Abstract
A model for pits evolution with subsequent crack formation and growth is presented. The model states a moving boundary problem, where a chemical attack advances the boundary via material dissolution. The dissolution rate is a function of the strain along the surface. The problem is formulated for an elastic body containing a single or a couple of pits. Low-frequency cyclic loading is considered. Numerical solution is proposed. The behaviours of a growing crack and of two competing cracks are described. Stages of incubation, blunting and steady-state growth characterise a single crack evolution. The steady-state growth rate is found independent of the initial geometry. Stages of independent growth, interactive growth and arrest of one crack characterise the evolution of two competing cracks. The lengths of the arrested cracks are presented as functions of the ratio between the pit depths for a series of different distances between the pits.
| Original language | English |
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| Title of host publication | Proceedings of Jubilee Scientific Conference, vol. 6 – Mechanics |
| Editors | S Pamukchiev |
| Place of Publication | Sofia, Bulgaria |
| Publisher | University of Architecture, Civil Engineering and Geodesy |
| Pages | 5-11 |
| Number of pages | 7 |
| Publication status | Published - 20 Nov 2002 |
| Event | Conference on the occasion of the 60th anniversary of the University of Architecture, Civil Engineering and Geodesy - Sofia, Bulgaria Duration: 20 Nov 2002 → 23 Nov 2002 |
Conference
| Conference | Conference on the occasion of the 60th anniversary of the University of Architecture, Civil Engineering and Geodesy |
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| City | Sofia, Bulgaria |
| Period | 20/11/02 → 23/11/02 |
Keywords
- Corrosion pitting
- Fatigue corrosion cracking
- Surface evolution