This Demonstration calculates and plots the stress relaxation curve of a Maxwell element subjected to a unit step stress described by the equation

where

is the dissipating stress at time

,

is the elastic component's modulus and

the viscosity. The element's relaxation time,

, is the ratio

, here with arbitrary time units. The Deborah number,

, is represented here by the ratio

, where

is the maximum value of the plot's time axis. The values of the parameters

,

, and

are entered with sliders. An ideogram of the Maxwell element (a spring-dashpot in series combination) is displayed above the plot. Also shown are the stress relaxation equation and the current calculated numeric values of

and

.