Study of Lightweight Frames for Electrically Power-Assisted Cycles

This study investigates the structural performance of a lightweight frame for electrically power-assisted cycles (EPACs) subjected to a variable loading at the front axle, in accordance with the reference standard. A finite element model was developed to evaluate the stress distribution in the frame and was validated through experimental testing using uniaxial strain gauges. Finite element and experimental stress values showed good agreement, confirming the reliability of the model in predicting the global structural response. Experimental results and fatigue considerations based on finite element results indicate that the frame strength is largely verified under the prescribed loading condition. The validated model therefore provides a robust tool for supporting the design and optimization of EPAC frames.