Propagation of Edge Cracks in Laterally Excited Stiffened Panels
A portion of a stiffened skin structure with a crack along the stiffener is idealized to a rectangular panel clamped on three edges and part of the fourth. The unclamped part of the fourth edge represents the crack. Natural frequencies are estimated by extended Rayleigh-Ritz method and are compared with experimental results. Irwin's crack tip stress intensity factor is assumed to be a product of stress, a function of root of half crack length and a correction factor. The correction factor is estimated by making use of experimental crack growth data and the exponential crack growth law for negative stress ratio. Initial crack is introduced in the form of a saw cut along the panel edge member.
L. R. Dharani, "Propagation of Edge Cracks in Laterally Excited Stiffened Panels," Advances in Colloid and Interface Science, Elsevier, Jan 1979.
Mechanical and Aerospace Engineering
Article - Journal
© 1979 Elsevier, All rights reserved.
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