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Homework Help: Stress Calculations

  1. Mar 24, 2014 #1
    1. I need to know the stress σ in the "y" direction.

    2. I will use σ=P/A equation.

    3. First (-2*10^6)N*0.4m=-0.8*10^6N
    Then σ=P/A=(-0.8*10^6N)/(0.4m*0.02m)=-100*10^6Pa.

    Is this corrects?

    Attached Files:

  2. jcsd
  3. Mar 24, 2014 #2
    Looks right to me.

    Some suggestions:
    -always carry the units through correctly to make sure you are doing it right; I think the first step you did missed the N/m
    -you probably don't need to convert everything to N and use *10^6 everywhere; it saves some time and probably less mistakes just to leave the M in there to the end;
    -a shortcut here is to just divide the distributed load by the width since a distributed load is sort of like the stress already in one dimension
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