Obtained and predicted postbuckling responses of [45/-45] carbon/epoxy cylinders under axial compression

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Rigoberto Burgueño, Nan Hu, Annelise Heeringa and Nizar Lajnef (Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA),

“Tailoring the elastic postbuckling response of thin-walled cylindrical composite shells under axial compression”, Thin-Walled Structures, Vol. 84, pp 14-25, November 2014, DOI: 10.1016/j.tws.2014.05.009

ABSTRACT: The buckling of cylindrical shells has long been regarded as an undesirable phenomenon, but increasing interests on the development of active and controllable structures open new opportunities to utilize such unstable behavior. In this paper, approaches for modifying and controlling the elastic response of axially compressed laminated composite cylindrical shells in the far postbuckling regime are presented and evaluated. Three methods are explored (1) varying ply orientation and laminate stacking sequence; (2) introducing patterned material stiffness distributions; and (3) providing internal lateral constraints. Experimental data and numerical results show that the static and kinematic response of unstable mode branch switching during postbuckling response can be modified and potentially tailored.

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