Biomechanical behavior of brain injury caused by sticks using finite element model and Hybrid-III testing  

作　　者：Kui Li Jiawen wang Shengxiong Liu Sen Su Chenjian Feng Xiaoxiang Fan Zhiyong Yin 

机构地区：[1]Research Institute of Surgery/Daping Hospital, Third Military Medical University, Chongqing 400042, China [2]Department of Basic Medical Institute of Pathology, Fashan University, Fashan 528000, China [3]School of Pharmacy and Bioengineering, Chongqing University of Technology. Chongqing 400050, China

出　　处：《Chinese Journal of Traumatology》2015年第2期65-73,共9页中华创伤杂志（英文版）

基　　金：National Natural Science Foundation of China （No. 31200709 and 31170908）, and Academician Funds （No. cstc2012jjys0004）.

摘　　要：Objective： To study the biomechanical mechanism of head injuries beaten with sticks, which is common in the battery or assaultive cases.Methods： In this study, the Hybrid-III anthropomorphic test device and finite element model （FEM） of the total human model for safety （THUMS） head were used to determine the biomechanical response of head while being beaten with different sticks. Total eight Hybrid-III tests and four finite element simulations were conducted. The contact force, resultant acceleration of head center of gravity, intracranial pressure and von Mises stress were calculated to determine the different biomechanical behavior of head with beaten by different sticks.Results： In Hybrid-III tests, the stick in each group demonstrated the similar kinematic behavior under the same loading condition. The peak values of the resultant acceleration for thick iron stick group, thin iron stick group, thick wooden stick group and thin wooden stick group were 203.4 g, 221.1 g, 170.5 g and 122.2 g respectively. In finite element simulations, positive intracranial pressure was initially observed in the frontal comparing with negative intracranial pressure in the contra-coup site. Subsequently the intracranial pressure in the coup site was decreasing toward negative value while the contra-coup intracranial pressure increasing toward positive values.Conclusions： The results illustrated that the stiffer and larger the stick was, the higher the von Mises stress, contact force and intracranial pressure were. We believed that the results in the Hybrid-III tests and THUMS head simulations for brain injury beaten with sticks could be reliable and useful for better understanding the injury mechanism.

关 键 词：Biomechanics Head injury Sticks Hybrid-Ⅲ THUMS FEM 

分 类 号：U461.91[机械工程—车辆工程] R651.15[交通运输工程—载运工具运用工程]