Application of Fracture Mechanics to Built-Up Structures

摘要

The interaction of reinforced and cracked elements in built-up panels of sheets and stringers, and discussions of residual strength and of fatigue crack propagation are presented. The sheet-stiffener interaction problem, modeling of rivet connections, partial failures of stiffeners, and debonding of adhesive bonded panels are reviewed. Available computer programs are referenced. Residual strength of flat panels loaded in uniaxial tension, of curved panels subject to cabin pressure loads, and applicability of fracture mechanics principles to real structures are summarized. The fatigue crack propagation curve, damage development assumptions, and integrally stiffened panels are covered. Example problems with real structures are included.