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http://dx.doi.org/10.7842/kigas.2013.17.5.37

A Study on the Strength of the Helmets with a Lobe in the Summit  

Kim, Chung Kyun (Research Center for Tribology, Mechatronics and Energy Technology Hongik University)
Publication Information
Journal of the Korean Institute of Gas / v.17, no.5, 2013 , pp. 37-41 More about this Journal
Abstract
This paper presents the strength safety of stress and deformation behaviors using the finite element method as a function of the thickness of the protective helmets with and without an extruder on the top of the shell structure. The helmet that would provide head and neck protections without causing discomfort to the user when it was worn for long periods of time should be manufactured for increasing the safety and impact energy absorption. The stress analyzed results show that when the impulsive force of 4,540N is applied on the top surface of a helmet, the safe thickness is 3.7mm for the conventional helmet and 3.2mm for the modified new helmet. Based on the deformation analysis, the FEM results recommend that the safe thickness is 3.2mm for the conventional helmet and 2.0mm for the modified new helmet. Thus, it may be more safe design of the helmet, which has an extruded structure on the summit surface of the helmet.
Keywords
helmets; strength safety; extruder; von Mises stress; deformation; FEM;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Chung Kyun Kim and Do Hyun Kim, "Numerical Study on the Strength Safety and Displacement Behaviors of a Helmet," J. of the KIGAS, 12(4), 34-40, (2008)   과학기술학회마을
2 Chung Kyun Kim, "On the Damping Effects of Helmet Safety with a Corrugation Damper using Taguchi's Optimization Design," J. of the KIGAS, 12(4), 41-45, (2008)   과학기술학회마을
3 "MARC user's manual," Ver. K6.1, MARC Analysis Research Co., (1996)
4 Protective helmets standard, MOEL, (1997. 12. 29)
5 NFPA standards 1971-2000, National Fire Protection Association, (2007)