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Tie Rod Stress Analysis - Critical locations

  1. Jul 14, 2014 #1
    I'm faced with a problem where I need to cut the length of the rod body on a tie rod, however, I need to prove that this modification will not affect the entire structure seeing as how the critical points of stress on a tie rod exist at the clevis and end rod. How would I go about proving that these are in fact the critical locations??
     
  2. jcsd
  3. Jul 18, 2014 #2
    Hello,

    I am not a tie rod specialist, so I do not know the specific load pattern for such piece of equipment (you are talking about a tie rod in a car steering system right?), but it appears to me that a tie rod, although they might come in a lot a shape, can be viewed as a cylindrical beam used to transmit a compressive or tensile force ( along its axis). So, if you intend to cut that cylinder and fully weld it back together with a homogeneous material, you have the same area to transmit the forces, therefor the same static stress. It should withstand the same load for the same lifetime. Hence, you don't have to prove that the clevis and the rod end are critical.

    Being shorter, it will be less prone to buckling. If the welding is done properly (no cracks), there should not be a problem with fatigue.

    hope I understand your problem correctly and I could help. If not, can you give us a little bit more information on the tie rod geometry and the loading pattern.
     
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