J-integral in the description of fatigue crack growth rate induced by different ratios of torsion to bending loading in AlCu4Mg1
✍ Scribed by D. Rozumek; E. Macha
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 304 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0933-5137
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✦ Synopsis
Abstract
The paper presents the results of tests on fatigue crack growth under proportional torsion with bending in AlCu4Mg1 aluminium alloy. Specimens with rectangular cross‐sections and stress concentrator in the form of external one‐sided sharp notch were used. The tests were performed under the different ratios of torsion to bending moments. The results of the experimental tests have been described by a nonlinear formula based on ΔJ‐integral range. The tests have shown that the change of ratio of torsion to bending moments from 0.58 to 1.73 caused an increase in crack growth rate. It has been shown that at the constant loading and the change of stress ratio (R) from ‐ 1 to 0, the fatigue crack growth rate also increases.