Abstract
An experimental and analytical investigation is conducted on the compressive buckling behavior of an orthotropic plate with a free edge delamination. The plate is a simplified model of stiffener plates. In the present paper two loading edges are fixed and a side edge is simply-supported. The delamination locates at the free edge over the whole length. A Rayleigh-Ritz approximation method is adopted in the analysis. A constrained point is used to allow contacts between the two delaminated surfaces. At this point, relative displacement and two relative slopes are constrained through imaginary springs. The buckling load of the geometrically admissible buckling mode is obtained by an ordinary eigenvalue analysis. The analytical results are compared with the experiment and the results agree well. The effects of the width and the location of the delamination on the buckling behavior are studied analytically for the plates with various aspect ratios. Low local delamination buckling can occur at very low load whe...
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