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| Transmission Housing Low-cycle Fatigue Optimization Design |
| Received:May 29, 2021 Revised:July 10, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.10.019 |
| KeyWord:low-cycle fatigue finite element method Coffin-Manson model plastic strain |
| Author | Institution |
| LUO Yi-jian |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| TANG Tian-bao |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| PENG Guo-min |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| WU Cai-yong |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| YU Chun-xiang |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| QIN Yu-lin |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
| HE Wei-kang |
Zhejiang Geely Powertrain Research Institute, Hangzhou , China |
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| Abstract: |
| This paper aims to find out the root cause of the failure of transmission housing park lock test issue and optimize the low cycle fatigue life of transmission housing. Firstly, checked the housing chemical component and cast quality, excluded the material and casting quality issue. And then analyzed the housing strain is up to 0.95%, confirmed the root cause of the housing crack is big strain amplitude. Finally, according to the housing system deformation and contact area results of finite element method model, proposed a proposal of shaft modification, confirmed the Coffin-Manson model according to housing material low-cycle fatigue parameters, predicted the fatigue life of the housing. The shaft sharp modification proposal decreased the strain to 0.40%, plastic strain occupancy rate decreased from 42% to 5%. The predicted fatigue life of the housing increased from 175 cycles to 7980 cycles, which can fulfill the 1000 cycles requirement, and the physical samples had passed the test. The Coffin-Manson model parameters used in this paper can predict the low cycle fatigue life of transmission housing accurately, the shaft modification proposal can solve local big strain failure issue effectively, which is significance to engineering. |
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