| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 101 === In this research, magnesium-lithium alloy (Mg-Li alloy) was introduced into the frame of folding e-bike. The material of Mg-Li alloy was firstly applied on light-weighting structure for vehicles. The frame was designed with the help of finite element method (FEM). It is found that optimizing the geometric outline with improved the moment of inertia can make up for the Young’s modulus of Mg-Li alloy, which is considered to be lower than other alloys used on bike. Also, the stiffness and the strength will be examined to check if it reaches the regulation of standard. Implementing aluminum alloy AL6061-T6 in the frame of Mg-Li alloy, the weight can be reduced by 25%, under the condition that the outline and stiffness are the same on both frame. Comparing the frame to others under the same loading, Mg-Li alloy has the edge on stiffness, strength, and weight. The progress is remarkable to implement Mg-Li alloy and new design method. The material is expected to be widely applied on structure of vehicles in order to save more resources.
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