Table 1.

A summary of the material properties of the head model components used in this study

Tissue	Young’s modulus (MPa)	Density (Kg/dm3)	Poisson’s ratio
Outer compact bone	15,000	2.00	0.22
Inner compact bone	15,000	2.00	0.22
Porous bone	1000	1.30	0.24
Neck bone	1000	1.30	0.24
Cerebrospinal fluid	$K=2.1$ GPa	1.00	–
Brain	Hyper-viscoelastic fiber-reinforced GOH (see Table 3)
Sinuses	$K=2.1$ GPa	1.00	–
Dura mater	31.5	1.13	0.45
Falx	31.5	1.13	0.45
Tentorium	31.5	1.13	0.45
Pia mater	11.5	1.13	0.45
Scalp	Viscoelastic	1.13	0.42
Bridging veins	EA $=1.9$ N	–	–

The capital letter K represents the Bulk Modulus while EA means force/unit strain. The brain is assigned a hyper-viscoelastic fiber-reinforced anisotropic material