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!

Young's modulus times second moment of area

  1. Mar 16, 2009 #1
    Good day,

    Im am wondering what you get when you determine the following of a bar during a bending experiment:

    (E x I) / y

    E = the Young's Modulus [kgf/mm^2]
    I = Second moment of area [mm^4]
    y = half of the bar height [mm]

    Is there a name for this term? And what does this term represent?

    Thanks in advance!
     
  2. jcsd
  3. Mar 16, 2009 #2

    Mapes

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    The reciprocal of this term is the magnitude of the normal strain at the surface per unit bending moment (because [itex]|\sigma_{\rm{max}}|=My/EI[/itex]). EI alone is called the flexural rigidity.
     
  4. Mar 17, 2009 #3
    Allright, thanks a lot.

    Then I have got one question left:

    In the formula:
    (M/I) = (E/R)

    What does "R" represent?
     
  5. Mar 17, 2009 #4

    Mapes

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    The radius of curvature of the bending beam.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Young's modulus times second moment of area
  1. Second Moment of Area (Replies: 3)

  2. Second Moment of Area (Replies: 4)

Loading...