Cylindrical tubes of moderate wall thickness, such as those proposed for the original space station truss, may fail due to the gradual collapse of the tube cross-section as it distorts under load. Sometimes referred to as the Brazier instability, it is a nonlinear phenomenon. This paper presents an extension of an approximate closed-form solution of the collapse of isotropic tubes subject to end moments developed by Reissner in 1959 to include specially orthotropic material. The close-form solution was verified by an extensive nonlinear finite element analysis of the collapse of long tubes under applied end moments for radius-to-thickness ratios and composite layups in the range proposed for recent space station truss framework designs. The finite element analysis validated the assumption of inextensional deformation of the cylindrical cross-section and the approximation of the material as specially orthotropic.
Nonlinear bending and collapse of composite tubes
Nichtlineares Biegen und Versagen zusammengesetzter Rohre
MSC World User's Conference, 1992 ; 2 , May ; 1-16
1992
16 Seiten, 12 Bilder, 1 Tabelle, 6 Quellen
Aufsatz (Konferenz)
Englisch
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