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- Title
Low-cost J-R curve estimation based on CVN upper shelf energy.
- Authors
Wallin, K.
- Abstract
J-R curve testing is costly and difficult. The results may also sometimes be unreliable.For less demanding structures, J-R curve testing is therefore not practical. The onlyway to introduce tearing instability analysis for such cases is to estimate the J-R curvesindirectly from some simpler test. The Charpy-V notch test provides information aboutthe energy needed to fracture a small specimen in half. On the upper shelf this energyrelates to ductile fracture resistance and it is possible to correlate it to the J-R curve.Here, 112 multispecimen J-R curves from a wide variety of materials were analysedand a simple power-law-based description of the J-R curves was correlated to theCVNUS energy. This new correlation corresponds essentially to a 5% lower bound andconforms well with the earlier correlations, regardless of the definition of the ductilefracture toughness parameter.
- Subjects
ESTIMATION theory; NOTCHED bar testing
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2001, Vol 24, Issue 8, p537
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1046/j.1460-2695.2001.00405.x