Mech eng with a manufacturing option. Work in the fire protection field now doing fluid calcs, fire and smoke modelling, sprinkler systems etc.
I'll admit, I read his question wrong, I thought he was trying to indent something. The scalaped punch is complex too, they give a bit of room for the material to move into so it can more cleanly shear the face. If I remember right, poisson's ratio is part of the calc for how thick you can cleanly punch. The forces in the steel near the edge of the punched hole are very complex.
What pressure is he trying to figure out? Its not the same everywhere on the punch face.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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