WATSON, A., KENNEDY, D. and WILLIAMS, F.W., 1999. Design of structures by a splitting method. Computers and Structures, 70(4), pp 377-386
A simplified method for the design of multi-spar wing boxes is presented.
In typical multi-spar wing boxes the spars divide the boxes into cells. In the method
presented these are analyzed individually, with adjacent cells taking their share of the
stiffnesses of the common spar wall. This splitting method yields a design method
that is computationally much quicker than designing a complete wing box, because
each cell is considered separately from the others, except for linking between their
design variables. The critical buckling load factor of the assembled structure when
designed in this way will usually exceed the design load factor and otherwise will be
equal to it, i.e. the design is guaranteed to be conservative.