking system for multiaxial fatigue

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00369733" target="_blank" >RIV/68407700:21340/23:00369733 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/5.0145020" target="_blank" >https://doi.org/10.1063/5.0145020</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0145020" target="_blank" >10.1063/5.0145020</a>

Result language
angličtina
Original language name
DIC based crack tip tracking system for multiaxial fatigue
Original language description
Multiaxial fatigue testing generates curved cracks that are extremely difficult to characterize using standard compliance-based and potential drop-based methods. Therefore, an automated online system was developed to monitor the crack tips positions in plate cruciform specimens. The system periodically evaluates the de formation fields at small areas around the crack tips by performing digital image correlation (DIC) on images obtained by a moving camera triggered at desired phases of the loading cycle. The displacement field obtained by DIC is fitted by a simple model that specifies the crack propagation direction and enables it to iteratively find new crack tip positions. Moreover, the model is capable of computing the crack opening displacements near the crack tip and thus characterizes the local loading. This approach enables fully automated multiaxial testing with controlled crack length and crack tip loading. The method was successfully tested on an AA5754 aluminium alloy sheet.
Czech name
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Czech description
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Project
<a href="/en/project/EF16_019%2F0000778" target="_blank" >EF16_019/0000778: Center for advanced applied science</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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