Assessment of crack tip plastic zone size and shape and its influence on crack tip shielding
- Submitting institution
-
University of Plymouth
- Unit of assessment
- 12 - Engineering
- Output identifier
- 115
- Type
- D - Journal article
- DOI
-
10.1111/ffe.12436
- Title of journal
- Fatigue & Fracture of Engineering Materials & Structures
- Article number
- -
- First page
- 969
- Volume
- 39
- Issue
- 8
- ISSN
- 8756-758X
- Open access status
- Out of scope for open access requirements
- Month of publication
- -
- Year of publication
- 2016
- URL
-
-
- Supplementary information
-
-
- Request cross-referral to
- -
- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
- -
- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
-
4
- Research group(s)
-
-
- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- Crack tip stress and strain fields provide the basis of the Irwin stress intensity factor and its incorporation into the Paris crack growth rate relationship. Well-established elastic field models (Westergaard and Williams) give inaccurate size and shape for the important crack tip plastic zone. This paper demonstrates that significantly improved predictions are possible using the innovative Christopher-James-Patterson (CJP) model of crack tip fields. A novel technique, based on digital image correlation, is applied in conjunction with the model to compare the predicted size and shape with experimentally found parameters. Data show that the CJP model outperforms both Westergaard and Williams.
- Author contribution statement
- -
- Non-English
- No
- English abstract
- -
