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Youngs modulus of elesticity

by MMCS
Tags: elesticity, modulus, youngs
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MMCS
#1
Mar9-12, 08:41 AM
P: 144
I am trying to calculate youngs modulus of elasticity for results from a tensile test but cant seem to get a figure close to that of the common figure for the material

Material 0.1% carbon steel
Area = 20 x 10-6
Yield force = 6009N
Length increase at yield force = 0.537mm = 0.000537m
Original length = 25.6mm = 0.0256m


E = σ/ε

E = (6006/20x10-6) / (0.000537/0.0256)
E = 14.32 x 109
Typical value = 207 x 109

Iv obviously went very wrong somewhere but i dont know where

Thanks
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Camille
#2
Mar9-12, 09:31 AM
P: 19
Your calculations seem fine, what is the unit of the area? You can also make sure that the force is in N, not in kN or something.
MMCS
#3
Mar9-12, 09:35 AM
P: 144
The unit of area is m^2, and the force was 6.009 KN so 6009 N. Its way off the typical value though, it doesnt make sense?


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