1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: How to find max shear stress at a given point?

  1. Aug 14, 2014 #1
    The state of plane-stress at a point is given by σx = -200 MPa, σy = 100 MPa, σxy = 100 MPa
    The Maximum shear stress (in MPa) is:
    A) 111.8
    B) 150.1
    C) 180.3
    D) 223.6
    Explain Procedure also with Answer.

    Attempt: i already used Max Shear Stress τ = QV/ib, then also answer is not matching to given 4 options.
  2. jcsd
  3. Aug 14, 2014 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member
    2017 Award

    Could you be a bit more specific with your attempt. What did you do and why? What numbers did you insert into the equations? What was your end result?
  4. Aug 14, 2014 #3
    Suppose you have a plane perpendicular to the x-y plane, and this plane makes an angle of theta with the x- axis. Do you know how to determine the normal and shear stresses acting on that plane?

  5. Aug 14, 2014 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    It's not clear how you could use τ = QV/ib given only stress information. The problem seems suited for Mohr's circle.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted