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.

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%.

Experimental and Numerical Investigation of Dynamic Impact on Universal Breakaway Steel Post

2019 ◽  
Author(s):  
Javad Mehrmashhadi ◽  
Mojdeh A. Pajouh ◽  
John D. Reid
Keyword(s):  
Experimental Data ◽  
Numerical Modeling ◽  
Numerical Model ◽  
Dynamic Impact ◽  
Roadside Safety ◽  
Impact Performance ◽  
Component Testing ◽  
Long Span ◽  
Finite Element Package ◽  
The Impact

Abstract A closed guardrail system, known as “bullnose” guardrail system, was previously developed to prevent out-of-control vehicles from falling into the elephant trap. The bullnose guardrail system originally used Controlled Release Terminal (CRT) wood posts to aid in the energy absorption of the system. However, the use of CRT had several drawbacks such as grading and the need for regular inspections. Universal Breakaway Steel Post (UBSP) was then developed by the researchers at Midwest Roadside Safety Facility as a surrogate for CRT. In this study, the impact performance of UBSP on the weak-axis and strong-axis was studied through numerical modeling and component testing (bogie testing). A numerical model was developed using an advanced finite element package LS-DYNA to simulate the impact on UBSP. The numerical results were compared to experimental data. Further research on soil models was recommended. The numerical model will be used to investigate other applications for UBSP such as the Midwest Guardrail System (MGS) long span system, guardrail end terminal designs, or crash cushions.

scholarly journals Influence of Material on Wheelchair Vibrations

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 127
Author(s):  
Takeshi Waga ◽  
Soichiro Ura ◽  
Masahito Nagamori ◽  
Hisashi Uchiyama ◽  
Akira Shionoya
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
Young’S Modulus ◽  
Vibration Frequency ◽  
Weight Reduction ◽  
Young's Modulus ◽  
Specific Weight ◽  
Wheelchair Sports ◽  
The Difference

Wheelchair sports have a tendency to depend on the performance of wheelchairs, and the weight reduction of wheelchairs made of various alloys has helped improve the performance of players. Some players have mentioned, however, that the operability and riding comfort of competition wheelchair have been affected by changing the wheelchair materials; stiffness and weight are considered to be related to operability and riding comfort. In this experiment, we installed some weights on the center of the mass of a competitive wheelchair made of magnesium alloy to be the same mass of a wheelchair made of aluminum alloy; vibrations that occurred on both wheelchairs while driving were measured and compared. The experiment was performed using 3-axis sensors. This experiment showed that the vibration frequency of the wheelchair made of magnesium alloy was different from that made of aluminum alloy. This result was thought to be influenced by the difference in Young’s modulus or the specific weight.

Magnesium Alloy Material Substitution Redesign Method for Wheels of Electric Bicycle

2009 ◽  
Vol 69-70 ◽  
pp. 631-635
Author(s):  
Bai Song Pan ◽  
H.L. Gong ◽  
Ting Hong Peng ◽  
Miao Zhang
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
High Ratio ◽  
Load Test ◽  
Static Load Test ◽  
Material Substitution ◽  
Alloy Wheel ◽  
Alloy Material ◽  
Bending Fatigue Test ◽  
Electric Bicycle

For the excellent characters such as lightweight, high ratio-strength, high rigidity and reuse, magnesium alloy is used widely in vehicle lightweight redesign. Selecting AM60B as material, the process of magnesium alloy material substitution redesign for wheels of electric bicycle is advanced. The structure of aluminum alloy wheel is chosen as prototype structure for magnesium alloy wheel according to the similarity between the properties of aluminum alloy and magnesium alloy. The structure redesign optimized parametric model is put forward by the stimulation analysis of static load test and dynamic bending fatigue test. The inspection of samples shows that the structure redesign is feasible, and the target of wheels lightweight redesign is achieved.

