Problem in calculating young mudulus

  • #1
Young moduls can be given as:

Y=(F/A)/(dL/L)
but in area i am confused because sometine for cylindrical shape it is taken as 2(pi)r*L and sometime simply (pi)r^2.
Please deffrientiate these cases:
 

Answers and Replies

  • #2
Doc Al
Mentor
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If the force is radial, then you need the surface area of the cylinder; if the force is axial, you need the cross-sectional area.
 

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