Title | Theoretical-experimental method for determining physical and mechanical parameters of viscoelastic material of composite torsion of helicopter main rotor |
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Authors | I. N. Sidorov^{1}, A. V. Gorelov^{1}, L. P. Shabalin^{1}^{1}Kazan National Research Technical University n.a. Tupolev |

Annotation | A method which can be used to carry out the characterization of linear hereditarily-elastic material torsion elements subjected to the Boltzmann-Volterra superposition principle is proposed. The method is based: on the solution of mathematical model equations of the behavior of torsion under constant force loading applied to the end part using finite element software "ANSYS"; using of the experimental data of elastic compliance function parameters of torsion bar end; determining of "instantaneous" shear modulus of rubber layers providing experimental "instantaneous" displacement in the plane of the stroke. |

Keywords | composite torsion of the helicopter main rotor, hereditarily-elastic material of the torsion elements, creep function |

Citation | Sidorov I. N., Gorelov A. V., Shabalin L. P. ''Theoretical-experimental method for determining physical and mechanical parameters of viscoelastic material of composite torsion of helicopter main rotor '' [Electronic resource]. Proceedings of the XIII International scientific conference ''Differential equations and their applications in mathematical modeling''. (Saransk, July 12-16, 2017). Saransk: SVMO Publ, 2017. - pp. 162-169. Available at: http://conf.svmo.ru/files/deamm2017/papers/paper22.pdf. - Date of access: 12.04.2021. |

**© SVMO, National Research Mordovia State University, 2021**

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