Table 2.

Viscoelastic material parameters of phantom materials M1 and M2 in Abaqus/CAE version 6.14-1. The frequency-dependent parameters for each material were provided as tabular data: ωR(h*) = E_l/E_∞, and ωI(h*) = 1 – E_s/E_∞, as function of f = ω/2π, where E_∞ is the long-term Young’s modulus.

	Density, ρ (kg/m3)	Poisson’s ratio, ν	Long-term Young’s modulus,	Frequency-dependent tabular parameters
			E∞ (kPa)	ωR{h*}	ωI{h*}
M	998	0.499	0.711	El/E∞	1 – Es/E∞
M2	998	0.499	9.969