Abstract
The Tε* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The Tε* values were obtained directly from the recorded moiré fringes on the fracture specimens with and without MSD. The Tε* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that Tε* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. Tε* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.
Original language | English |
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Pages (from-to) | 147-152 |
Number of pages | 6 |
Journal | Experimental Mechanics |
Volume | 42 |
Issue number | 2 |
DOIs | |
State | Published - Jun 2002 |
Keywords
- Crack linkup
- Fracture mechanics
- Moiré interferometry
- Multiple site damage (MSD)
- Stable crack growth