ansys, composite materials,grp pipe

hi, i m studieng grp pipes as graduation project and need to modelling the pipe on ansys under inner pressure.

if somebody can help me i ll be very grateful.

the pipe wall contains of 32 layers from glassfiber and epoxy as acomposite material,the layers are [+55(16),-55(16)].

itried to do that using the element shell 91,but i failed.

my mail is yhkasem [at] yahoo.com (yhkasem[at]yahoo[dot]com).

thanks for any help.