| Experimental study on durability fracture behavior and vibration modal sweep for vehicle rear axle |
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| 作者姓名： | 门玉琢 于海波 霍娜 |
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| 作者单位： | School of Mechatronics Engineering, Changchun Institute of Technology, Changchun 130012, China;China FAW Company Limited R&D Center, Changchun 130011, China;China FAW Company Limited R&D Center, Changchun 130011, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(51008034); Development Plan Project of Jilin Provincial Science and Technology Department (201201135); Chunmiao Foundation of Jilin Provincial Education Department (2013299). |
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| 摘 要： | In order to study the fatigue fracture behavior of the rear axle of certain China-made car, the strain loading spectrum near the rear axle fracture location is collected, the modified Neuber rule and the cyclic stress-strain hysteresis loop curve equation are used to convert the nominal strain history into the local stress-strain response. The impact of mean stress on fatigue damage is corrected according to the Manson-Coffin model, and programming calculation of the fatigue damage of the fracture crack is conducted in the INFIELD software, the electromagnetic vibrators are used to sweep the vibration modal frequencies of the rear axle and car body. The enhancement test and frequency sweep results show that the rear axle fatigue damage mainly concentrates on the washboard road, and when the forced vibration excitation frequency is 24.07Hz, the vibration modal frequency of the rear axle is close to the excitation frequency of the washboard road, leading to resonance and making the rear axle subjected to large strain and fatigue damage, and then vibration fatigue fracture due to high stress concentration.
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| 关 键 词： | fatigue damage durability fracture vibration sweep loading spectrum forced vibration |
| 收稿时间： | 2012/4/19 0:00:00 |
Experimental study on durability fracture behavior and vibration modal sweep for vehicle rear axle |
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| MEN Yu-zhuo,YU Hai-bo and HUO Na.Experimental study on durability fracture behavior and vibration modal sweep for vehicle rear axle[J].Journal of Beijing Institute of Technology,2013,22(2):207-212. |
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| Authors: | MEN Yu-zhuo YU Hai-bo and HUO Na |
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| Affiliation: | 1. School of Mechatronics Engineering, Changchun Institute of Technology, Changchun 130012, China
2. China FAW Company Limited R&D Center, Changchun 130011, China |
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| Abstract: | In order to study the fatigue fracture behavior of the rear axle of certain China-made car, the strain loading spectrum near the rear axle fracture location is collected, the modified Neuber rule and the cyclic stress-strain hysteresis loop curve equation are used to convert the nominal strain history into the local stress-strain response. The impact of mean stress on fatigue damage is corrected according to the Manson-Coffin model, and programming calculation of the fatigue damage of the fracture crack is conducted in the INFIELD software, the electromagnetic vibrators are used to sweep the vibration modal frequencies of the rear axle and car body. The enhancement test and frequency sweep results show that the rear axle fatigue damage mainly concentrates on the washboard road, and when the forced vibration excitation frequency is 24.07.Hz, the vibration modal frequency of the rear axle is close to the excitation frequency of the washboard road, leading to resonance and making the rear axle subjected to large strain and fatigue damage, and then vibration fatigue fracture due to high stress concentration. |
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| Keywords: | fatigue damage durability fracture vibration sweep loading spectrum forced vibration |
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