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Post–Buckling State of Rectangular Plate Stiffened by Denselly Arranged Ribs. Numerical Analysis and Experimental Investigation

Kopecki H., Święch Ł.

Mechanics and Mechanical Engineering

2013

Vol. 17, nr 1

71--87

The paper presents results of comparative experimental examinations and numerical analyses of rectangular plates subjected to shear treated as a skin of half–monocoque aircraft structure. There were considered: the plate without stiffeners 2 mm thick and structure with 1 mm thickness, stiffened by 15 integral ribs. Results of nonlinear numerical FEM analyses and experimental investigations with use of 3D DIC method were compared to ones conducted for smooth plate with equivalent mass. It was documented that introduction of sub–stiffening significant influence on both the form of deformation and distribution of stress in the structure. For smooth plate low cycle fatigue test was conducted.