Study on the AZ31B Magnesium Alloy in the Application on High-Speed Trains

2012 ◽  
Vol 535-537 ◽  
pp. 875-879 ◽  
Author(s):  
Jia Zhen Liu ◽  
Yan Hui Zhao ◽  
Lei Song ◽  
Zhong Xia Xiang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
High Speed ◽  
Equivalent Stress ◽  
Strength Analysis ◽  
Az31b Magnesium Alloy ◽  
High Speed Trains ◽  
6063 Aluminum Alloy ◽  
The Impact

6063 aluminum alloys are used as the luggage rack’s material on high-speed trains recently. The study on the AZ31B magnesium alloy is aimed to demonstrate the feasibility of the magnesium alloy’s application as the material of the luggage rack on high-speed trains. First, the mechanical properties of the AZ31B magnesium was obtained after a series of experimental tests on basic mechanical properties of the AZ31B magnesium alloy. The results show that the strength of the magnesium alloy is 1.25 times of the 6063 aluminum alloy and the impact toughness of the AZ31B magnesium alloy is twice as much as the 6063 aluminum alloy. Second, the stress distribution and the maximum value of the equivalent stress in given loading conditions was obtained by finite element strength analysis on the structure of the aluminum alloy luggage rack on high-speed trains. And the FE analysis results indicate that if the AZ31B magnesium alloy is used as the material of the luggage rack instead of the 6063 aluminum alloy, it will have a weight loss of the luggage rack for approximately 33%. In addition, the application of AZ31B magnesium alloy has more advantages in energy-saving, environmental protection and safety control.

Influence of Material Anisotropy on Long Glass Fiber Reinforced Thermoplastics Composite Wheel: Dynamic Impact Simulation

2015 ◽  
Author(s):  
X. F. Wan ◽  
Y. Pan ◽  
X. D. Liu ◽  
Y. C. Shan
Keyword(s):  
Glass Fiber ◽  
High Performance ◽  
Lightweight Design ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Dynamic Impact ◽  
Anisotropic Properties ◽  
Impact Simulation ◽  
Long Glass Fiber ◽  
The Impact

As the unsprung components of vehicle, lightweight wheel plays a significance role for handling stability and riding comfort. Besides, the energy saving effect of lightweight design for wheel is 1.2 to 1.3 times as much as that of components without rotating. Therefore, the lightweight design of wheel is an inevitable development tendency in future. For the wheel composed by long-fiber reinforced composites through injection process, the difference of fiber distribution and orientation at various positions leads to anisotropy on the macro performance. This paper explores a new type of high-performance thermoplastic composites (LGFTs) material reinforced by long glass fiber for lightweight wheel design. The dynamic impact simulations on the LGFT wheel with isotropic properties and anisotropic properties are conducted according to the ISO procedure, using the software Moldflow, Digimat, and Abaqus. The comparison of the simulation results demonstrates that the anisotropic properties of material have a significant effect on the impact characteristics of the wheel. The research in this paper is beneficial to improve the accuracy of the impact simulation on LGFT wheel, and also provides foundation for further lightweight design of the wheel.

DYNAMIC IMPACT RESISTANCE OF COMPOSITE SANDWICH PANELS WITH 3-D PRINTED POLYMER SYNTACTIC FOAM CORES

2021 ◽  
Author(s):  
H. R. TEWANI ◽  
DILEEP BONTHU ◽  
H. S. BHARATH ◽  
MRITYUNJAY DODDAMANI ◽  
P. PRABHAKAR
Keyword(s):  
Impact Resistance ◽  
Syntactic Foam ◽  
Sandwich Panels ◽  
Syntactic Foams ◽  
Dynamic Impact ◽  
Impact Performance ◽  
Composite Sandwich Panels ◽  
Composite Sandwich ◽  
Back Face ◽  
The Impact

