Optimum Mass-strength Analysis for Orthotropic Ring-stiffened Cylinders Under Axial Compression |
Common terms and phrases
Arf/Ar attached to skin axial compressive axial extensional stiffness bf/bw buckling between rings buckling equation circumferential configuration studied curved element cylinder buckling defined in equation design variables difference in efficiency distance from centroid Dx lDx dx/ey hr ErAr Eo Yr ErIr external stringers external Z-stiffeners Figure flange GrJr honeycomb hr/b hrtrw includes the effects internal or external INTERNAL RINGS EXTERNAL Langley Research Center mass-strength analysis minimum mass-strength curve NASA NASA TN nonsymmetric double bead optimum dimensions optimum value orthotropic cylinder subjected orthotropic wall Poisson's ratios respectively ring and stringer ring material ring spacing RINGS EXTERNAL RINGS stiffened cylinders stiffener eccentricity stiffness ratios structural index Nx/EOR subjected to axial term defined thickness trapezoidal corrugation tubular configuration tubular double bead tw/tf U.S. Customary Units Unstiffened wall see fig yield stress Young's modulus Z-stiffened shell Z-stiffened skin Ўг