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Research Papers

Development of a Finite Element Human Head Model Partially Validated With Thirty Five Experimental Cases

[+] Author and Article Information
Haojie Mao

e-mail: hmao@wayne.edu

Liying Zhang

e-mail: lzang@wayne.edu
Bioengineering Center,
Wayne State University,
818 West Hancock,
Detroit, MI 48201

Binhui Jiang

Hunan University,
No. 1 Lushanna Road Changsha,
Hunan 410082, China
e-mail: jjhhzz123@163.com

Vinay V. Genthikatti

e-mail: ei5627@wayne.edu

Xin Jin

e-mail: mail.jinxin@gmail.com

Feng Zhu

e-mail: fengzhume@gmail.com

Rahul Makwana

e-mail: rahulmakwana25@gmail.com

Amandeep Gill

e-mail: amandeep171@gmail.com

Gurdeep Jandir

e-mail: gssaini13@gmail.com

Amrinder Singh

e-mail: amrinder703@gmail.com

King H. Yang

e-mail: king.yang@wayne.edu
Bioengineering Center,
Wayne State University,
818 West Hancock,
Detroit, MI 48201

1Corresponding author.

Contributed by the Bioengineering Division of ASME for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received July 19, 2012; final manuscript received June 22, 2013; accepted manuscript posted July 29, 2013; published online September 24, 2013. Assoc. Editor: Barclay Morrison.

J Biomech Eng 135(11), 111002 (Sep 24, 2013) (15 pages) Paper No: BIO-12-1302; doi: 10.1115/1.4025101 History: Received July 19, 2012; Revised June 22, 2013; Accepted July 29, 2013

This study is aimed to develop a high quality, extensively validated finite element (FE) human head model for enhanced head injury prediction and prevention. The geometry of the model was based on computed tomography (CT) and magnetic resonance imaging scans of an adult male who has the average height and weight of an American. A feature-based multiblock technique was adopted to develop hexahedral brain meshes including the cerebrum, cerebellum, brainstem, corpus callosum, ventricles, and thalamus. Conventional meshing methods were used to create the bridging veins, cerebrospinal fluid, skull, facial bones, flesh, skin, and membranes—including falx, tentorium, pia, arachnoid, and dura. The head model has 270,552 elements in total. Thirty five loading cases were selected from a range of experimental head impacts to check the robustness of the model predictions based on responses including the brain pressure, relative skull-brain motion, skull response, and facial response. The brain pressure was validated against intracranial pressure data reported by Nahum et al. (1977, “Intracranial Pressure Dynamics During Head Impact,” Proc. 21st Stapp Car Crash Conference, SAE Technical Paper No. 770922) and Trosseille et al. (1992, “Development of a F.E.M. of the Human Head According to a Specific Test Protocol,” Proc. 36th Stapp Car Crash Conference, SAE Technical Paper No. 922527). The brain motion was validated against brain displacements under sagittal, coronal, and horizontal blunt impacts performed by Hardy et al. (2001, “Investigation of Head Injury Mechanisms Using Neutral Density Technology and High-Speed Biplanar X-Ray,” Stapp Car Crash Journal, 45, pp. 337–368; and 2007, “A Study of the Response of the Human Cadaver Head to Impact,” Stapp Car Crash Journal, 51, pp. 17–80). The facial bone responses were validated under nasal impact (Nyquist et al. 1986, “Facial Impact Tolerance and Response,” Proc. 30th Stapp Car Crash Conference, SAE Technical Paper No. 861896), zygoma and maxilla impact (Allsop et al. 1988, “Facial Impact Response – A Comparison of the Hybrid III Dummy and Human Cadaver,” Proc. 32nd Stapp Car Crash Conference, SAE Technical Paper No. 881719)]. The skull bones were validated under frontal angled impact, vertical impact, and occipital impact (Yoganandan et al. 1995, “Biomechanics of Skull Fracture,” J Neurotrauma, 12(4), pp. 659–668) and frontal horizontal impact (Hodgson et al. 1970, “Fracture Behavior of the Skull Frontal Bone Against Cylindrical Surfaces,” 14th Stapp Car Crash Conference, SAE International, Warrendale, PA). The FE head model was further used to study injury mechanisms and tolerances for brain contusion (Nahum et al. 1976, “An Experimental Model for Closed Head Impact Injury,” 20th Stapp Car Crash Conference, SAE International, Warrendale, PA). Studies from 35 loading cases demonstrated that the FE head model could predict head responses which were comparable to experimental measurements in terms of pattern, peak values, or time histories. Furthermore, tissue-level injury tolerances were proposed. A maximum principal strain of 0.42% was adopted for skull cortical layer fracture and maximum principal stress of 20 MPa was used for skull diploë layer fracture. Additionally, a plastic strain threshold of 1.2% was used for facial bone fracture. For brain contusion, 277 kPa of brain pressure was calculated from reconstruction of one contusion case.

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Copyright © 2013 by ASME
Topics: Pressure , Brain
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Figures

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Fig. 1

The FE head model. (a) isometric view of the head model with brain exposed; (d) medium sagittal view of the head model; (g) skull and facial bones; (b) 11 bridging veins; (e) falx and tentorium; (h) brain; and (c),(f),(i) brain sectional views in three directions (horizontal, sagittal, and coronal).

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Fig. 5

Fracture pattern predicted by simulations for frontal impact

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Fig. 6

Force deflection in nasal impact

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Fig. 7

Fracture patterns for nasal impact

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Fig. 8

Force deflection in zygoma impacts

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Fig. 9

Force deflection in maxilla impacts

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Fig. 10

Coup intracranial pressure associated with contusion

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Fig. 2

Gradient brain pressure during frontal 45 deg angled blunt impact (Nahum et al. 1977; Case 37) and frontal quasi-horizontal impact (Trosseille et al. 1992; MS482_2)

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Fig. 3

Comparison of model-predicted brain pressure to experimental data (Trosseille et al. [31])

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Fig. 4

Brain motion for C383-T3

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