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Complex loading systems.

  1. Nov 11, 2008 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    I missed a day at college last week when i was off sick due to tonsilitis. I recieved some homework today and it is going to be similar to a test next week. I really need to know how to do this and the lecturer has not been very helpful either.

    A) I have a rectangular cross-section bar that is, 100mm x 40mm square and 500mm long. This is subjected to an axial tensile load of 210kN.

    From this information i need to determine.
    1) The axial strain.
    2) The lateral strain.
    3) The changes in cross sectional dimensions.

    The material has a modulus of elasticity 80GPa, and poissons ratio of 0.25.

    B) A bar of circular cross-section is subjected to a tensile load of 210kN, which is within the elastic range. The bar is made from a steel with 80GPa and Poissons ration = 0.25, it has a diameter of 25mm and 0.8m long. Determine the extension of the bar and the decrease in diameter..

    Please give me as much help as you can as i am finding this very confusing, all help is appreciated.
  2. jcsd
  3. Nov 11, 2008 #2


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  4. Nov 11, 2008 #3


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  5. Nov 17, 2008 #4
    Thanks for the help, i should be able to make an attempt now at least. :)
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