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Homework Help: Solid Mechanics Stress Blocks- Principle blocks

  1. May 15, 2014 #1
    Hey guys, I would just like some confirmation that I got this question correct.

    1. The problem statement, all variables and given/known data
    For the stress block shown in Figure 3a, using the stress equations;
    a) Calculate the stresses sigmax' sigmay' and taux'y' on a stress block rotated 15° clockwise from the x-y axes.
    b)Calculate the principal (normal) stresses and the principal in-plane shear stress (and
    corresponding normal stresses) and their orientation (rotation angle). Sketch both these situations
    on stress blocks. Assume plane stress conditions.

    View attachment 2012 Test 2 Q3.pdf
    2. Relevant equations
    This PDF has the relevant equations. View attachment CIV2206_exam_2011_equations.pdf

    3. The attempt at a solution
    Look at PDF in part a.

    Help would be much appreciated,
    Thanks in advance.
  2. jcsd
  3. May 17, 2014 #2
    Do you have a specific question?
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