- #1
MrJoseBravo
- 10
- 0
Homework Statement
http://prntscr.com/7rw2hj
Homework Equations
deformation = PL/AE
A= pi/4 (d^2)
The Attempt at a Solution
The displacement of the shaft is equal to the summation of the displacement of each individual piece. I started on end A, and got the internal force to be 6kips
then
deformation at AB ~ 6x50/(9pi/4 x 18x10^3)
= .0024 in
for the middle shaft i got the internal force to be 2 Kips ( this could be where i am wrong, I am not completely sure I am doing these FBD's right.
deformation at BC ~ 2x75/(pi x 18x10^3) ( the 4's cancel out)
= .026
internal load at CD is 1Kip
deformation at CD ~ 60/(pi/4 x 18x10^3)
= .042
for the last two calculations, i believe they are off by a power of 10...and i can't figure out why.
I have attached my FBD's also, thanks in advance