How to unbend sheetmetal model that has small radius than thickness at edge?

[yseo]

I made sheetmatal model using extrude without "add bends on sharp edge"

And added round at edge with small radius than sheetmetal thickness

After that I could not make unbend

How to do?

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[StephenW]

Please add a picture. I think it will help us understand what you are asking.

[yseo]

Please refer the following image.

I created sheetmetal wall using extrude and thickness is 1.

And I added round to sharp edge and radius is 0.8.

After I click "flat pattern" but I could not make flatten

Please check and give me good solution.

Thanks.

[StephenW]

To get a flat pattern, you must have constant thickness for sheetmetal (by definition sheet metal is a constant thickness material. When you have a round on one corner and not the other, you have made a non-constant thickness.

My opinion is if you want a sharp inside corner, use the option to add bends and use a 0 (zero) bend radius on the inside.

Your outside radius will be the material thickness since that is what is required to keep a constant thickness.