Abstract
It is reasonable to apply crack closure concepts, i.e. roughness-induced crack closure, to understand the crack propagation behavior under mixed mode loading conditions. In this paper, the characteristics of fatigue crack propagation under mixed-mode loading is studied using the concept of roughness-induced crack closure, and a model of the variation of the crack opening ratio is proposed based on multi-variable statistics. In addition, fracture surfaces are examined by C-scan and classified into four stages to quantify the effect of crack closure. The roughness parameter based on the highest intensity reveals the effect of roughness-induced crack closure on the fatigue crack propagation.
Original language | English |
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Pages (from-to) | 264-269 |
Number of pages | 6 |
Journal | Materials Transactions |
Volume | 53 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- C-scan
- Crack opening ratio
- Fatigue crack
- Mixed-mode
- Roughness-induced crack closure
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering