%0 Journal Article %T APPLICATION OF BOUNDARY DOUBLE-GRID ELEMENTS IN THE CALCULATION OF THREE-DIMENSIONAL COMPOSITE BEAMS %A Matveev, A.D. %K composites, beams, elasticity, double-grid finite elements, finite elements method, boundary elements %J Bulletin of KSAU %D 2014 %N %P 5 %I Krasnoyarsk State Agrarian University