Effect of stress ratio on effective stress range ratio and crack growth in 6061-T6 Al-alloy |
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| Authors: | Raghuvir Kumar and S. B. L. Garg |
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| Affiliation: | Department of Mechanical Engineering, Motilal Nehru Regional Engineering College, Allahabad 211004, India |
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| Abstract: | Crack closure experiments using a COD gauge were performed on 6061-T6 Al-alloy, for various stress ratios. Experimental results show that for a given stress ratio, R, the crack length increases up to 1 mm after which it is stabilized. On the basis of the experimental results a model for effective stress range ratio U, which was found to be a function of stress ratio R, was developed. This model was fitted to existing constant amplitude crack propagation data for the 6061-T6 Al-alloy. |
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