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FROM:
Jaehong Lee, Zafer Gurdal and O.H. Griffin (Dept. of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA), “Buckling and postbuckling of circular plates containing concentric penny-shaped delaminations”, Computers & Structures, 09/1995, Vol. 56, No. 5, pp 1045-1054, 1995, DOI: 10.1016/0045-7949(95)00194-L
ABSTRACT: Buckling and postbuckling analyses of circular laminated composite plates with delaminations are presented. An axisymmetric finite element model based on a layer-wise laminated composite plate theory is developed to formulate the problem. Geometric nonlinearity in the sense of von Kármán and imperfections in the form of initial global deflection and initial delamination openings are included. A simple contact algorithm which precludes the physically inadmissible overlapping between delaminated surfaces is proposed and incorporated into the analysis. Numerical results are obtained addressing the effects of the initial imperfections, the number of delaminations and their sizes on the critical buckling load and buckling mode shapes, as well as postbuckling responses.
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