Author(s)

Mark Gandelsman & Ori Ishai

Abstract

A laminated composite beam with geometrical discontinuity serves as an analytical and experimental model, representing the mechanical behavior of stiffened panels under flexural load. Failure in this case initiates at the corners of the rectangular groove and propagates along the interlaminar plane. Numerical analysis shows a singularity on both interlaminar tensile and shear stress distribution at the free edge close to the sharp 90° corner. This singularity changes into a finite maximum in the case of a rounded corner. The maximum stress close to the corner tends to vary as a function of the depth of the groove and the radius of the curvature at the corner. Results of the experimental investigation indicate a significant reduction of moment at d

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