EXPERIMENTS ON INEXTENSIONAL COLLAPSE OF CIRCULAR PAPER DISKS INCLUDING THE INFLUENCE OF HOLES

Buckling behaviour of circular filter papers, as isotropic plates with high aspect ratio, negligible weight-stiffness ratio and little abili ty to undergo in-plane strains prior to delamination, has been studied . The study covers the results of deforming circular papers under thre e equally spaced radial loads and the effect of holes punched within t he samples to help formation of single curvature modes without points of discontinuous slope. The results of a few experiments on eccentrici ty of the holes are also presented.