Analysis of the fracture toughness parameters at the free edge in layered composites

Авторы: Bondarchuk D.A., Fedulov B.N., Fedorenko A.N., Lomakin E.V.
Журнал: PNRPU Mechanics Bulletin
Номер: 4
Год издания: 2020
Первая страница: 49
Последняя страница: 59
DOI: 10.15593/perm.mech/2020.4.05
Аннотация: The problem of deformation and elastoplastic buckling of shells of revolution with a thick-walled elastic core under combined static and dynamic loading is formulated in a two-dimensional planar formulation based on two approaches: full-scale modeling within the framework of continuum mechanics and a simplified formulation based on the hypotheses of the theory of shells of the Timoshenko type and the Winkler foundation. Both approaches allow solving the problems of deformation and stability of non-shallow shells on the basis of Timoshenko's hypotheses, taking into account geometric nonlinearities. The statement from the perspective of continuum mechanics makes it possible to approximate the shell in thickness by a number of layers of finite elements. The constitutive relations are formulated in Lagrange variables using a fixed Cartesian coordinate system as a reference one. Kinematic relations are recorded in the metric of the current state. The elastic-plastic properties of shells are described by the theory of plastic flow with isotropic hardening.
Добавил в систему: Ломакин Евгений Викторович

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