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| Analysis of Degradation Trend in Step Stress Accelerated Aging Test of Torsion Bar |
| Received:March 28, 2025 Revised:May 14, 2025 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2025.05.004 |
| KeyWord:step stress accelerated aging torsion bar relaxation rate torque equivalent degradation temperature conversion |
| Author | Institution |
| NI Ruizheng |
Aerospace Science and Technology Defense Technology Research and Experiment Center, Beijing , China |
| XU Ruyuan |
Aerospace Science and Technology Defense Technology Research and Experiment Center, Beijing , China |
| ZHAO Pengfei |
Aerospace Science and Technology Defense Technology Research and Experiment Center, Beijing , China |
| ZHANG Shengpeng |
Aerospace Science and Technology Defense Technology Research and Experiment Center, Beijing , China;Beihang University, Beijing , China |
| LI Hongmin |
Aerospace Science and Technology Defense Technology Research and Experiment Center, Beijing , China;Beihang University, Beijing , China |
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| Abstract: |
| The work aims to quickly evaluate the degradation process of metal torsion bars. An equivalent conversion method was proposed for measurement results under different temperature stresses. The degradation rate under different temperature stresses was calculated and converted to the equivalent degradation trend at the same temperature. The degradation result at room temperature was obtained by converting the temperature equivalent results to get the degradation rate of the torsion bar at room temperature. The degradation trend of the two torsion bars was basically consistent, and the data fitting results were ideal. The degradation trend of the two torsion bars was –2.06×10–4 N.m/h and –9.02×10–5 N.m/h respectively, which were basically consistent with the constant stress degradation result of –4.752×10–4 N.m/h. The step stress degradation calculation method proposed for torsion bars is accurate and effective. |
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