Research on Neck Response of Elderly Drivers in Rear Collision

Table 6

Damage analysis of different horizontal distances between head and headrest.

Horizontal distance/mm	Max stress of cortical/MPa	Max stress of cancellous/MPa	Max intervertebral disc stress/MPa	Peak acceleration of head center of mass/g
0	347.28	6.75	43.1	1.05
10	437	7.41	39.7	0.99
20	442	7.6	41.4	0.92
30	460	7.65	39	0.91
40	455.3	7.62	38.7	0.93
50	384.6	7.66	43.3	0.88
60	390.6	7.53	48	0.81
70	387.67	7.94	56.9	0.86
80	412.1	7.75	61.4	0.82