Citation

Li Z, Ji C, Wang L. Comput. Methods Programs Biomed. 2018; 161: 181-189.

Affiliation

Hebei University of Engineering, Handan 056021, PR China. Electronic address: Fc8232@126.com.

Copyright

(Copyright © 2018, Elsevier Publishing)

DOI

10.1016/j.cmpb.2018.04.022

PMID

29852960

Abstract

BACKGROUND AND OBJECTIVE: Although analytical models have been used to quickly predict head response under impact condition, the existing models generally took the head as regular shell with uniform thickness which cannot account for the actual head geometry with varied cranial thickness and curvature at different locations. The objective of this study is to develop and validate an analytical model incorporating actual cranial thickness and curvature for child aged 0-1YO and investigate their effects on child head dynamic responses at different head locations.

METHODS: To develop the new analytical model, the child head was simplified into an irregular fluid-filled shell with non-uniform thickness and the cranial thickness and curvature at different locations were automatically obtained from CT scans using a procedure developed in this study. The implicit equation of maximum impact force was derived as a function of elastic modulus, thickness and radius of curvature of cranium.

RESULTS: The proposed analytical model are compared with cadaver test data of children aged 0-1 years old and it is shown to be accurate in predicting head injury metrics. According to this model, obvious difference in injury metrics were observed among subjects with the same age, but different cranial thickness and curvature; and the injury metrics at forehead location are significant higher than those at other locations due to large thickness it owns.

CONCLUSIONS: The proposed model shows good biofidelity and can be used in quickly predicting the dynamics response at any location of head for child younger than 1 YO.

Copyright © 2018 Elsevier B.V. All rights reserved.

Language: en

Keywords

Analytical model; Child head; Cranial thickness; Curvature; Dynamic response; Effect law