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- Title
Prediction of Shape Change for Fatigue Crack in a Round Bar Using Three-Parameter Growth Circles.
- Authors
Yang, Yali; Chu, Seokjae; Chen, Hao
- Abstract
Featured Application: Life prediction for engineering materials. The conventional method for predicting the shape change of a surface crack in a round bar simply utilizes the Paris-Erdogan law with the least squares method using a certain shape assumption with excessive constraints. In this paper, a three-parameter model for a round bar subjected to tension is developed with fewer shape assumption restraints by employing a fatigue crack growth circles method. The equivalent stress intensity factor Δ K e based on both stress intensity factors along the current and new crack front is used to reduce the total number of increments. The results show that the proposed method has a good convergence speed and accurate prediction of crack shapes. The present method is validated by comparing the solution with other simulation solutions and experimental data.
- Subjects
FATIGUE cracks; FATIGUE crack growth; SURFACE cracks; MATERIALS; LEAST squares; GEOMETRIC shapes
- Publication
Applied Sciences (2076-3417), 2019, Vol 9, Issue 9, p1751
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app9091751