Method for measuring radial fatigue life of forged aluminum alloy hub
Patent Information
- Application Number
- CN202511311140.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2025-10-17
AI Technical Summary
锻造铝合金车轮径向疲劳试验需在专业径向疲劳机上运转，测试周期大，试验成本高
本发明的优点及积极效果：通过在有限元模拟软件中建立径向疲劳模型，不考虑其他外力的影响，根据轮毂径向疲劳寿命测试原理，只考虑轮毂径向载荷对轮毂的作用力。在疲劳累计损伤的基础上，确定轮毂在径向载荷下的平均应力S、径向载荷作用下发生的疲劳损伤D确定与轮毂径向疲劳寿命N的关系。高效准确的计算出锻造铝合金轮毂径向疲劳寿命，提高对轮毂径向试验中对疲劳寿命的测定，为锻造铝合金轮毂径向试验实验提供了一种稳定测定疲劳寿命的方法。
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Figure CN120800834A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of automobile wheel hub manufacturing, and particularly relates to a method for determining the radial fatigue life of a forged aluminum alloy wheel hub. BACKGROUND
[0002] Automobile wheel hub is an important component of automobile parts. With the growth of China's automobile parts industry, the wheel hub industry has also gradually grown up. At the same time, the quality problem of the wheel hub has also attracted the attention of the majority of scientific researchers, and the fatigue life of the wheel hub is increased to strengthen the safety of automobile driving. The working condition of the wheel hub is relatively complex, and the stability and reliability will decrease over time, so it is particularly important to predict the fatigue life of the wheel hub under the premise of ensuring the safety performance of the wheel hub. Finite element simulation analysis is carried out on the wheel hub, and its accuracy and simplicity are used as an important analysis method in mechanical calculation, which brings great convenience to the development of the wheel hub industry.
[0003] By numerical prediction of the radial finite element fatigue life of the wheel, the wheel is approximately simulated to bear the force from the radial load in the service process, which directly acts on the wheel hub, and the average stress and whether fatigue damage occurs to the wheel hub in the test process are observed. The radial fatigue test of the forged aluminum alloy wheel needs to be run on a professional radial fatigue machine, the test period is long, and the test cost is high. The present application combines the average stress and fatigue damage to design the relationship between the radial fatigue life of the forged aluminum alloy wheel hub, which can determine the fatigue life of the forged aluminum alloy wheel hub in a short time, greatly improve the efficiency of the radial fatigue test life determination, reduce the test cost, and also provide a high-efficiency and convenient theoretical method for the fatigue life determination of the forged aluminum alloy wheel hub. SUMMARY
[0004] The present application provides a method for determining the radial fatigue life of a forged aluminum alloy wheel hub, which can effectively solve the shortcomings of the prior art.
[0005] The object of the present application is achieved in that it comprises the following steps: (1) The radial fatigue life of the forged aluminum alloy wheel hub is determined without considering the influence of other external forces, only considering the effect of radial load and tire pressure on the wheel hub. In the ANSYS simulation software, the radial fatigue finite element simulation of the forged aluminum alloy wheel hub is established, and the relationship between the radial fatigue life N of the wheel hub and the average stress S and the fatigue damage D is directly designed according to the fatigue damage accumulation theory; (2) According to the radial fatigue life finite element simulation of the wheel hub, the average stress S of the wheel hub under the radial load and the fatigue damage D occurring under the cyclic load are determined to determine the design formula of the radial fatigue life N of the wheel hub: N=2.72193x10 12xexp(-0.09813xS)+0.505185xD -0.99934； (3) The forged aluminum alloy material is 6061.
[0006] According to the method for determining the radial fatigue life of the forged aluminum alloy wheel hub, the radial fatigue life N of the wheel hub can also be obtained from the following table.
[0007] Data table of the fatigue life of the forged aluminum alloy wheel hub and the average stress and the fatigue damage Average stress S / MPa 155.55 151.55 144.25 140.7 135.77 130.795 125.95 120.57 115.8 Fatigue damage D 5.74 x 10 -7 ]] 4.18 x 10 -7 ]] 2.29 x 10 -7 ]] 1.69 x 10 -7 ]] 1.09 x 10 -7 ]] 6.91 x 10 -8 ]] 4.36 x 10 -8 ]] 2.56 x 10 -8 ]] 1.57 x 10 -8 ]]> Fatigue life 1511176 2143639 4121787 5704147 9039671 14488596 23132090 39300212 63405625 Advantages and positive effects of the present application: by establishing a radial fatigue model in the finite element simulation software, without considering the influence of other external forces, according to the wheel hub radial fatigue life test principle, only the radial load of the wheel hub is considered. On the basis of the fatigue cumulative damage, the relationship between the average stress S of the wheel hub under the radial load, the fatigue damage D occurring under the radial load and the radial fatigue life N of the wheel hub is determined. The radial fatigue life of the forged aluminum alloy wheel hub is calculated efficiently and accurately, the determination of the fatigue life in the radial test of the wheel hub is improved, and a stable method for determining the fatigue life is provided for the radial test of the forged aluminum alloy wheel hub. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 The radial fatigue life value prediction model principle diagram of the forged aluminum alloy wheel hub. DETAILED DESCRIPTION
[0009] The method for determining the radial fatigue life of the forged aluminum alloy wheel hub will be further described below in combination with the drawings and specific embodiments.
