1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Stresses and strains in steel sheet

  1. Nov 21, 2006 #1
    Dear all, I am trying to calculate the stresses and strains induced by a 40K change in temperature of a steel sheet of thickness 5mm, that is clad on both sides with 2mm thick layers of copper. For both materials E, alpha (í.e. the thermal expansion coefficient), as well as v (Poissons ratio are given).

    My attempt was equating the forces (see attached word document).

    This does unfortunately not work and the fact that the Poisson ratios are given makes me think that I have missed something out. Can anyone help?

    Thanks a million for any help, hints and suggestions.

    Alice
     

    Attached Files:

  2. jcsd
  3. Nov 21, 2006 #2
    I do not see why the temperature change would induce a stress in the specimen as it is free to expand? Could you provide the full question?
     
  4. Nov 21, 2006 #3

    Pyrrhus

    User Avatar
    Homework Helper

    where is the geometry?
     
  5. Nov 22, 2006 #4
    The questions says:

    A steel sheet of thickness 5cm is clad on both sides with 2mm thick layers
    of copper. Determine the stresses and strains induces by a 40K change in
    Temperature

    given Data:

    for steel: E=210kN/mm^2, v=0.3 (Poissons ratio), alpha=11*10^(-6) 1/K
    for copper: E =180 kN/mm^2, v=0.35, aplpha = 30*10^(-6) 1/K

    Solution: 70 N/mm^2, 87.5N/mm^2, 0.673 millistrain, 0.24millistrain, 1.77
    millistrain


    I thought there was geometry, since the steel is clad on top and bottom with 2mm thick layers of copper.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Stresses and strains in steel sheet
Loading...