AutoCAD Inventor :: Sheet Metal Style For Corrugated Fiberboard

I had good success making flat patterns for corrugated fiberboard (cardboard commonly used in packaging). I am posting the sheet metal settings here because I didn't find them anywhere else.

This forumla comes from Inventor Reference Guide > Work Environment > Styles and Style Libraries > Work with styles > Linear:

Unfolded length = (inner Bend Radius + KFactor*Thickness)*(Bend Angle)

where bend angle is in radians.For corrugated_fiberboard, let inner Bend Radius = 0 and let KFactor = 1 (no stretch on outside, inside compresses).

Setup "corrugated fiberboard" sheet metal style in the Style Editor:
from a sheet metal part, ribbon > Manage > Style Editor
> Left pane, Sheet Metal Unfold, Default_KFactor > New > Name: corrugated_fiberboard_KFactor
  > Unfold Method: Linear, KFactor Value: 1 ul
> Left pane, Sheet Metal Rule > Default > New > Name: corrugated_fiberboard
  > Sheet tab > Unfold Rule: corrugated_fiberboard_KFactor
     For thickness, refer to [URL] .....
  > Bend tab > Bend Radius: .0001
> Save

Before you save Styles to Style Library, make sure your Style Library is Read-Write.  Close project files and then from Projects:

  Use Style Library = Read-Write

To save a style:

  Ribbon > Manage tab > Styles and Standards panel > Save icon > click "Yes to All", OK

Changes made to a style library are not available in other documents until the current Autodesk Inventor session closes and a new session is reopened.To make a fiberboard mock up, print a 1:1 scale drawing, contact cement drawing to fiberboard, cut, fold, and hot glue.