Theory of multi-spar and multi-rib wing structures

Theory of multi-spar and multi-rib wing structures

Grzedzielski, A.L.M.

National Research Council Canada, National Aeronautical Establishment, Structures Laboratory

1961-01-31

A method of stress and deflection analysis of low aspect ratio wings, proceeding entirely with redundant stress distributions, is presented. On the assumption of parallel ribs and converging spare, which determines the system of co-ordinates for the analytical work, all effects of laterel contraction, of wing sweep and taper, are correctly accounted for. A theory of a torque box of trapezoidal plan farm is developed and a thorough criticism of the adopted lumping technique is given. The theory of thermal effects and of local plastic action is proposed. The method presumes the use of a digital computer of medium size and the results of computation appear in the form of matrices relating stress and displacement to a set of unit loads and temperatures.

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National Research Council Canada

Campus only

National Research Council Aeronautical Report LR 297; NRC No. 6187

Aerospace Engineering Reports

report

(c) 1961 National Research Council Canada