Academic Journal
An iterative crack tip correction algorithm discovered by physical deep symbolic regression
| العنوان: | An iterative crack tip correction algorithm discovered by physical deep symbolic regression |
|---|---|
| المؤلفون: | Melching, David, Paysan, Florian, Strohmann, Tobias, Breitbarth, Eric |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2024 |
| المجموعة: | German Aerospace Center: elib - DLR electronic library |
| مصطلحات موضوعية: | Metallische und hybride Werkstoffe |
| الوصف: | Digital image correlation is a widely used technique in the field of experimental mechanics. In fracture mechanics, determining the precise location of the crack tip is crucial. In this paper, we introduce a novel crack tip detection algorithm based on displacement and strain fields obtained by digital image correlation. Iterative crack tip correction formulas are discovered by applying deep symbolic regression guided by physical unit constraints to a dataset of simulated cracks under mode I, II and mixed-mode conditions with variable T-stress. For the training dataset, we fit the Williams series expansion with super-singular terms to the simulated displacement fields at randomly chosen origins around the actual crack tip. We analyse the discovered formulas and apply the most promising one to digital image correlation data obtained from uniaxial and biaxial fatigue crack growth experiments of AA2024-T3 sheet material. Throughout the experiments, the crack tip positions are reliably detected leading to improved stability of the crack propagation curves. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://elib.dlr.de/204973/2/1-s2.0-S0142112324002901-main.pdf; Melching, David und Paysan, Florian und Strohmann, Tobias und Breitbarth, Eric (2024) An iterative crack tip correction algorithm discovered by physical deep symbolic regression. International Journal of Fatigue. Elsevier. doi:10.1016/j.ijfatigue.2024.108432 . ISSN 0142-1123. |
| الاتاحة: | https://elib.dlr.de/204973/ https://elib.dlr.de/204973/2/1-s2.0-S0142112324002901-main.pdf |
| Rights: | cc_by |
| رقم الانضمام: | edsbas.D0352650 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |