Buckling load optimization of composite shells taking thermal manufacture effects into account

2000 ◽  
Author(s):  
J. Foldager ◽  
N. Olhoff ◽  
J. Hansen
Keyword(s):  
Buckling Load ◽  
Composite Shells ◽  
Load Optimization

Buckling load optimization of beams

2005 ◽  
Vol 74 (11-12) ◽  
pp. 790-799 ◽  
Author(s):  
J.T. Katsikadelis ◽  
G.C. Tsiatas
Keyword(s):  
Buckling Load ◽  
Load Optimization

An Experiential Optimization Design Method for Orthogonal Rib-Stiffened Thin Walled Cylindrical Shells under Axial Loading

2011 ◽  
Vol 110-116 ◽  
pp. 1773-1783
Author(s):  
Jia Mao ◽  
Yu Feng Chen ◽  
Wei Hua Zhang
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Mass Parameter ◽  
Cylindrical Shells ◽  
Reference Value ◽  
Buckling Load ◽  
Element Analysis ◽  
Buckling Loads ◽  
Load Optimization ◽  
Thin Walled

Parametric structural FEA (Finite Element Analysis) models of the orthogonal rib-stiffened thin walled cylindrical shells are established using APDL (ANSYS Parametric Design Language). An experiential optimization design method is then developed based on conclusions of series numerical analysis investigating the effects of parameters’ modification upon buckling loads and modes of the structure. The effects of single design parameter modification under both variational and fixed volume (mass) constraints upon the buckling loads and modes indicate that, only one design scheme is able to obtain maximum buckling load when deployment of the strengthening ribs and volume (mass) parameter were settled previously, and minimum mass would be obtained while this maximum buckling load equals to the required design load. Optimization calculations for aluminum alloy material and layered C/E (Carbon/Epoxy) composite material shells with three layering styles are implemented and discussed, and some useful conclusions are obtained. Method and approach developed in this paper provide certain reference value for the optimal design of such structures.

Parametric Study of Specific Buckling Load of Cylindrical Grid Stiffened Composite Shells

2012 ◽  
Vol 13 (1) ◽  
pp. 482-485 ◽  
Author(s):  
Hamid Shahsavari Alavijeh ◽  
Soroush Sadeghnejad ◽  
Mojtaba Sadighi
Keyword(s):  
Parametric Study ◽  
Buckling Load ◽  
Composite Shells ◽  
Cylindrical Grid

Thermal buckling load optimization of laminated general quadrilateral and trapezoidal thin plates

2013 ◽  
Vol 20 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Umut Topal
Keyword(s):  
Plate Theory ◽  
Mathematical Formulation ◽  
Thermal Buckling ◽  
Laminated Plates ◽  
Buckling Load ◽  
Thin Plates ◽  
Load Optimization ◽  
Aspect Ratios ◽  
Feasible Direction Method ◽  
Optimization Routine

AbstractThis paper deals with thermal buckling load optimization of symmetrically laminated angle-ply general quadrilateral and trapezoidal thin plates. The objective function is to maximize the critical temperature capacity of the quadrilateral and trapezoidal laminated plates and the fiber orientation is considered as a design variable. The mathematical formulation is based on the classical laminated plate theory for the frequency analysis. The modified feasible direction method is used as the optimization routine. Therefore, a program based on FORTRAN is used. Finally, the significant effects of aspect ratios, boundary conditions, taper ratios and unsymmetric trapezoidal plates on the optimal results are investigated and the results are compared.

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