|Synchronous whirling of spinning homogeneous elastic cylinders: linear and weakly nonlinear analyses |
Auteur(s): Mora S.
(Article) Publié: Nonlinear Dynamics, vol. 100 p.2089-2101 (2020)
Ref HAL: hal-02733481_v1
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Stationary whirling of slender and homogeneous (continuous) elastic shafts rotating around their axis, with pin-pin boundary condition at the ends, is revisited by considering the complete deformations in the cross section of the shaft. The stability against a synchronous sinusoidal disturbance of any wave length is investigated and the analytic expression of the buckling amplitude is derived in the weakly non-linear regime by considering both geometric and material (hyper-elastic) non-linearities. The bifurcation is super-critical in the long wave length domain for any elastic constitutive law, and sub-critical in the short wave length limit for a limited range of non-linear material parameters.