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!

Help drawing Mohr's circle with rotated axis

  1. Mar 19, 2013 #1
    1. The problem statement, all variables and given/known data

    Plane stress in xy-plane. Use Mohr's Circle to find σx1 σy1 and τx1y1 if the XY axis is rotated counterclockwise θº

    I want to do my HW problem myself so I'll just put some sample values. If i know how to get this one, i'll know how to do the HW problem(s).
    (Units wont matter for this)

    σx = -45
    σy = -15
    τxy = -20 which makes τyx = 20
    θ = 100°

    2. Relevant equations
    τmax=R
    R = √((σxy)/2)2xy2
    center=σave= (σxy)/2


    3. The attempt at a solution
    center=σave= {[(-45)+(-15)]/2} = -30
    R=25
    Point A (-45,-20)
    Point B (-15,20)
    Using my book (Gere 8th), i was only able to get this far. Not sure if this is on the right track or not, but i'm stuck at this point. Don't know how to continue...
    How can I get σx1 σy1 and τx1y1 from here?
    33awgld.jpg
     
    Last edited by a moderator: Mar 19, 2013
  2. jcsd
  3. Mar 20, 2013 #2
    Problem Solved. I did it all by myself!
    23991469.jpg
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Help drawing Mohr's circle with rotated axis
  1. Mohr's Circle (Replies: 36)

  2. Mohr Circle (Replies: 1)

Loading...