Research on Dynamic Fatigue Test of Vehicle Composite Leaf Spring Under Different Working Conditions
ZHANG Lei1,2, ZHUANG Yi3, LI Shanshan1,2, TANG Yujing4, LI Jing1,2, LUO Xin1,2
1 China Textile Academy, Beijing 100025, China 2 State Key Laboratory of Biobased Fiber Manufacture Technology, Beijing 100025, China 3 Science & Technology Department, China Petrochemical Corporation, Beijing 100728, China 4 SINOPEC, Beijing Research Institute of Chemical Industry, Beijing 100013, China
Abstract: In order to speed up the application of composite leaf spring in automobile lightweight process, the performance test of anisotropic composite leaf spring is particularly important, and the dynamic fatigue performance directly reflects the reliability of composite leaf spring in practical use. At present, the fatigue performance test of composite leaf spring basically stays in the vertical fatigue, and there are few reports on the test research of braking and steering dynamic fatigue that often occurs in the actual use process. In this work, the vertical, braking and turning fatigue test methods are designed for the composite leaf spring under different working conditions. The stiffness, maximum bearing capacity, braking condition, steering condition and different dynamic fatigue are studied by finite element analysis method. At the same time, the reliability of the finite element analysis model is verified by the static load stiffness, maximum bearing capacity and vertical dynamic fatigue test of the composite leaf spring. Finally, limiting the fatigue life and the allowable stress value of the composite leaf spring, the vertical fatigue limit load of the leaf spring is 1.5 times of the vertical full load. The braking fatigue limit load is 1.5 times full load in vertical direction and 1.5 times full load in length direction. Steering fatigue limit load is full load in vertical direction and 0.8 times full load in lateral direction.
张雷, 庄毅, 李姗姗, 唐毓婧, 李静, 罗欣. 不同工况下车用复合材料板簧的动态疲劳测试研究[J]. 材料导报, 2021, 35(z2): 583-588.
ZHANG Lei, ZHUANG Yi, LI Shanshan, TANG Yujing, LI Jing, LUO Xin. Research on Dynamic Fatigue Test of Vehicle Composite Leaf Spring Under Different Working Conditions. Materials Reports, 2021, 35(z2): 583-588.