For a slowly varying load with $\omega\tau\ll1$, the <dashpot> <stress> is small relative to the <spring> <stress>. The <strain> approaches $\sigma/E$ almost in <phase>, so \b[the low-frequency response is predominantly elastic]. A constant load approaches the finite equilibrium <strain> $\sigma_0/E$; it does not sustain steady viscous flow in this parallel network.

Solution

Past exam of the materials science course of the University of Cambridge / 2015 / Paper 1 / 5 / d / ii / Solution

 Solution (source code)