Results 1 to 2 of 2

Thread: Strength of materials question (elastic curve)

  1. #1
    Jun 2006

    Strength of materials question (elastic curve)

    I understand how the problem is solved, the only issue I have is I don't understand how they are getting the units. As in how did they figure out it was kip*ft^3?

    Attached Thumbnails Attached Thumbnails Strength of materials question (elastic curve)-elastic.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Jul 2008

    Simple - The book's got the units wrong ...

    Simple - The book's got the units wrong ...

    ... if it's as simple a "units" problem as it looks.

    It happens, typos in manuscripts - or the author had a brain-fart that day; just 'cos it's in print and you might have paid a lot for it (it looks like an expensive book) doesn't mean everything in it is right.

    If I understand it, the question's asking for the shape of the curve of the beam. If the "independent" variable x is in feet, then so is v - the deflection along any chosen point (presumably) on the curved beam (well, thinking about it a bit, probably only any chosen point to the left of the ?roller? bearing).

    Do you happen to know, as you seem to be in this field, if any preferably simple combination of moments/forces applied to a rod will constrain its shape accurately to that of a parabola? I was thinking of working it out "backwards" - working out the (sum of) moment(s) that would be required to produce y = x, and in addition trying to use the exact formula for the curvature, ie: /ds where is the angle subtended by element of arc-length ds. Then trying to figure out if any possible (again preferably simple) arrangements of real physical moment(s) can be arranged so as to be equal to the (sum of) moment(s) calculated.

    Toodle pip.
    Dennis Revell.
    Last edited by mathwimp; Dec 3rd 2008 at 08:51 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: Feb 9th 2011, 12:51 PM
  2. [SOLVED] Probability: trains containing hazardous materials
    Posted in the Advanced Statistics Forum
    Replies: 8
    Last Post: Oct 15th 2010, 11:54 AM
  3. Elastic and non-elastic collision
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: Jun 22nd 2009, 07:18 AM
  4. Materials to Make a Tent
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: Sep 24th 2008, 05:14 AM
  5. Dimensions and materials of a capacitor
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: Aug 4th 2007, 10:38 AM

Search Tags

/mathhelpforum @mathhelpforum