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Maximum stress as percentage of Yield Strength

  1. Jun 20, 2015 #1
    1. The problem statement, all variables and given/known data
    Hi guys,

    I have a question here, which asks me to express the maximum stress from my simply supported beam, which I worked out to be 1.165MPa, to be expressed as a percentage of the Yield strength 95MN/m^2.

    I also have a follow on from that which asked me how much the cross-sectional wall thickness must be increased by so that the max stress is 40% of the yield strength.

    Could someone else explain how to work this out to me please?

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Jun 20, 2015 #2

    PhanthomJay

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    You will first have to show how you calculated the max stress. Your numbers show that max stress is only about 1% of yield stress, so wall thickness would decrease to get max stress of 40% yield. Please show your work.
     
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