Abstract
The large flywheel energy storage system requires very high radial tensile strength of the flywheel rim, for the sake of the ultimate strength requirement, multilayer flywheel rim structure of carbon fiber/glass fiber hybrid composite is employed in the paper. Both stress calculation and FEM analysis show that rational densign of the layer thickness and the hybrid ratio of carbon fiber to glass fiber can reduce radial strength requirement of rim material, especially for large flywheel energy storage system.
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