Viscosity01

Viscous Damper

The damping force is defined as a function of velocity (or strain rate, depends on what the input is). This material model does not respond to strain/displacement. To represent materials that respond to both displacement and velocity, see Maxwell and Kelvin.

See this example.

See also damper elements Damper01 and Damper02.

$$\sigma=\text{sign}(\dot\varepsilon)~\eta~|\dot\varepsilon|^\alpha.$$

The damping coefficient is constant.

Syntax

material Viscosity01 (1) (2) (3)
# (1) int, unique tag
# (2) double, alpha
# (3) double, damping coefficient