Yazarlar
- Topal, U.(1)
- Topal, Umut(1)
- Uzman, Ü.(1)
- Uzman, Ümit(1)
Yayınlar
- MakaleYalnız künye2009Thermal buckling load optimization of angle-ply laminated cylindrical shells
Topal, U.; Uzman, Ü.
In this study, thermal buckling load optimization of symmetrically laminated cylindrical shells subjected to uniformly distributed temperature load is investigated. The objective function is to maximize the critical temperature capacity of laminated shells and the fibre orientation is considered as design variable. The first-order shear deformation theory is used to study thermal buckling response of the laminates. The modified feasible direction method is used as optimization routine. For this purpose, a program based on FORTRAN is used for the optimization of shells. Finally, the effects of number of layers, length-to-radius ratio and boundary conditions on the optimum results are investigated.
- MakaleYalnız künye2009Effects of nonuniform boundary conditions on the buckling load optimization of laminated composite plates
Topal, Umut; Uzman, Ümit
This paper deals with buckling load optimization of symmetrically laminated composite thin plates under the uniaxial and biaxial compressive loads with discontinuities along the boundaries. The objective of the design problem is to maximize the buckling load of the laminated plates and the fibre orientation is taken as design variable. The classical laminate plate theory is used for the mathematical formulations of the laminates. The modified feasible direction method is used as optimization routine. Therefore a program based on FORTRAN is used. Finally, the effect of nonuniform boundary conditions, aspect ratios and load ratios on the optimum results is illustrated.