Sahil Sura
Ansys Employee

Hi Chalke,

You can unfold the following types of walls, but you must right-click a planar face and not a cylinder or a cone:

  • Planar walls
  • Cylindrical walls, including large diameter cylinders (roll bends)
  • Most conical walls, such as a part with variable radius round between arcs that was shelled and converted to a sheet metal part. Parts that are made with blends between radii also unfold reliably.
  • Z bends and S bends, even when they neighbor a cylindrical or conical wall.
  • Walls that includes holes that touch a bend or are included in an object that includes a bend.
  • Double-walled parts that include a complex unbending edge.

You also might want to try including the 'Beta options', which can be found in Workbench window >> Tools >> Appearance >> Beta Options

More information on the unfold option can be found in the following references which also include some examples too.
Unfolding Sheet Metal Components (ansys.com)

Hope this helps,
Thanks!
Sahil