Evaluation of the C* Model for Addressing Short Fatigue Crack Growth
Abstract
The C* model has been proposed to account for the breakdown of K-similitude which occurs for short cracks. The model is based on the concept that crack growth rate is dependent not only on the stress intensity factor range, but also on crack length. This report evaluates the C* model using experimental data from the open literature. For comparison, two other models, the El Haddad model and the FASTRAN model, were also evaluated for their capability in dealing with the same problem. The objective of the evaluation was to assess the performance of the C* model compared with the other two models in treating short and long crack growth in a unified manner, and to illustrate their merits and shortcomings. For the cases tested, the C* model was found to be ineffective in resolving the issue of breakdown of similitude for short cracks, and was of less practical use than the other models.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2008
- Accession Number
- ADA491888
Entities
People
- K. F. Walker
- Wenyi Hu
Organizations
- Defence Science and Technology Group