A Numerical Investigation of Risk Factors Affecting Lumbar Spine Injuries Using a Detailed Lumbar Model

Table 4

Maximum principal strain of 16 simulations in DOE analysis.

Number	Velocity (mm/ms)	Cushion angle (°)	Coefficient of friction	Cushion thickness (mm)	Cushion density (kg/m^3)	Maximum principal strain (E-3)
1	0.5	10	0.9	140	20	4.08
2	0.5	20	0.6	20	40	5.17
3	0.7	20	0.3	60	20	4.6
4	0.1	20	0.9	100	30	2.97
5	0.5	30	0	60	30	2.72
6	0.5	0	0.3	100	50	3.43
7	0.3	20	0	140	50	3.22
8	0.1	30	0.3	140	40	2.51
9	0.7	0	0.6	140	30	5.14
10	0.1	0	0	20	20	3.82
11	0.1	10	0.6	60	50	3.99
12	0.7	30	0.9	20	50	6.08
13	0.3	10	0.3	20	30	4.21
14	0.3	0	0.9	60	40	3.29
15	0.3	30	0.6	100	20	2.36
16	0.7	10	0	100	40	5.7