SPACE DEVICE (VERSIONS) AND AIRCRAFT (VERSIONS), ELONGATED ELEMENT OF SPACE DEVICE OR AIRCRAFT (VERSIONS), COMPOSITE SPAR, METHOD OF MAKING ITS MODEL AND ITS PRODUCTION AND COMPUTER Russian patent published in 2013 - IPC B64C3/18 B64C1/06 B64G1/22 G06T17/00 G06F17/50 

FIELD: transport.

SUBSTANCE: invention relates to aerospace engineering, particularly, to elongated element and spar from laminar composite and method of developing their computer model and method of producing elongated element. Elongate element comprises base with first surface and second surface located opposite the first one, and rib with third and fourth surfaces. Cross-section of elongated element varies along its length with linear increase along said length of elongated element of structure of geodesic distance between first reference line located at first surface and second reference line located at third surface. Composite spar has top and bottom flanges jointed by rib and integral composite material extending between two opposite edges from top flange via rib to bottom flange. Geodesic distance over spar width measured along single layer between two opposite edges increases linear along single layer length. Method of making spar model comprises preparing first data on geometry of top and bottom flanges, nonlinear variation of spacing between flanges along spar length which, spar root, exceeds that nearby spar end, and generation of second data describing rib shape, that of top and bottom flange of spar model. Method of making said elongated comprises making mould, placing composite material layers therein, and curing said layers.

EFFECT: decreased strains in spar.

27 cl, 21 dwg