Optymalne kształtowanie ustrojów kratowych w warunkach pełzania w nawiązaniu do teorii wyboczenia Rabotnowa-Szestierikowa

In this paper are considered the optimal truss structures under the conditions of creep. Optimal configurations are determined for the four simple trusses. Minimal volume of the truss structures is taken as the criterion. For the compression bars the constraint is given on the basis of the creep buckling theory. The Kachanow theory of creep rupture is used for bars in tension. The results are represented in the form of diagrams showing the optimal angle in terms of the dimensionless slenderness coefficient. Numerical calculations are given for the simplest lattice structure. Results are compared with the results of papers [22] concerning elastic-plastic buckling and of [29], concerning the creep buckling on the basis of the KempnerHoff theory.