Deformation of three-layer cylindrical shells with transversally elastic core in a vicinity of the critical compression

Semenyuk, NP
Trach, VM
Zhukova, NB
Dopov. Nac. akad. nauk Ukr. 2019, 5:44-55
Section: Mechanics
Language: Ukrainian

Using the asymptotic Koiter—Budyansky method, a procedure is developed for solving the problem of stability and the postbuckling behavior of a sandwich shell with a lightweight core, which has elasticity only in the transverse direction. The resolving system of nonlinear equations is derived, by taking the discreteness of the structure into account, which allows us to consider general and local variants of the forms of buckling. The calculation of the structures consisting of two cylindrical carbon-fiber shells interacting by means of a spring core was performed.

Keywords: asymptotic method, postbuckling behavior, sandwich shells, stability, transversally elastic filler

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