Abstract
In this study the problem of a stiffened plate containing a through-crack under uniform bending load is analyzed. The problem is formulated for a specially orthotropic material by using Reissner's plate theory. By using the Fourier integral transform technique the problem is reduced to a singular integral equation. This singular integral equation is then solved numerically by using Gȧuss-Chebyshev and Gauss-Jacobi quadrature formulas. The special case of the problem in which the crack tip terminates at the stiffener is also analyzed in order to assess the crack arrest effectiveness of the stiffener. The asymptotic stress state near the crack tip terminating at the stiffener is examined, and normalized Mode I stress intensity factors are tabulated. The results also include the effect of Poisson's ratio, stiffness constants and material orthotropy for specially orthotropic materials on the stress intensity factors.
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