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| Determination of Detail Fatigue Rating of structure under Multiaxial Loading |
| Received:January 15, 2018 Revised:March 15, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.03.019 |
| KeyWord:detail fatigue rating two-point method multiaxial fatigue test multiaxial high-cycle fatigue |
| Author | Institution |
| WANG Xiao-wei |
College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing , China |
| SHANG De-guang |
College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing , China |
| XIONG Jian |
College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing , China |
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| Abstract: |
| Objective To propose a method for determining Detail Fatigue Rating (DFR) of structure under multiaxial loading. Methods Based on the two-point method for uniaxial loading (DFR), the high-cycle multiaxial fatigue test model was adopted to obtainthe equivalent stress (equivalent tensile stress or equivalent shearing strength). The equivalent stress was transferred to the equivalent tension stress under R=0.06 through the Goodman equation, to determine the detail fatigue rating under multiaxial loading. The equivalent stress was determined by employing a multiaxial high-cycle fatigue model. According to the uniaxial fatigue tests for 7075-T651 aluminum alloy under R=0.06, the DFR for uniaxial loading was determined. Then, the multiaxial fatigue tests were conducted, including the proportional and non-proportional loadings. Results From the comparisons between the predicted DFR for multiaxial loading and the experimental DFR for uniaixal loading, the absolute value of the relative errors was about 10%. Conclusion The proposed method, for the determination of the DFR under multiaxial, has a good predictive capability. |
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