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Homework Help: Thin walled pressure vessel with external force

  1. Apr 19, 2012 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    σ=pr/t (hoop)

    σ=pr/2t (longitudinal)


    3. The attempt at a solution

    I have longitudinal stress and hoop stress. I'm trying to find shear stress, which should come only as a result of the 40kN from the collar correct? I'm confused with how I can get this on the pressure vessel. Would it be the same as if it were a simple rod?

    Attached Files:

  2. jcsd
  3. Apr 19, 2012 #2


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    Gold Member

    Are you sure you want to use tau = VQ/It? Think again about this.

    What sort of stress does the external load create in the pressure vessel?
  4. Apr 19, 2012 #3
    It has to be shear stress doesn't it? The gage pressure doesn't cause any shear stress, right?

    Does it cause another kind of stress too? Or am I just wrong? Can I get a multiple choice? :smile:
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