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Elasto-plastic Behavior, Buckling and Stability Analysis of Sandwich Cylindrical Shell Panel under Axial Compression and Lateral Uniform Pressure

Shokrollahi, Hassan | 2015

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 48003 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Kargarnovin, Mohammad Hassan; Fallah Rajabzadeh, Famida; Naghdabadi, Reza
  7. Abstract:
  8. In this dissertation, elasto-plastic analysis of deformation, buckling and stability of sandwich cylindrical shell panel with orthotropic core under axial compression and lateral uniform pressure is perfomed. A new study on behavior of sandwich cylindrical shell panels under elasto-plastic deformation is done. In contrast of available analyses in which the core layer assumed to be isotropic and elastic, present analysis includes the sandwich shell having orthotropic elasto-plastic core. The deformation analysis of sandwich shell is performed based on two different theories; one is adopted for sandwiches having a stiff core and the other is proper for sandwiches having a flexible core. Based on differential quadrature method (DQM), an approach to analyze sandwich cylindrical shell panels with any sort of boundary conditions is proposed. In order to verify the applicability of proposed approach, some case studies are studied and the results compared with the FEM results. Also, the effects of geometrical and material properties on the results are investigated. For stability and buckling study, the governing equations are derived using the principle of virtual displacements. Using Ritz method, the equations are solved for deformation components. After verification of the results, the analysis is extended by changing the values of different parameters
  9. Keywords:
  10. Ritz Method ; Buckling ; Stability ; Elastoplastic ; Differential Quadrature (DQ) ; Cylindrical Sandwich Shell

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