Thermal and Mechanical Buckling and Postbuckling Responses of Selected Curved Composite PanelsThe results of an experimental and numerical study of the buckling and postbuckling responses of selected unstiffened curved composite panels subjected to mechanical end shortening and a uniform temperature increase are presented. The uniform temperature increase induces thermal stresses in the panel when the axial displacement is constrained. An apparatus for testing curved panels at elevated temperature is described, numerical results generated by using a geometrically nonlinear finite element analysis code are presented. Several analytical modeling refinements that provide more accurate representation of the actual experimental conditions, and the relative contribution of each refinement, are discussed. Experimental results and numerical predictions are presented and compared for three loading conditions including mechanical end shortening alone, heating the panels to 250 F followed by mechanical end shortening, and heating the panels to 400 F. Changes in the coefficients of thermal expansion were observed as temperature was increased above 330 F. The effects of these changes on the experimental results are discussed for temperatures up to 400 F.
Breivik, Nicole L. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Hyer, Michael W. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Starnes, James H., Jr. (NASA Langley Research Center Hampton, VA United States)
August 17, 2013
January 1, 1998
Publication: Stability Analysis of Plates and Shells