Numerical simulation of the mechanism of traumatic brain injury induced by blast shock waves

LI Zhijie; YOU Xiaochuan; LIU Zhanli; DU Zhibo; ZHANG Yi; YANG Ce; ZHUANG Zhuo

doi:10.11883/bzycj-2018-0348

Volume 40 Issue 1

Jan. 2020

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LI Zhijie, YOU Xiaochuan, LIU Zhanli, DU Zhibo, ZHANG Yi, YANG Ce, ZHUANG Zhuo. Numerical simulation of the mechanism of traumatic brain injury induced by blast shock waves[J]. Explosion And Shock Waves, 2020, 40(1): 015901. doi: 10.11883/bzycj-2018-0348

Citation:

LI Zhijie, YOU Xiaochuan, LIU Zhanli, DU Zhibo, ZHANG Yi, YANG Ce, ZHUANG Zhuo. Numerical simulation of the mechanism of traumatic brain injury induced by blast shock waves[J]. Explosion And Shock Waves, 2020, 40(1): 015901. doi: 10.11883/bzycj-2018-0348

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Numerical simulation of the mechanism of traumatic brain injury induced by blast shock waves

doi: 10.11883/bzycj-2018-0348

1.
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
2.
Daping Hospital, Army Medical University, Chongqing 400038, China

Received Date: 2018-09-14
Rev Recd Date: 2018-10-12

Available Online: 2019-10-25

Publish Date: 2020-01-01

Abstract

Abstract

Blast-induced traumatic brain injury (b-TBI) is a signature injury in the current military conflicts. However, the relevant mechanism of injury has not been fully elucidated. In this paper, numerical simulation study is carried out to investigate the dynamic response of brain injury mechanics during the blast loading. Firtstly, the 3D numerical head model is established based on magnetic resonance imaging (MRI) of the human head, whose physiological characteristics and detailed structures are included. The numerical model is adopted to simulate the head collision and the results are in good agreement with the experimental data, demonstrating the validity of the numerical model. Based on the coupled Eulerian-Lagrangian (CEL) theory, a fluid-solid coupling model of explosive shock wave-head is developed. The coupled model is used to simulate the situation of head subjected to frontal impacts by explosion shock wave. The dynamic response of the head is analyzed from the pressure distribution of flow field, brain pressure, skull deformation and acceleration. The peak pressure of explosion shock wave increases 3.5 times as much as that of incident wave under fluid-structure interaction, resulting in high-frequency vibration of skull and brain tissue at the site of direct shock. The corresponding vibration frequency is as high as 8 kHz, which is completely different from the dynamic response of brain tissue under head collision. At the same time, the local bending deformation will “propagate” along the skull, affecting the whole skull configuration, which determines the evolution process of brain tissue pressure and injury.
- 3D head model,
- blast shock waves,
- traumatic brain injury,
- fluid-structure interaction

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References(31)

References

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