Abstract
A stress-based approach is used to evaluate the role of notch sharpness on effective toughness of S355J2 + N steel samples. A notch corrected constraint method based on a J-Q approach is proposed for the first time. The approach is calibrated using experimental fracture data of pre-cracked and notched SEN(B) samples and validated using notched C(T) data from open literature for the same material. A two-parameter Weibull model is used to describe the probability of failure to incorporate confidence levels into the analysis. The methodology shows to be a promising method for assessment of non-sharp defects where benefit may be taken from resolving non-sharp defects acuity.
| Original language | English |
|---|---|
| Article number | 109574 |
| Journal | Engineering Fracture Mechanics |
| Volume | 292 |
| DOIs | |
| Publication status | Published - 15 Nov 2023 |
Funding
Dr. N.O Larrosa would like to acknowledge the funding provided by the UK Engineering and Physical Sciences Research Council under grant no. EP/S012362/1 and EP/R513179/1. The lead author would like to thank the Advanced Computing Research Centre (ACRC) at the University of Bristol (www.bristol.ac.uk/acrc) for providing access to the Blue Crystal 4 & Blue Pebble GPU clusters for performing numerical simulations. The authors would also like to thank Prof Bob Ainsworth and Dr Anthony Horn (Jacobs) for their support and feedback, and Prof Sergio Cicero (University of Cantabria, Spain) for providing the additional data assessed as part of the validation.
| Funders | Funder number |
|---|---|
| Advanced Computing Research Centre | |
| Engineering and Physical Sciences Research Council | EP/S012362/1, EP/R513179/1 |
| University of Bristol |
Keywords
- Constraint
- Elastic-plastic fracture mechanics
- Fracture toughness
- J-integral
- Non-sharp defects
- Notch effects
- Q-factor