Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Problem involving temp changes in stress and strain topic.

  1. Nov 26, 2012 #1
    image.jpg
    1. Knowing that a 0.5 mm gap exists when the temperature is 20 degree celsius,
    Determine the tempature at which the normal stress in the aluminum bar will be equal to -90 MPa,And the corresponding exact length of the aluminum bar.




    3. The attempt at a solution
    I am not familiar with this topic. Could anyone also show me some of their thing process . Thanks in advance.
     
  2. jcsd
  3. Nov 26, 2012 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Do you know how much expansion occurs in metals with temperature change?
    Hint: it involves alpha.

    Do you know how the length of a bar changes when an axial load is applied?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook