# Semi-Analytical Models for Conical and Cylindrical Shells (conecyl)

A semi-analytical approach for the linear and non-linear buckling analysis of imperfect unstiffened laminated composite cylinders and cones under axial, torsion and pressure loads.

The development of this module was motivated by the research topics covered during the European Project DESICOS (http://www.desicos.eu).

- Developing the code for the conecyl module
  - History about the software used to derive the equations
  - Current implementations
  - Definitions
  - Integration of the linear matrices
  - Integration of the non-linear matrices
  - Strain Equations
  - Internal Forces
- Equivalent Single Layer (ESL) Theories
  - CLPT - Classical Laminated Plate Theory
    - Description
    - Models
  - FSDT - First-order Shear Deformation Theory
    - Description
    - Models
- Boundary conditions
  - Using the default boundary conditions
  - Using arbitrary boundary conditions
- Tutorials
  - Defining the Geometry
  - Defining the Laminate and Material Properties
  - Linear Static Analysis
    - Static Analysis
  - Non-Linear Analysis
- References

Special Acknowledgements:

- DESICOS project (http://www.desicos.eu)

- PFH - Private Fachhochschule Goettingen, campus Stade (https://pfh.de)

- Technical University of Clausthal (TU Clausthal http://www.tu-clausthal.de)