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Shear stress in beam formula

  1. Nov 4, 2016 #1
    1. The problem statement, all variables and given/known data
    In this notes , why the shear force used is the 19.5kN ? Why not 6.5kN ?
    From what i know , the formula of shear stress is tau = VQ/ It , where V is the shear force ..... There are two values of V in this question , why the larger one (19.5kN ) is chosen ?


    2. Relevant equations


    3. The attempt at a solution
    Is it wrong ? or the 19.5KN is chosen for the shear force at the right end ?
    While 8.5kN is chosen for the shear force at right end ?
     

    Attached Files:

  2. jcsd
  3. Nov 4, 2016 #2

    PhanthomJay

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    The highest shear is at the right end so that controls the design p
     
  4. Nov 4, 2016 #3
    For so the design of beam , we will always choose the larger shear force to find the larger shear stress ?
     
  5. Nov 4, 2016 #4

    PhanthomJay

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    For design of the glue type, yes, choose the larger value of shear. Now in theory, you could use a weaker glue or less glue as you move away from the area of max shear stress, but in practice, you likely wouldn't do that.
     
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