284 Chapter 10 Force and Force-Related Parameters
following manner. Starting with Hooke’s law, sEe, and substituting for sand the strain e,
in terms of their elementary definitions, we have(10.25)
Rearranging Equation (10.25) to solve for modulus of elasticityE, we have
(10.26)
where
Emodulus of elasticity (N/m
2
)Fthe applied force (N)
Loriginal length of the bar ( m)
Across-sectional area of the bar ( m
2
)xelongation, final length minus original length ( m)
E
FL
Ax
F
A
E
x
L
An example of a tensile test
machine.
Source:Courtesy of MTS
Systems Corporation62080_10_ch10_p251-302.qxd 5/22/10 12:32 AM Page 284
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