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Tube bending ?

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Jamaz17

Automotive
Aug 20, 2004
131
Hey everyone,

I have to bend a piece of round steel tubing 20 deg with an OD of 1.75in and a wall thickness of .125in. Does anyone know what formula I might use to calculate the force I would require to bend this pipe to these specs ? I'm trying to spec out a cylinder but I'm not sure how much force I will need?

Thanks for the help.

-James
 
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You should be able to bound your problem by treating it as a beam and solving the beam equation using the end conditions that best approximate your bending fixture.

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Bring back the HP-15
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Assume yield stress over the whole cross section to find bending moment (approximately). If you have a stress-strain curve, guess you could come a bit closer.
 
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