Sheet metal defllcetion calaculation for slide in type of snap fitment

[abhinj]

Hello All,
I want to deign an sliding in (Snap fit , lancing and forming combination) for one of requirement . i got few ideas for snap design / profile but i am not getting any idea how to calculate the sheet deflection and other stuff to validate my deign.
i would like to know if there are any standard set of design guidelines for sheet metal snaps / lance similar to plastic snaps design.

Please find the attached image for reference

 

[berkshire]

Try using the spring back allowances in the bend formulas.
B.E.

You are judged not by what you know, but by what you can do.