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Selecting wheels of electric bicycle as object, aluminum alloy wheel structure is chosen as research prototype, and the structure of magnesium alloy wheel is optimized by simulation and analysis using FEM analysis tools

Magnesium Alloy Material Substitution Redesign Method for Wheels of Electric Bicycle

ULTRA-PRECISION MACHINING TECHNOLOGIES, (2009): 631-+

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摘要

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 chos...更多

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简介
  • Wheels play an important role when the electric bicycle is running, whether the electric bicycle is in security, stability, balanced status depending on the wheels.
  • Redesign Process of Magnesium Alloy Material Substitution for Wheels of Electric Bicycle
  • Step 4: If the results are not satisfied during the strength checking, the structure parameters of magnesium alloy wheel should be redesigned, return to step 2.
重点内容
  • Wheels play an important role when the electric bicycle is running, whether the electric bicycle is in security, stability, balanced status depending on the wheels
  • Selecting wheels of electric bicycle as object, aluminum alloy wheel structure is chosen as research prototype, and the structure of magnesium alloy wheel is optimized by simulation and analysis using FEM analysis tools
  • Step 4: If the results are not satisfied during the strength checking, the structure parameters of magnesium alloy wheel should be redesigned, return to step 2
  • In order to analyse further the states of stress which the aluminum alloy wheel and magnesium alloy wheel are under the moment, a graph about the change of stress in local which the value is maximum in a cycle is drawn
结果
  • Step 5: If the results are satisfied during the strength checking, move into developing the forming technology optimization design of magnesium alloy wheel, trial- manufacture.
  • Structure redesign of Magnesium Alloy Material Substitution for Wheels of Electric Bicycle
  • Dynamic bending fatigue test of wheels of magnesium alloy material and of aluminum alloy have been simulated respectively for their same structure, will analyses the results of them.Their stress distribution are showed as follow Fig.1 and Fig.2.
  • In order to analyse further the states of stress which the aluminum alloy wheel and magnesium alloy wheel are under the moment, a graph about the change of stress in local which the value is maximum in a cycle is drawn .
  • In order to determine the magnesium alloy wheels strength performance, the stress of maximum value is be checked by he strength criterion.
  • It can be made using the safety factor to check bending fatigue strength of magnesium alloy wheels.
  • The structure for magnesium alloy wheel based on the aluminum alloy wheel is not meet the requirements of the dynamic bending fatigue strength.
  • Shows the spokes arc structural parameters redesign schemes and simulation analysis result.
  • It can be seen that increased maximum stress results from the reducing of the width of spokes.
  • Result shows that maximum stress and stress at the R2, R3 arc location are all declined by increasing the width of spoke and R2, R3 simultaneously, but not obviously.
结论
  • From the analysis of the Scheme 3, 4, 5, 6, it can be concluded that when the width of spoke is increased, the stress concentration of the wheels change furthest by decreasing R4, but only a little change by decreasing R5.
  • It can be concluded that to reduce the maximum stress about magnesium alloy wheel of electric bicycle, two sides of spoke structure must be improved.
  • The optimized parameters of spoke arc for wheel structure redesign is received.The value is R1=24.45mm, R2=13mm, R3=13mm, R4=307.5mm and the value of R5 is still.Through the analysis of wheel bending fatigue experiment simulation, the stress of wheel is improved obviously and the max value of stress is decreased to
表格
  • Table1: Spokes arc structural parameters redesign schemes and simulation analysis result
Download tables as Excel
引用论文
  • S.G.Cui,Z.C.Yang:Journal of Mechanical Strength,Vol.24(2002),pp.617-619.
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  • L.H.Wu:Research on magnesium alloy material substitution for wheel. Chongqing University master degree article 2005.
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  • J.L.Zha,S.Y.Long,S.Y.Xu:Research on production and application technology and development platform for magnesium alloy product. 2005 china die-casting, rheo-diecast manufacturing academic annual.
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  • Y.H.Qie:Structural analysis and optimization on Aluminum Alloy wheel. Hebei University of Technology, 2003.
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  • S.B.Zhao,Z.B.Wang:Fatigue design. Beijing China Machine Press 1992.
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  • Zhengzhou Machinery Research Institute:Technical information of Conventional methods of fatigue design research. Zhengzhou Machinery Research Institute,1986. Ultra-Precision Machining Technologies, CJICUPM2008 10.4028/www.scientific.net/AMR.69-70
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  • Magnesium Alloy Material Substitution Redesign Method for Wheels of Electric Bicycle 10.4028/www.scientific.net/AMR.69-70.631
    Findings
作者
B. S. Pan
B. S. Pan
T. H. Peng
T. H. Peng
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