Ansys 13 modeling two tubes

[Baqoy]

Hey guys,

For a project at uni, i need to model a gfrp tube that gets glued to the inside of a steel tube but im not really sure how to go about making the geometry. I have been able to sketch/extrude the two tubes and the adhesive, but they seem to join together to form 1 part. I also tries using cylinder primitives but the same thing occurs. Any advice what i should do? Sorry we werent given any tutorials or anything on how to use ANSYS.

Thanks