Young's Modulus:
Young's Modulus also known as the Elasticity
Modulus of a material is the ratio of the stress versus the
strain within the Elastic region of the Stress-Strain diagram.
This is usually found from the slope of the
stress vs. strain curve.
Elasticity Modulus = Stress / Strain
This mechanical property for a given material
was named after Thomas Young, usually denoted by the symbol
E and have the units of Pascals (Pa) or GigaPascals (GPa).
This is a more generalized version of the Hook's law, similar
to the spring constant. A high Young's modulus means
that the material is stiffer.
The Approximate values for the Young's Modulus
of various materials is given in the table below:
|
Material
|
E (GPa)
|
| Beeswax |
0.2 |
| PTFE (Teflon) |
0.5 |
| Polycarbonate polymer |
2.4 |
| Pine wood (along grain) |
10.0 |
| Aluminum metal |
70.0 |
| Fused silica glass |
75.0 |
| Titanium metal |
107.0 |
| Brass alloy |
110.0 |
| Stainless steel 304 |
207.0 |
| Silicon nitride |
290.0 |
| Alumina (Al2O3) |
370.0 |
| Diamond |
1140.0 |
Density
