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Bending stress

  1. Apr 25, 2012 #1
    hi all ,

    I am a new member in physics forums and I hope I can help and get benefit from this forums .

    I would ask any one knows about the moment of inertia cos i have not study it before and I have to know it to solve a bending stress problem ..

    when I used the moment of inertia for rectangle as 1/3 bh^3 and when I use it as 1/12 bh^3

    as I now I use the first one when the neutral axises pass through the centroid and the second one when it not pass through the centroid .. but how can I know if the neutral axises pass through the centre of gravity or not ?


    sincerely
    falah alajmi
     
  2. jcsd
  3. Apr 27, 2012 #2
    there is no one knows the answer
     
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