G'- Storage modulus (Elastic modulus)
G"- Loss modulus (Viscous modulus)
tan δ = G" / G' (viscous loss)
Equations are put together below, to build Young's Modulus as determined from a tensile experiment.
F, force
A0, cross-sectional area at the onset of the experiment
| s, stress |
|
ΔL, change in length as the experiment progresses
L0, length at the onset of the experiment
| e, strain |
|
| E, Young's Modulus |
|
A spring is compared to a dashpot. These are put together for elements such as the Maxwell element and the Voigt element.
|
A spring follows Hooke's Law. A spring is also called an elastic spring or a linear spring. |
|
A dashpot is filled with a Newtonian liquid. A dashpot is also called a viscous damper or a linear dashpot. |
|
|
|
|
|
|
σ, stress
ε, strain
E, Young's Modulus, "spring stiffness"
&#eta;, viscosity (of the Newtonian liquid in the dashpot)
|
A Maxwell Element is a dashpot and a springs in series.
|
|
A Voigt Element is a dashpot and a spring in parallel.
|
|
|
|
|
|
|
| D, Compliance |
|
| B, Bulk Modulus |
|
| B, Shear Modulus |
|
See also:
Elongation
Poisson's Ratio
Young's Modulus
