Flexible aircraft girder with high energy absorption

Details Flexible aircraft girder with high energy absorption Flexible aircraft girder with high energy absorption

B - Operations, Transporting

64

C

244/84

B64C 25/58 (2006.01) B64C 25/52 (2006.01) B64C 25/64 (2006.01)

Patent

CA 1235409

ABSTRACT FLEXIBLE GIRDER WITH HIGH ENERGY ABSORPTION, AND LANDING GEAR AND TAIL SKID FOR AN AIRCRAFT EQUIPPED WITH SUCH A GIRDER The flexible girder made of composite materials and with high energy absorption is in the form of an elongate box of laminated structure comprising two rigid flanges (6,7) connected by two webs (9) which have aligned apertures (13). A deformable energy- absorbing block (14') is arranged between the two flanges (6,7) at the apertures and comprises a block of an elastomeric material (15). The block (14') absorbs the buckling deformation energy of the flange (6) which is subjected to compressive stress during flexion of the girder, by resting on the other flange (7) which is subjected to tensile stress. The block (14') controls the buckling of the flange (6) and only gives back part of the energy absorbed. Application to the equipment in particular of skid landing gear for helicopters and tail skids for aircraft.

466972

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