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- Title
Crack‐like effectiveness of some discontinuities in AA2024.
- Authors
Molent, Loris; Fox, Matthew R.
- Abstract
Maintaining aircraft airworthiness to ensure the fleet's safe operation and maintain its readiness is critically dependent on accurate modelling and reliable predictions of fatigue crack growth. In this process, a knowledge of the representative initial discontinuity sizes that cause fatigue crack nucleation and early growth in aircraft is essential. Here the effective pre‐crack size of aluminum alloy 2024, from samples of aircraft production material and tested under aircraft spectra, are considered. Highlights: The equivalent crack‐like size of nucleating discontinuities in AA2024 have been derived from many different full‐scale and coupon level fatigue tests using representative in‐service flight loading.The distribution of the crack‐like sizes was shown to conform to a log‐normal.
- Subjects
MATERIALS testing; DISCONTINUOUS precipitation; ALUMINUM alloys; FATIGUE crack growth; FATIGUE testing machines; FATIGUE cracks
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2023, Vol 46, Issue 12, p4498
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.14145