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Homework Help: Find the average shear stress at each pin

  1. Nov 26, 2011 #1
    1. The problem statement, all variables and given/known data

    View image for all details

    2. Relevant equations

    tao = V/A

    3. The attempt at a solution

    I went ahead and solved the force at BC and the x and y components at A, but I feel as though my solutions are incorrect. At BC I have F = 825 kN (up and to the left), A_x = 714.5 kN positive, A_y = 247.5 kN downward. I don't know how to solve the pins from here. The correct answer at each pin is 324MPa. I found the area to be 508.94mm^2 but am unable to find what force is pulling on each pin.

    Attached Files:

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  2. jcsd
  3. Nov 26, 2011 #2


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    ptguard1: Your area is correct. Your reaction forces are currently incorrect. If you want to show your work, someone might check your math.
  4. Nov 27, 2011 #3
    I recalculated my solutions and found my mistake. F at BC = 165 kN (up and to the right), A_x = 142.89 kN to the right, A_y = 82.5 kN up. The issue i'm having is solving for the shear stress in the pins. I don't understand why all of the pins would have the same result.

    For the pin at A, I interpret it as shown in the attached image

    I used the equation A_x/Area, but i know that I need the force to be 165kN

    Attached Files:

    Last edited: Nov 27, 2011
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