%0 Journal Article %T Bimodal optimization with constraints: Critical value of the constraint and post-critical configurations %A Atanackovi£¿ Teodor M. %A Seyraniany Alexander P. %J Theoretical and Applied Mechanics %D 2011 %I Serbian Society of Mechanics, Belgrade %R 10.2298/tam1102107a %X By using a method based on Pontryagin¡¯s principle, formulated in [13], and [14] we study optimal shape of an elastic column with constraints on the minimal value of the cross-sectional area. We determine the critical value of the minimal cross-sectional area separating bi from unimodal optimization. Also we study the post-critical shape of optimally shaped rod and find the preferred configuration of the bifurcating solutions from the point of view of minimal total energy. %K bimodal optimization %K stability of rods %K post-buckling behavior %U http://www.doiserbia.nb.rs/img/doi/1450-5584/2011/1450-55841102107A.pdf