Main Article Content
Abstract
An energy based smeared stiffener model is developed to obtain equivalent stiffness coefficients of a general grid-stiffened composite cylindrical shell. These equivalent stiffness coefficients are used in the Ritz buckling analysis of the shell. Transverse shear properties are important in a stiffened shell and results are obtained for First order Shear Deformation Theory (FSDT) as well as for Classical Laminated Shell Theory (CLST). Parametric study is carried out to find out the effects of various design parameters on specific buckling load of the shell.
Keywords
Article Details
References
- Vasiliev, V.V., Barynin, V.A. and Rasin, A.F., "Anisogrid Lattice Structures - Survey of Development and Application", Composite Structures, 54, 2001, pp. 361-370.
- Jones, R.M., "Buckling of Circular Cylindrical Shells with Multiple Orthotropic Layers and Eccentric Stiffeners", AIAA Journal, Vol. 6, No.12, 1968, pp. 2301-2305.
- Wodesenbet, E., Kidane, S. and Pang, S., "Optimization for Buckling Loads of Grid Stiffened Composite Panels", Composite Structures, 60, 2003, pp.159169.
- Kidane, S., Li, G., Helms, J., Pang, S. and Woldesenbet, E., "Buckling Load Analysis of Grid Stiffened Composite Cylinders", Composites Part B: Engineering, 34 2003, pp.1-9.
- Jaunky, N., Knight, N.F. and Damodar, R.A., "Formulation of an Improved Smeared Stiffener Theory for Buckling Analysis of Grid-stiffened Composite Panels", Composites Part B: Engineering, 27B, 1996, pp. 519-526.
- Jaunky, N. and Knight, N.F., "Optimal Design of Grid-Stiffened Composite Panels Using Global and Local Buckling Analyses", Journal of Aircraft, 35, 1998, pp. 478-486.
- Damodar, R.A. and Jaunky, N., "Optimal Design of Grid-Stiffened Panels and Shells with Variable Curvature", Composite Structures, 52, 2001, pp.173180.
- Slinchenko, D. and Verijenko, V.E., "Structural Analysis of Composite Lattice Shells of Revolution on the Basis of Smearing Stiffness", Composite Structures, 54, 2001, pp. 341-348.
- Huybrechts, S. and Tsai, S.W., "Analysis and Behavior of Grid Structures", Composites Science and Technology, 56, 1996, pp.1001-1015.
- Wang, J.T.S., "Discrete Analysis of Stiffened Composite Cylindrical Shells", AIAA Journal, Vol. 23, No. 11, 1985, pp.1753-1760.
- Jaunky, N. and Knight, N.F., "An Assessment of Shell Theories for Buckling of Circular Cylindrical Laminated Composite Panels Loaded in Axial Compression", International Journal of Solids and Structures, 36, 1998, pp. 3799-3820.
- Geier, B. and Singh, G., "Some Simple Solutions for Buckling Loads of Thin and Moderately Thick Cylindrical Shells and Panels Made of Laminated Composite Material", Aerospace Science and Technology, 1, 1997, pp. 47-63.
- Reddy, J.N., "Mechanics of Laminated Composite Plates and Shells", CRC Press.
- Timoshenko, S.P. and Gere, J.M., "Theory of Elastic Stability", McGraw-Hill Book Company.
References
Vasiliev, V.V., Barynin, V.A. and Rasin, A.F., "Anisogrid Lattice Structures - Survey of Development and Application", Composite Structures, 54, 2001, pp. 361-370.
Jones, R.M., "Buckling of Circular Cylindrical Shells with Multiple Orthotropic Layers and Eccentric Stiffeners", AIAA Journal, Vol. 6, No.12, 1968, pp. 2301-2305.
Wodesenbet, E., Kidane, S. and Pang, S., "Optimization for Buckling Loads of Grid Stiffened Composite Panels", Composite Structures, 60, 2003, pp.159169.
Kidane, S., Li, G., Helms, J., Pang, S. and Woldesenbet, E., "Buckling Load Analysis of Grid Stiffened Composite Cylinders", Composites Part B: Engineering, 34 2003, pp.1-9.
Jaunky, N., Knight, N.F. and Damodar, R.A., "Formulation of an Improved Smeared Stiffener Theory for Buckling Analysis of Grid-stiffened Composite Panels", Composites Part B: Engineering, 27B, 1996, pp. 519-526.
Jaunky, N. and Knight, N.F., "Optimal Design of Grid-Stiffened Composite Panels Using Global and Local Buckling Analyses", Journal of Aircraft, 35, 1998, pp. 478-486.
Damodar, R.A. and Jaunky, N., "Optimal Design of Grid-Stiffened Panels and Shells with Variable Curvature", Composite Structures, 52, 2001, pp.173180.
Slinchenko, D. and Verijenko, V.E., "Structural Analysis of Composite Lattice Shells of Revolution on the Basis of Smearing Stiffness", Composite Structures, 54, 2001, pp. 341-348.
Huybrechts, S. and Tsai, S.W., "Analysis and Behavior of Grid Structures", Composites Science and Technology, 56, 1996, pp.1001-1015.
Wang, J.T.S., "Discrete Analysis of Stiffened Composite Cylindrical Shells", AIAA Journal, Vol. 23, No. 11, 1985, pp.1753-1760.
Jaunky, N. and Knight, N.F., "An Assessment of Shell Theories for Buckling of Circular Cylindrical Laminated Composite Panels Loaded in Axial Compression", International Journal of Solids and Structures, 36, 1998, pp. 3799-3820.
Geier, B. and Singh, G., "Some Simple Solutions for Buckling Loads of Thin and Moderately Thick Cylindrical Shells and Panels Made of Laminated Composite Material", Aerospace Science and Technology, 1, 1997, pp. 47-63.
Reddy, J.N., "Mechanics of Laminated Composite Plates and Shells", CRC Press.
Timoshenko, S.P. and Gere, J.M., "Theory of Elastic Stability", McGraw-Hill Book Company.