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Evaluation of fatigue life for titanium alloy TC4 under variable amplitude multiaxial loading |
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| Authors: | Z.‐R. Wu X.‐T. Hu Z. X. Li Y.‐D. Song |
| Affiliation: | 1. Department of Engineering Mechanics, Southeast University, Nanjing, Jiangsu, China;2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China;3. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China |
| Abstract: | Fatigue tests under variable amplitude multiaxial loading were conducted on titanium alloy TC4 tubular specimens. A method to estimate the fatigue life under variable amplitude multiaxial loading has been proposed. Multiaxial fatigue parameter based on Wu–Hu–Song approach and rainflow cycle counting and Miner–Palmgren rule were applied in this method. The capability of fatigue life prediction for the proposed method was checked against the test data of TC4 alloy under variable amplitude multiaxial loading. The prediction results are all within a factor of two scatter band of the test results. |
| Keywords: | critical plane approach life prediction multiaxial fatigue non‐proportional loading variable amplitude loading |
