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Homework Help: Stress concentration

  1. Jun 18, 2008 #1
    1. The problem statement, all variables and given/known data

    Square panel , elliptical hole, uniform pressure p in x direction. calc stress at end of minor axis. pt A

    L=40in p=10psi a=1in b=0.5 in t=0.2 in

    2. Relevant equations

    i know that stress at end will be max stress multiplied by stress conc. factor.
    bt i dont know how to calc stress conc. factor for an elliptical hole

    3. The attempt at a solution

    Kt = stress x (1 + 2b/a)

    is this correct?

    Attached Files:

  2. jcsd
  3. Jun 18, 2008 #2


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    Science Advisor
    Homework Helper

    Can't read the diagram but it's normally 1+2(a/b) where a is the length and b is the width.
    So as the width gets smaller or the length is longer - the concentration gets bigger!

    Alternatively it's sqrt(crack_length/radius)
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