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Questions on Bending Stresses (which area will have 0 stress)

  1. Jul 4, 2009 #1
    http://en.wikipedia.org/wiki/Bending

    Please have a look on the right most picture in "Stress in large bending deformation".
    The Stress distribution shows that the bending center is not locate at the middle of the cross-section. (which also happen at connection caculation)

    However, base on normal caculation on a beam under bending, the equation used(Stress=M*y/Ixx) is still assuming zero value at crosssection's center line.

    I wonder what is their relationship.

    Thank you very much in advence.
     
  2. jcsd
  3. Jul 4, 2009 #2
    stress = My/Ixx

    When y=0, stress = 0.

    Do you know what "y" is?(it is not the the distance of plane from the center plane of the section always) Have you read about the neutral plane?
     
  4. Jul 14, 2009 #3
    Neutral plan ftw!
     
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