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Two dimensional stress problem

  1. Sep 25, 2011 #1
    1. The problem statement, all variables and given/known data

    2yy9j85.png

    3. The attempt at a solution

    My stress element is as follows:

    v3jfo6.png

    Using trig I solved for [itex]\sigma_x^' = 34.641 MPa[/itex].

    Then I used the following equation to solve for [itex]\sigma_x[/itex]:

    2ynl6z4.png

    I get [itex]\sigma_x = 34.07 MPa[/itex]. However, the answer is supposed to be [itex]\sigma_x = 38.68 Mpa[/itex]. Where am I going wrong?
     
  2. jcsd
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