Table 1.

Material parameter table.

Model	Material parameter	Contribution	Value
Muscle (Röhrle et al., 2017)	$C_1^{\mathrm{\text{M}}}$	Isotropic	2.5 × 10−6 MPa
	$C_2^{\mathrm{\text{M}}}$	Isotropic	6 × 10−3 MPa
	$C_3^{\mathrm{\text{M}}}$	Anisotropic (passive)	1 × 10−3 MPa
	$C_4^{\mathrm{\text{M}}}$	Anisotropic (passive)	6 (–)
	Smax	Anisotropic (active)	0.1 MPa
	ΔWasc	Anisotropic (active)	0.15 (–)
	ΔWdsc	Anisotropic (active)	0.16 (–)
	νasc	Anisotropic (active)	2 (–)
	νdsc	Anisotropic (active)	4 (–)
	Λopt	Anisotropic (active)	1.3 (–)
	γM	-	0
	αM	-	0
Skin/Fat (Röhrle et al., 2017)	$C_1^{\mathrm{\text{S}}}$	Isotropic	2.5 × 10−6 MPa
	$C_2^{\mathrm{\text{S}}}$	Isotropic	6 × 10−3 MPa
	$C_3^{\mathrm{\text{S}}}$	Anisotropic (passive)	1 × 10−3 MPa
	$C_4^{\mathrm{\text{S}}}$	Anisotropic (passive)	6 (–)
	Smax	Anisotropic (active)	0.1 MPa
	ΔWasc	Anisotropic (active)	0.15 (–)
	ΔWdsc	Anisotropic (active)	0.16 (–)
	νasc	Anisotropic (active)	2 (–)
	νdsc	Anisotropic (active)	4 (–)
	Λopt	Anisotropic (active)	1.3 (–)
	γS	-	1
	αS	-	0
Liner (Łagan and Liber-Kneć, 2018)	$C_1^{\mathrm{\text{L}}}$	Isotropic	0.33 MPa
	$C_2^{\mathrm{\text{L}}}$	Isotropic	0.01 MPa
Femur (Zhang et al., 2013)	ρ (density)	-	1 × 10−3 g·mm−3
	E (Young's modulus)	-	1.5 × 104 MPa
	ν (Poisson ratio)	-	0.27
Socket (Zhang et al., 2013)	ρ (density)	-	1 × 10−3 g·mm−3
	E (Young's modulus)	-	1.0 × 104 MPa
	ν (Poisson ratio)	-	0.30

Parameters for the material model. Parameters for muscle and Skin/Fat were adapted from Röhrle et al. (2017).