Development and Validation of an Age-Specific Lower Extremity Finite Element Model for Simulating Pedestrian Accidents

Table 2

The long bone material properties of lower extremity model.

	Material parameters	The young (30 YO)	The elderly (70 YO)
Femoral cortical bone	Density (kg/m^3)	2000	2000
	Elastic modulus (MPa)	16.2	13.9
	Poisson’s ratio	0.3	0.3
	Yield stress	100.22	94.4
	Limit strain	0.032	0.019
Tibial cortical bone	Density (kg/m^3)	2000	2000
	Elastic modulus (MPa)	18.3	15.7
	Poisson’s ratio	0.3	0.3
	Yield stress	120.3	113.28
	Limit strain	0.034	0.020
Femur cancellous bone	Density (kg/m^3)	1000	1000
	Elastic modulus (MPa)	752	816.4
	Poisson’s ratio	0.45	0.45
	Yield stress	13.25	10.22
	Limit strain	0.134	0.134
Tibial cancellous bone	Density (kg/m^3)	1000	1000
	Elastic modulus (MPa)	752	591.6
	Poisson’s ratio	0.45	0.45
	Yield stress	11.04	8.24
	Limit strain	0.134	0.134