Experimental study on durability fracture behavior of china-made car rear axle based on enhancement roads
MEN Yu-zhuo1 , YU Hai-bo2 , HUO Na2
1. School of Mechatronics Engineering, Changchun Institute of Technology, Changchun 130012, China;2. China FAW Co., Ltd. R&D Center, Changchun 130011, China
Abstract： In order to study the rear axle fracture problem of a China-made car appearing in the reliability test stage on the enhancement roads of an automotive proving ground, the strain loading spectrum near the rear axle fracture location is collected, the 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 of the fracture location, the impact of mean stress on fatigue damage is corrected according to the Manson-Coffin model, and using the INFIELD software to calculate the fatigue damage of the rear axle fracture. The electromagnetic vibrators are used to sweep the vibration modal frequencies of the rear axle and body, to identify the relationship between the vibration frequency of the rear axle and the excitation frequency of the enhancement roads and the vibration frequency of the body. The test results show that the rear axle fatigue damage mainly concentrates on the washboard road, and when the forced vibration excitation frequency of the washboard road 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.
门玉琢;于海波;霍 娜. 国产轿车后轴强化路耐久性断裂试验研究[J]. , 2012, 31(24): 115-118.
MEN Yu-zhuo; YU Hai-bo;HUO Na. Experimental study on durability fracture behavior of china-made car rear axle based on enhancement roads. , 2012, 31(24): 115-118.
2012, Vol. 31 