Polymer-based syntactic foams find use in the marine industry as primary structural materials due to their inherent lightweight nature and enhanced mechanical properties relative to pure HDPE. 3-D printing these materials circumvents the use of joining assemblies, enabling the production of complex shapes as standalone structures. Although the quasi-static response of these 3D printed foams has been well studied independently in recent years, their dynamic impact resistance and tolerance as potential core material for sandwich panels have not been the focus. Moreover, 3D printing is known to impart directionality in the printed syntactic foams, which may introduce failure mechanisms typically not observed in molded foams. It is therefore important to investigate the mechanics of 3-D printed syntactic foam core composite sandwich structures under impact loading and characterize their failure mechanisms for establishing dynamic impact resistance. To this end, 3-D printed syntactic foams have been developed using rasters of High-Density Polyethylene (HDPE) and Glass MicroBalloon (GMB) fillers by adopting the Fused Raster Fabrication (FFF) technique. The current study is performed to assess the impact performance of these composite foam cores based on the volume fraction of fillers and print orientation. The weight percentage of GMB fillers in printed specimens ranges from 0% to 60% in increments of 20%. This study presents the impact response of these composite sandwich panels at different energy levels, in compliance with ASTM D7136/D7136M - 20. Observations suggest that an increase in GMB % in HDPE matrix improves the impact performance in terms of the peak load of the material, but the failure behavior becomes brittle to an extent. Observing the failed specimens under a Micro-CT scanner captures the failure morphologies and helps characterize failure processes during impact. It is noticed that core materials with higher GMB content are prone to individual raster breakage and delamination at the back face, in addition to debonding between individual rasters. Specimens printed along the longer dimension (y-direction) impart more warping in the final sandwich structures than that of specimens printed along the shorter dimension (x-direction). Therefore, they are more susceptible to delamination at the back face. Addition of GMB fillers mitigate the tendency of the sandwich panels to warp.

Dissimilar Friction Stir Spot Welding without Key Hole between AZ31B Magnesium Alloy and 5052 Aluminum Alloy

2013 ◽  
Vol 652-654 ◽  
pp. 2320-2325 ◽  
Author(s):  
Xi Jing Wang ◽  
Ting Kai Guo ◽  
Zhong Ke Zhang ◽  
Pei Chung Wang ◽  
Ji Peng Shi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
Spot Welding ◽  
Welding Process ◽  
Friction Stir Spot Welding ◽  
Tensile Fracture ◽  
Az31b Magnesium Alloy ◽  
Friction Stir ◽  
Welding Joint ◽  
The Impact

To study the impact of the welding process parameters on the spot weld surface molding, mechanical performance and the stir zone microstructure, we use friction stir spot welding without keyhole method which designed and developed by ourselves to carry on the lap welding between 1mm sheet of AZ31B magnesium alloy and 3mm sheet of 5052 aluminum alloy with magnesium on top and aluminum bottom. The result of the orthogonal test shows that the shoulder friction time have a greater impact on the forming of the surface of the welding joint; When the rotating speed of 1000 r/min, shoulder friction time of 4s, pin length of 3.5mm, the tensile shearing force of the welded joint achieves its maximum value of 2.46 KN.Through observating the microstructure of the welding joint’s section stirring zone, we found the typical joint microstructure of Dissimilar metal. Through analyzing the microstructure of the tensile fracture, we found that fracture was cleavage fracture.We also found the fracture mechanism of the welding joint was cleavage fracture in microcosm but brittle fracture macrocosm.

Numerical Simulation of Aluminum Alloy Wheel 13° Impact Test Based on Abaqus

2012 ◽  
Vol 215-216 ◽  
pp. 1191-1196 ◽  
Author(s):  
Xiao Ming Yuan ◽  
Li Jie Zhang ◽  
Xin Ying Chen ◽  
Bing Du ◽  
Bao Hua Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Finite Element Model ◽  
Impact Test ◽  
Equivalent Plastic Strain ◽  
Element Model ◽  
Experimental Result ◽  
Alloy Wheel ◽  
The Impact ◽  
The Finite Element Model

In order to predict the result of impact test in the design phase and reduce the experimental times, which can save cost and shorten development cycle, a finite element model of aluminum alloy wheel 13-degree impact test is established based on Abaqus. All mechanical parts such as the standard impact block, the assembly of the wheel and the tire, the support and bolts are included in the finite element model. The predicted result of finite element analysis and the experimental result agree very well shows the finite element model is correct. The equivalent plastic strain value was also put forward as fracture criterion for the wheel in the impact test which realizes the transition from the qualitative analysis to the quantitative analysis in the development process of aluminum alloy wheel.

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