Strain and force

  • Thread starter Ry122
  • Start date
  • #1
565
2
If I know only the length of the beam, the young's modulus, and the cross sectional area, is there an equation that I can use to determine what amount of force would be required to lengthen a beam by a specified amount? The force is being applied to the beam axially.
 

Answers and Replies

  • #2
FredGarvin
Science Advisor
5,067
9
[tex]\delta = \frac{PL}{AE}[/tex]
 
  • #3
565
2
[tex]
\P = \frac{deltaAE}{L}
[/tex]

Using this with
delta=.4421207mm
E=200,000MPA
A=5776mm
L=701mm
The force is 728584640N
Doesn't this seem like too much?
 
  • #4
FredGarvin
Science Advisor
5,067
9
Check your units. Convert all of the mm to m.
 
  • #5
565
2
That's what I did. mm have prefix 10^-3
and Mega pascals has 10^6
 

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