Modeling and Optimization for Lightweight Design of Aluminum Alloy Wheel Hub

2016 ◽  
Vol 723 ◽  
pp. 322-328
Author(s):  
Wei Pang ◽  
Wei Ping Wang ◽  
Wen Hao Zhang ◽  
Xiao Wang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Ride Comfort ◽  
Lightweight Design ◽  
Negative Influence ◽  
Orthogonal Experimental Design ◽  
Cycle Fatigue ◽  
Multi Objective Optimization ◽  
First Order ◽  
Alloy Wheel

The excessive increase of fatigue life would lead to wheels getting heavy, which has negative influence in fuel economy, safety and ride comfort of the vehicle. In this paper, the fatigue cycle of aluminum alloy wheel equipped in minibus is calculated firstly under bending, radial, random cycle fatigue conditions. According to the distribution of results, the space parameters of structure optimization are determined. The method combined Latin hyper-cube design and orthogonal experimental design was applied to conduct the design of experiment. The fatigue life of the wheel under the experiment schemes are calculated respectively. Response surface multi-objective optimization model of the wheel is established based on fatigue life results. The genetic algorithm is applied to optimize the wheel, which causes the mass of aluminum alloy wheel reduces 13.85% and first order modal value increases 7.6%.

scholarly journals Optimization of Magnesium Alloy Wheel Dynamic Impact Performance

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Xin Jiang ◽  
Hai Liu ◽  
Rui Lyu ◽  
Yoshio Fukushima ◽  
Naoki Kawada ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
Weight Reduction ◽  
Ride Comfort ◽  
Structural Parameters ◽  
Lightweight Design ◽  
Dynamic Impact ◽  
Impact Performance ◽  
Alloy Wheel ◽  
The Impact

Designing lightweight and comfortable automotive vehicles is a primary aim of the industry. Lightweight wheel designs can have a negative effect on the dynamic impact performance of the wheel; therefore, striking a balance between these two factors is a key objective in the design of automotive vehicles. Magnesium alloy wheels were investigated as magnesium alloy has damping performance advantages over some metal materials. Damping test methods were designed to establish the damping performance parameters of the magnesium alloy material. A finite element analysis model of magnesium alloy wheels was established with certain boundary conditions and constraints. The applicability of the model was verified by free modal evaluation of the wheel. Dynamic impact simulation analysis of the designed wheels was carried out, and the dynamic speed responses of magnesium alloy wheels under the impact of a dynamic load on the road surface were obtained. Comparison of the dynamic impact performance of magnesium and aluminum alloy wheels with the same structure showed that the magnesium alloy wheel achieved the target weight reduction of 32.3%; however, the dynamic impact performance was reduced. In order to realize the lightweight design, the dynamic impact performance of the magnesium alloy wheel should not be inferior to that of the aluminum alloy wheel; therefore, the design of the magnesium alloy wheel structure was optimized. The structural design optimization of the magnesium alloy wheel was carried out by defining the structural parameters of the wheel and using the acceleration and shock response of the wheel as the outputs. The optimization of weight reduction and dynamic impact performance of magnesium alloy wheels was achieved. Consequently, the designed magnesium alloy wheel was shown to have improved ride comfort while satisfying wheel structural performance standards and providing lightweight design.

scholarly journals Multi-Objective Lightweight Optimization of Parameterized Suspension Components Based on NSGA-II Algorithm Coupling with Surrogate Model

Machines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 107
Author(s):  
Rongchao Jiang ◽  
Zhenchao Jin ◽  
Dawei Liu ◽  
Dengfeng Wang
Keyword(s):  
Ride Comfort ◽  
Lightweight Design ◽  
Dynamic Performance ◽  
Vehicle Dynamic ◽  
Multi Objective Optimization ◽  
Original Design ◽  
Dynamic Simulations ◽  
Nsga Ii ◽  
Torsion Beam ◽  
Multi Objective

In order to reduce the negative effect of lightweighting of suspension components on vehicle dynamic performance, the control arm and torsion beam widely used in front and rear suspensions were taken as research objects for studying the lightweight design method of suspension components. Mesh morphing technology was employed to define design variables. Meanwhile, the rigid–flexible coupling vehicle model with flexible control arm and torsion beam was built for vehicle dynamic simulations. The total weight of control arm and torsion beam was taken as optimization objective, as well as ride comfort and handling stability performance indexes. In addition, the fatigue life, stiffness, and modal frequency of control arm and torsion beam were taken as the constraints. Then, Kriging model and NSGA-II were adopted to perform the multi-objective optimization of control arm and torsion beam for determining the lightweight scheme. By comparing the optimized and original design, it indicates that the weight of the optimized control arm and torsion beam are reduced 0.505 kg and 1.189 kg, respectively, while structural performance and vehicle performance satisfy the design requirement. The proposed multi-objective optimization method achieves a remarkable mass reduction, and proves to be feasible and effective for lightweight design of suspension components.

Cumulative Damage and Effect of Mean Strain in Low-Cycle Fatigue of a 2024-T351 Aluminum Alloy

1966 ◽  
Vol 88 (4) ◽  
pp. 801-810 ◽  
Author(s):  
Kiyotsugu Ohji ◽  
W. R. Miller ◽  
Joseph Marin
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Cumulative Damage ◽  
Strain Condition ◽  
Cycle Fatigue ◽  
History Of ◽  
Mean Strain ◽  
Strain Cycling ◽  
Cycling Behavior

By assuming a linear cumulative damage hypothesis for strain cycling, theories are developed in this paper for fatigue life under varying strain amplitude, residual ductility after a given history of strain cyling, and life under mean strain condition. These predictions are based on uniaxial completely reversed cycling behavior. The expressions obtained were compared with the experimental results on 2024-T351 aluminum alloy as well as other data available in the literature. The agreements between theories and experiments were found to be satisfactory.

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