[0010] Embodiment 1 As Figure 1 As shown in the radial fatigue life value prediction model principle diagram, the parameters set in this embodiment are: the average stress S of the wheel hub is 155.55 MPa, the fatigue damage D is 5.74x10 -7 The design steps of the radial fatigue life determination of the forged aluminum alloy wheel hub are: (1) The radial fatigue life of the forged aluminum alloy wheel is measured without considering the influence of other external forces. A numerical prediction model for the radial fatigue life of the forged aluminum alloy wheel is constructed. A geometric model of the forged aluminum alloy wheel is established to ensure that the model accurately represents the shape and structure of the wheel. The material properties of the wheel, including the elastic modulus, Poisson's ratio, yield strength, and other parameters, are set to facilitate subsequent stress analysis and fatigue calculation. The radial load is defined in terms of its mode of action and magnitude. The wheel geometry model is meshed to ensure sufficient precision for accurate numerical calculations. ANSYS software is run to perform numerical simulation of the radial fatigue life of the wheel. The simulation results are analyzed to assess the average stress distribution and fatigue damage of the wheel under radial load; (2) According to the fatigue damage accumulation theory, the average stress S and fatigue damage D of the wheel under radial load are calculated to determine the radial fatigue life N of the wheel: N = 2.72193 x 10 12 exp(-0.09813 x 155.55) + 0.505185 x (5.74 x 10 -7 ) -0.99934 = 1511176 (1) (3) The calculation of N = 1511176 indicates that the forged aluminum alloy wheel can be cycled at least 1511176 times under an average stress S = 155.55 MPa and a fatigue damage D = 5.74 x 10 -7 .
[0011] Example 2 As Figure 1 shown in the radial fatigue life numerical prediction model diagram, the parameters set in this example are: the average stress S = 135.77 MPa and the fatigue damage D = 1.09 x 10 -7 . The design steps for the radial fatigue life measurement of the forged aluminum alloy wheel are as follows: (1) The radial fatigue life of the forged aluminum alloy wheel is measured without considering the influence of other external forces. A numerical prediction model for the radial fatigue life of the forged aluminum alloy wheel is constructed. A geometric model of the forged aluminum alloy wheel is established to ensure that the model accurately represents the shape and structure of the wheel. The material properties of the wheel, including the elastic modulus, Poisson's ratio, yield strength, and other parameters, are set to facilitate subsequent stress analysis and fatigue calculation. The radial load is defined in terms of its mode of action and magnitude. The wheel geometry model is meshed to ensure sufficient precision for accurate numerical calculations. ANSYS software is run to perform numerical simulation of the radial fatigue life of the wheel. The simulation results are analyzed to assess the average stress distribution and fatigue damage of the wheel under radial load; (2) According to the wheel hub radial fatigue life simulation, the average stress S and fatigue damage D of the wheel hub under radial load, the wheel hub radial fatigue life N is calculated: N = 2.72193 x 10 12 × exp(-0.09813 x 135.77) + 0.505185 x (1.09 x 10 -7 ) -0.99934 = 9039671 (1) (3) N = 9039671 is calculated. It is shown that the forged aluminum alloy wheel hub can be cycled at least 9039671 times when the average stress S = 135.77 MPa and the fatigue damage D = 1.09 x 10 -7 .
[0012] Example 3 As Figure 1 shown in the radial fatigue life numerical value prediction model diagram, the parameters set in this embodiment are: the average stress S = 115.80 MPa and the fatigue damage D = 1.57 x 10 -8 of the wheel hub, and the design steps for determining the radial fatigue life of the forged aluminum alloy wheel hub are: (1) The radial fatigue life of the forged aluminum alloy wheel hub is determined, and other external forces are not considered. The radial fatigue life numerical value prediction model of the forged aluminum alloy wheel hub is constructed. The geometric model of the forged aluminum alloy wheel hub is established to ensure that the model can accurately express the shape and structure of the wheel hub. The material properties of the wheel hub are set, including the elastic modulus, Poisson's ratio, yield strength and other parameters, so as to facilitate subsequent stress analysis and fatigue calculation. The action mode and size of the radial load are defined, and the wheel hub geometric model is meshed to ensure that the model has sufficient fineness for accurate numerical calculation. The ANSYS software is run for numerical simulation and calculation of the radial fatigue life of the wheel hub, and the simulation results are analyzed to evaluate the average stress distribution and fatigue damage of the wheel hub under radial load; (2) According to the wheel hub radial fatigue life simulation, the average stress S and fatigue damage D of the wheel hub under radial load, the wheel hub radial fatigue life N is calculated: N = 2.72193 x 10 12 × exp(-0.09813 x 115.8) + 0.505185 x (1.57 x 10 -8 ) -0.99934 = 63405625 (1) (3) N = 63405625 is calculated. It is shown that the forged aluminum alloy wheel hub can be cycled at least 63405625 times when the average stress S = 115.80 MPa and the fatigue damage D = 1.57 x 10 -8 .
Claims
1. A method for measuring the radial fatigue life of a forged aluminum alloy wheel hub, characterized in that To do this, follow these steps: (1) The radial fatigue life of forged aluminum alloy wheels is determined without considering the influence of other external forces, only the effects of radial load and tire pressure on the wheel are considered. In ANSYS simulation software, a finite element simulation of radial fatigue of forged aluminum alloy wheels is established, and the radial fatigue life of the wheel is directly designed based on the fatigue damage accumulation theory. N and mean stress S , fatigue damage D relationship; (2) According to the finite element simulation of the radial fatigue life of the hub, the average stress of the hub subjected to radial load is S , fatigue damage under cyclic loading D , determine the radial fatigue life of the hub N The design formula is: N =2.72193×10 12 ×exp(-0.09813× S )+0.505185× D -0.99934； (3) The forged aluminum alloy is made of 6061.
2. The method for measuring the radial fatigue life of a forged aluminum alloy wheel hub according to claim 1, characterized in that: Hub radial fatigue life N You can also find it in the following table: Data table of fatigue life, average stress and fatigue damage of forged aluminum alloy wheels