Design And Fabrication Of A Tropical Motorcycle Helmet
The present work is devoted to the design and evaluation of a new crashworthy motorcycle helmet taking into consideration the tropical climate of Malaysia. A multidiscipline literature review on the design problems of motorcycle helmet was carried out and current problems were formulated. Based o...
| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2003
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/12220/1/FK_2003_3_.pdf |
| _version_ | 1825945012065533952 |
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| author | Shuaeib, Farag Mohamed |
| author_facet | Shuaeib, Farag Mohamed |
| author_sort | Shuaeib, Farag Mohamed |
| collection | UPM |
| description | The present work is devoted to the design and evaluation of a new crashworthy
motorcycle helmet taking into consideration the tropical climate of Malaysia. A multidiscipline
literature review on the design problems of motorcycle helmet was carried
out and current problems were formulated. Based on the literature review findings, a
new shell and liner designs were then proposed to overcome or eliminate these
problems.
The shell design improvements consisted of developing hybrid natural fiber
composite (NFC) shells which were fabricated and evaluated by the standard dynamic
penetration test. The results of the new design were found to be satisfactory according to the related helmet standards. Three additional methods have been developed to assess
the new shells performance in a more quantified manner. These tests are the helmet
quasi-static penetration, the helmet rigidity, and the helmet crushing. All these tests
were performed and the results confirmed the superior performance of the new natural
fiber shell helmets as compared to the market dominant ABS shell helmets. Other
factors also supported this design improvement such as cost, and the utilization of
environmental friendly material.
In the liner design improvement, the shell was kept to the current ABS shell and
the EPP foam as a liner. A 3D finite element algorithm has been developed using LSDYNA-
3D software. Based on the simulation results, the helmet with EPP foam liner
was found to be satisfactory according to the related helmet standards. A parametric
study of the helmet design was performed using the Response Surface Methodology in
the Design of Experiment (DOE) statistical method. From this parametric study, the
foam thickness and the foam density were found to have more significant effect on the
helmet energy absorption than the she]] effects. Design optimizations were also
conducted and optimum design was obtained.
Finally, thermal analysis for commercially available helmet without ventilation
system and the new helmet design with ventilation system were made. from which it
was found that helmet ventilation is essential to avoid possible health problems. A
design chart for helmet with ventilation system to obtain the minimum cross sectional
area required for ventilation nozzles has been developed. This chart is suitable for a wide span of amounts of heat generated from the motorcyclist head. The effect of
adding the ventilation system to the helmet has been structurally investigated by the
finite element simulation and found to positively improve the energy absorption
performance of the helmet. |
| first_indexed | 2024-03-06T07:24:52Z |
| format | Thesis |
| id | upm.eprints-12220 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-09-25T03:33:01Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | upm.eprints-122202024-07-04T07:18:29Z http://psasir.upm.edu.my/id/eprint/12220/ Design And Fabrication Of A Tropical Motorcycle Helmet Shuaeib, Farag Mohamed The present work is devoted to the design and evaluation of a new crashworthy motorcycle helmet taking into consideration the tropical climate of Malaysia. A multidiscipline literature review on the design problems of motorcycle helmet was carried out and current problems were formulated. Based on the literature review findings, a new shell and liner designs were then proposed to overcome or eliminate these problems. The shell design improvements consisted of developing hybrid natural fiber composite (NFC) shells which were fabricated and evaluated by the standard dynamic penetration test. The results of the new design were found to be satisfactory according to the related helmet standards. Three additional methods have been developed to assess the new shells performance in a more quantified manner. These tests are the helmet quasi-static penetration, the helmet rigidity, and the helmet crushing. All these tests were performed and the results confirmed the superior performance of the new natural fiber shell helmets as compared to the market dominant ABS shell helmets. Other factors also supported this design improvement such as cost, and the utilization of environmental friendly material. In the liner design improvement, the shell was kept to the current ABS shell and the EPP foam as a liner. A 3D finite element algorithm has been developed using LSDYNA- 3D software. Based on the simulation results, the helmet with EPP foam liner was found to be satisfactory according to the related helmet standards. A parametric study of the helmet design was performed using the Response Surface Methodology in the Design of Experiment (DOE) statistical method. From this parametric study, the foam thickness and the foam density were found to have more significant effect on the helmet energy absorption than the she]] effects. Design optimizations were also conducted and optimum design was obtained. Finally, thermal analysis for commercially available helmet without ventilation system and the new helmet design with ventilation system were made. from which it was found that helmet ventilation is essential to avoid possible health problems. A design chart for helmet with ventilation system to obtain the minimum cross sectional area required for ventilation nozzles has been developed. This chart is suitable for a wide span of amounts of heat generated from the motorcyclist head. The effect of adding the ventilation system to the helmet has been structurally investigated by the finite element simulation and found to positively improve the energy absorption performance of the helmet. 2003-07 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/12220/1/FK_2003_3_.pdf Shuaeib, Farag Mohamed (2003) Design And Fabrication Of A Tropical Motorcycle Helmet. Doctoral thesis, Universiti Putra Malaysia. Motorcycle helmets Strength of materials English |
| spellingShingle | Motorcycle helmets Strength of materials Shuaeib, Farag Mohamed Design And Fabrication Of A Tropical Motorcycle Helmet |
| title | Design And Fabrication Of A Tropical Motorcycle Helmet |
| title_full | Design And Fabrication Of A Tropical Motorcycle Helmet |
| title_fullStr | Design And Fabrication Of A Tropical Motorcycle Helmet |
| title_full_unstemmed | Design And Fabrication Of A Tropical Motorcycle Helmet |
| title_short | Design And Fabrication Of A Tropical Motorcycle Helmet |
| title_sort | design and fabrication of a tropical motorcycle helmet |
| topic | Motorcycle helmets Strength of materials |
| url | http://psasir.upm.edu.my/id/eprint/12220/1/FK_2003_3_.pdf |
| work_keys_str_mv | AT shuaeibfaragmohamed designandfabricationofatropicalmotorcyclehelmet |