Abstract
In this paper, it is investigated how a surface layer of epoxy glue will affect the crack propagation of a surface crack. The intension is to reduce or even stop the crack propagation by means of patch layer coating. When adding a patch layer to the surface with small cracks, the layer will attempt to damp the free end of the crack, which will reduce the stress intensity factor and subsequently reduce the crack growth. The considered patch consists of a surface layer of 0.2 mm two component adhesive Epoxy, 3M DP 460. The models described in this work contains five different crack sizes with a patch layer on the surface. The stress intensity factor is computed by means of the J-integral and the FE-model is setup with a nonlinear material model to establish the upper boundary for the patch stress capacity. A reduction of the stress intensity factor of approximately 2 % and a reduction of the crack growth of 5.4-6.1 % for crack sizes of 0.5, l and 2 mm is achieved by applying the patch layer. In the analysis, cracks of 3 mm and 5 mm are rejected due to plastic strain in the patch layer, consequently the effect of
the patch layer is insignificant.
the patch layer is insignificant.
Originalsprog | Engelsk |
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Titel | Proceedings of the 26th Nordic Seminar on Computational Mechanics : Oslo, 23-25 October 2013 |
Redaktører | Anders Logg, Kent-Andre Mardal, Andé Massing |
Antal sider | 4 |
Forlag | Center for Biomedical Computing, Simula Research Laboratory |
Publikationsdato | 2013 |
Sider | 210-213 |
ISBN (Trykt) | 978-82-92593-12-7 |
Status | Udgivet - 2013 |
Begivenhed | The 26th Nordic Seminar on Computational Mechanics - Oslo, Norge Varighed: 23 okt. 2013 → 25 okt. 2013 Konferencens nummer: 26 |
Konference
Konference | The 26th Nordic Seminar on Computational Mechanics |
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Nummer | 26 |
Land/Område | Norge |
By | Oslo |
Periode | 23/10/2013 → 25/10/2013 |
Emneord
- Patch Repairing
- Fatigue Life
- Stress Intensity Factors