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Abstract
The damping characteristics of the composite thick-walled hollow shaft directly affect its amplitude of rotational vibration at low speeds and stability at high speeds. In this study, the shaft is made of carbon fiber reinforced plastic (CFRP) material. In order to study the damping characteristics of the composite hollow shaft, a 3D numerical damping model was established based on finite element method and strain energy expression. In this regard, both the contributions of in-plane and out-of-plane strain energy dissipation were studied. Then, the validity of 3D damping model in bending was verified by experiments. On this basis, the flexural damping characteristics of the thick-walled composite shaft were studied, and the effects of orientation angle and stacking sequences on the flexural damping were obtained.
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