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Deflection of Beams - Rearrange formula

  1. Oct 28, 2009 #1
    Deflection of Beams - Rearrange formula [URGENT]

    1. The problem statement, all variables and given/known data

    Deflection for a simply supported beam... I calculated the deflection of it to be 9.72mm downwards, but there is a support 6mm from the original position and need to calculate the force on the support...

    The original formula for deflection is:

    y = - (F x L^3)/(48 x E x I)

    where 'x' is just the multiplication symbol.


    2. Relevant equations

    y = - (F x L^3)/(48 x E x I)

    3. The attempt at a solution

    To find the force on the support, I went 9.72-6 = 3.72mm

    I substituted 3.72 into the equation above as 'y', now, how do i rearrange the formula to find F?

    My attempt:

    F = (48 x E x I)/(Y x L^3)

    I get 2.212 MPa, this surely can't be right as the original load on top is 80KN. Did I rearrange correctly?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 28, 2009 #2

    PhanthomJay

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    Re: Deflection of Beams - Rearrange formula [URGENT]

    Is this a beam on 3 supports?
     
  4. Oct 28, 2009 #3
    Re: Deflection of Beams - Rearrange formula [URGENT]

    Simply supported, no, not 3 supports, doesn't matter I've figured it out now. Thanks.
     
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