INTERACTING LOADS IN AN ORTHOGONALLY STIFFENED COMPOSITE CYLINDRICAL SHELL

摘要

The distributions of the interacting loads between orthogonal stiffeners and the shell wall are computed for a long circular cylindrical shell subjected to internal pressure. Identical stringers are equally spaced around the circumference, and identical frames, or rings, are equally spaced along the length. Both the stringers and frames are on the inside of the shell wall. Closed-end pressure vessel effects are included. A comparison is made between the linear elastic response and geometrically nonlinear elastic response. The example problem has dimensions of the fuselage of a typical transport aircraft, and has a composite material shell wall and symmetric stiffeners. The inclusion of geometric nonlin-earity is found to increase the loads carried by the stiffeners and decrease the pillowing, or bending, of the shell. The interacting normal load intensity exhibits singular behavior at the stiffener intersection.