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Homework Help: Tension and compression in axially loaded members

  1. Mar 30, 2015 #1
    ImageUploadedByPhysics Forums1427748053.706400.jpg ImageUploadedByPhysics Forums1427748067.520071.jpg

    The question tells us that a tensile force of 80kN acts upon the thin rod and hence we know there will be an equal but opposite force on the other side. However, I don't understand why there are compressive forces on the tube? We aren't told about this in the question.

  2. jcsd
  3. Mar 30, 2015 #2


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    When you pull on the rod at point C, the tensile force is transmitted back to the plate and nut at point B. You cannot have a tension in the tube with this arrangement of parts.

    Remember, the tube supplies a reaction to the rod so that it remains in equilibrium when the tensile force is applied.

    You weren't told this in the question because it should be rather obvious. :wink:
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