首页|Quantitative analysis of the protective performance of bicycle helmet with multi-direction impact protection system in oblique impact tests

Quantitative analysis of the protective performance of bicycle helmet with multi-direction impact protection system in oblique impact tests

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Purpose:The current study aimed to assess the protective performance of helmets equipped with multi-directional impact protection system(MIPS)under various oblique impact loads.Methods:Initially,a finite element model of a bicycle helmet with MIPS was developed based on the scanned geometric parameters of an actual bicycle helmet.Subsequently,the validity of model was confirmed using the KASK WG11 oblique impact test method.Three different impact angles(30°,45°,and 60°)and 2 varying impact speeds(5 m/s and 8 m/s)were employed in oblique tests to evaluate protective performance of MIPS in helmets,focusing on injury assessment parameters such as peak linear acceleration(PLA)and peak angular acceleration(PAA)of the head.Results:The results demonstrated that in all impact simulations,both assessment parameters were lower during impact for helmets equipped with MIPS compared to those without.The PAA was consistently lower in the MIPS helmet group,whereas the difference in PLA was not significant in the no-MIPS helmet group.For instance,at an impact velocity of 8 m/s and a 30° inclined anvil,the MIPS helmet group exhibited a PAA of 3225 rad/s2 and a PLA of 281 g.In contrast,the no-MIPS helmet group displayed a PAA of 8243 rad/s2 and a PLA of 292 g.Generally,both PAA and PLA parameters decreased with the increase of anvil angles.At a 60° anvil angles,PAA and PLA values were 664 rad/s2 and 20.7 g,respec-tively,reaching their minimum.Conclusion:The findings indicated that helmets incorporating MIPS offer enhanced protection against various oblique impact loads.When assessing helmets for oblique impacts,the utilization of larger angle anvils and rear impacts might not adequately evaluate protective performance during an impact event.These findings will guide advancements in helmet design and the refinement of oblique impact test protocols.

Oblique impactMulti-direction impact protection systemWG11 oblique impact testAngular acceleration

Yong Han、Hao Yang、He Wu、Di Pan、Bing-Yu Wang

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School of Mechanical and Automotive Engineering,Xiamen University of Technology,Xiamen,361024,Fujian province,China

Fujian Key Laboratory of Bus Advanced Design and Manufacturing,Xiamen,361024,Fujian province,China

School of Aerospace Engineering,Xiamen University,Xiamen,361005,Fujian province,China

Natural Science Foundation Project of Xiamen City,ChinaFujian Provincial Technological Innovation Key Research and Industry Development ProjectFujian Provincial Technological Innovation Key Research and Industry Development Project

3502Z202272232022G432023G048

2024

10.1016/j.cjtee.2024.03.002

中华创伤杂志(英文版)
中华医学会

中华创伤杂志(英文版)

CSTPCD
影响因子：0.608
ISSN：1008-1275
年,卷(期)：2024.27(4)
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