quastion in Cont. Mechanics

Posted on 2011-10-04
Last Modified: 2012-05-12
On example 10.62  when he calculates d  , total length of the bar , why is he completely ignoring F = 15KN ? Since F is also an Axial force.

Any inputs would be appreciated.

Question by:c_hockland
    LVL 26

    Accepted Solution

    But he does not ignore it. In the equation at the bottom (signaF) it is the first tem after -R

    Author Comment

    thats on the FBD.

    But my question is when he calculates d = P*L / E*A

    where P is the axial force on the rod.
    LVL 84

    Assisted Solution

    where does he calculate d = P*L / E*A?

    Was P derived from R, who's equation involved F?

    Author Comment

    that integral there is d = PL/EA

    i dont understand why he drags that 45000 inside the integral.
    LVL 84

    Expert Comment

    The only integral I see is on Problem 10.61

    45000N = (75000 N/m)*0.8m - 15000N

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