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Abstract
This study considers surface crack behaviour under periodic thermal loads using weight functions and finite element calculations. A surface and subsurface crack opening mode during the load cycle was observed. The subsurface mode where the crack mouth is closed while the crack tip remains open can be more critical for deeper cracks. Crack face contact is required to obtain the subsurface mode both with finite elements and weight functions. A combination of surface and subsurface weight functions can capture the crack behaviour throughout the load cycle. This behaviour is demonstrated using numerous simulations with periodic thermal loads with different extent and frequency.
Original language | English |
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Article number | 106600 |
Number of pages | 12 |
Journal | Engineering Fracture Mechanics |
Volume | 218 |
Early online date | 5 Aug 2019 |
DOIs | |
Publication status | Published - 1 Sept 2019 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Crack closure
- Stress intensity factor
- Surface flaw
- Thermal fatigue
- Weight function
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Dive into the research topics of 'The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads'. Together they form a unique fingerprint.Projects
- 1 Finished
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FOUND (VYR)
Virkkunen, I. (Principal investigator)
01/02/2018 → 31/01/2019
Project: Other external funding: Other government funding