The aim of the experiment is the experimental verification of FEM-models on a planar composite panel, using shearing load and determination of the buckling load. Experimental set-up The perforated shearing panel is clamped on all four sides into a steel frame, which has a joint in each corner and can thus create a pure shearing strain in the board. In order to deform the board, a force is applied to one corner of the frame. Experimental data Measurements of the shearing panel: approx. 600x600mm²
Free shearing area: approx. 500x500mm²
Thickness of the panel: 3mm
Measuring area: approx. 1 / 4 of the board (upper left-hand corner)
Grating pattern: stochastic pattern (sprayed onto surface) Experimental results If the images of the strain distributions in x- and y-direction are divided from the upper left to the lower right, then the extensive area of tensile strain in x-direction (positive strains) lies mostly below this diagonal. Its maximum is level with the upper edge of the punch-out in the shearing panel and reaches strain values of about 0.14%. In the distribution of strain in y-direction the area of tensile strain lies mostly above the diagonal and reaches values of up to 0.2%. In the lower right side of both images there is an area of strain, whose maximum reaches values of -0.24% and -0.18%. In the image of the shearing there is an extensive area with low shear-values (0°) on the diagonal, that increase only towards the lower right corner of the image. The maximum shear reaches values of about 0.16° and lies in the area of maximum strain in x- and y-direction. | 
