TY - JOUR
T1 - Finite element analysis of the effect of motorcycle helmet materials against impact velocity
AU - Chang, Li Tung
AU - Chang, Guan Liang
AU - Huang, Ji Zhen
AU - Huang, Shyh Chour
AU - Liu, De Shin
AU - Chang, Chih Han
N1 - Funding Information:
This study was supported by the National Science Council of the Republic of China (NSC-89-2218-E-041-004-) We deeply appreciate the National Bureau of Standard Inspection in Tainan for providing the equipment for the shock absorption performance tests.
PY - 2003
Y1 - 2003
N2 - A motorcycle helmet is the best protective headgear for the prevention of head injuries caused by direct cranial impact. A finite element model based on realistic geometric features of a motorcycle helmet is established, and explicit finite element LS-DYNA code is employed to simulate dynamic responses at different impact velocities. Peak acceleration and Head Injury Criterion values derived from the headform are used to assess the protective performance of the helmet. We have concluded that the dynamic responses of the helmet dramatically vary with impact velocity, as well as the mechanical properties of the outer shell and energy-absorbing liner. At low velocities, e.g., less than 8.3 m/s, the shell stiffness and liner density should be relatively low to diminish head-contact force. At high velocity, e.g., 11.1 m/s, a stiffer shell and denser liner offer superior protection against head injuries.
AB - A motorcycle helmet is the best protective headgear for the prevention of head injuries caused by direct cranial impact. A finite element model based on realistic geometric features of a motorcycle helmet is established, and explicit finite element LS-DYNA code is employed to simulate dynamic responses at different impact velocities. Peak acceleration and Head Injury Criterion values derived from the headform are used to assess the protective performance of the helmet. We have concluded that the dynamic responses of the helmet dramatically vary with impact velocity, as well as the mechanical properties of the outer shell and energy-absorbing liner. At low velocities, e.g., less than 8.3 m/s, the shell stiffness and liner density should be relatively low to diminish head-contact force. At high velocity, e.g., 11.1 m/s, a stiffer shell and denser liner offer superior protection against head injuries.
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U2 - 10.1080/02533839.2003.9670838
DO - 10.1080/02533839.2003.9670838
M3 - Article
AN - SCOPUS:0344549766
VL - 26
SP - 835
EP - 843
JO - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers
JF - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers
SN - 0253-3839
IS - 6
ER -