how to define orientation of layers and what should be thickness of cylinder?is it equal to thickness of layers? what should be boundary conditions when internal pressure is applied?
You might want to try SwiftComp which can power conventional shell element in ANSYS with high-fidelity composites modeling capability so that composites can be modeled as easy as metals. It can give you the most accurate stress for each layer based on a regular ANSYS shell analysis. The code can be launchd in the cloud at https://cdmhub.org/resources/scstandard. A convenient ANSYS-SwiftComp was also developed for making the job easy and SwiftComp acts as an internal plugin for ANSYS. The interface can be downloaded at https://cdmhub.org/resources/1136.
You can use SECDATA command to define the material property, orientation and thickness of the layer material. Using GUI follow preprocessor-sections-shell-layup-add/edit to enter the orientation ad thickness of the laminated composite. For thickness, its depend on your choice of element. If you are selecting layered solid element like SOLID185 layered element for model then the thickness of the volume created and entered value in the layup section should be same for each layer. For shell element like SHELL181 element you need to model only the area and the thickness of each layer should be entered separately through the SECDATA.
For modeling the cylinder select the cylindrical coordinate system and aligned the coordinate axes of each layer to the cylindrical coordinate system.
Thank you sir for your attention and guidance. Sir I am using SHELL181 element, but in modelling while creating cylinder it is required to input inner and outer diameter. So what values should be entered? and what will be boundary conditions?