Title

Propagation of Edge Cracks in Laterally Excited Stiffened Panels

Abstract

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.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1979 Elsevier, All rights reserved.

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