Abstract
A new geometric approach for discrete crack growth modeling is proposed and implemented in a commercial FEM software. The basic idea is to model the crack growth by removing volumes of material as the crack front advances. Thereby, adaptive meshing techniques, found in commercial software, is well-suited for relatively fast and reasonable meshing of the updated geometry. Influence on structural stiffness is negligible, as the amount of removed material is kept insignificant. The approach is automatized in ANSYS APDL and demonstrated by means of energy-based mixed mode stress intensity factors and the crack growth direction criterion by Richard. The applicability of the implemented approach is validated against a previously published experimental result, which tests a mixed mode I + III fatigue loading of a modified CT specimen. The proposed approach may be used as a computational framework for modeling of 2D and 3D crack growth, combined with different crack growth (direction/rate) models.
Original language | English |
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Title of host publication | 28th Nordic Seminar on Computational Mechanics : Proceedings of the NSCM28 |
Editors | Arkadi Berezovski, Kert Tamm, Tanel Peets |
Number of pages | 4 |
Place of Publication | Tallinn |
Publisher | Institute of Cybernetics at Tallinn University of Technology |
Publication date | 2015 |
Pages | 117-120 |
ISBN (Print) | 978-9949-430-95-6 |
ISBN (Electronic) | 978-9949-430-96-3 |
Publication status | Published - 2015 |
Event | The 28th Nordic Seminar on Computational Mechanics - Tallinn, Estonia Duration: 22 Oct 2015 → 23 Oct 2015 Conference number: 28 |
Conference
Conference | The 28th Nordic Seminar on Computational Mechanics |
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Number | 28 |
Country/Territory | Estonia |
City | Tallinn |
Period | 22/10/2015 → 23/10/2015 |
Bibliographical note
The proceedings cover illustration is reproduced from the extended abstract of Morten Eggert Nielsen from Aalborg University.Keywords
- Computational modeling
- FEM
- Adaptive remeshing techniques
- LEFM
- Fatigue crack growth