Curved Beam is a beam in which the neutral axis in the unloaded condition is curved instead of straight. Or If the beam is originally curved before applying the bending moment.
Curved beams have applications in many machine members such as c – clampers , crane hooks, frames of presses, chains, links, rings, etcThe main difference between curved beams and straight ones that the Neutral axis does not coincide with the cross section, but is shifted towards the center of curvature of the beam.
this spreadsheet will help you to design easily curved beams
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