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Young’s s Modulus<br />
For materials whose length is much greater than the<br />
width or thickness, we are concerned with the<br />
longitudinal modulus of elasticity, or Young’s<br />
Modulus Y. Y<br />
Young ' s modulus<br />
<br />
longitudinal stress<br />
longitudinal strain<br />
Y<br />
<br />
F / A <br />
FL<br />
lb<br />
Units : Pa or<br />
L / L AL<br />
2<br />
in.