TY JOUR TI Deformation of a rod compressed by a longitudinal force under rigid constraints on displacement with various boundary conditions KW stability KW rod KW variational problem KW bifurcation points KW onesided constraints KW critical force JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Andryukova, V.Y. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"