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Homework Help: Bending & Shear Moment

  1. Aug 24, 2014 #1
    1. The problem statement, all variables and given/known data
    (a) Calculate the maximum bending moment
    (b) Calculate the maximum stress in the beam
    (c) At the point of maximum stress sketch a graph of the stress
    distribution through the thickness of the beam, indicating which are
    tensile and compressive stresses.
    (d) Determine the dimensions of the cross section which will minimise
    the maximum stress value if:
    • the cross sectional area of the beam can be increased by 20%
    • the beam section is to remain a solid rectangle
    • neither the breadth or depth of the beam section can be reduced
    below their original dimensions.
    Show the dimensions of the proposed beam cross section with the aid
    of a sketch

    Determine the percentage reduction of the maximum stress value
    when the new cross section is used.

    Attached Files:

    Last edited: Aug 24, 2014
  2. jcsd
  3. Apr 13, 2015 #2
    Hi, have you completed it. if so can you help me i got the same question
  4. Apr 13, 2015 #3


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Hi, Zimdo101:
    lalf posted this question in August of 2014. He's probably moved on to another course somewhere, and he never posted again to this thread.

    At PF, we discourage members from resurrecting old posts, a practice referred to as "necroposting".

    If you want help here at PF, please create your own thread and be sure to follow the Homework Template, which also includes showing your attempt at solving the problem.
  5. Jul 11, 2016 #4
    Hi has anyone completed this? I have completed first two,
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