國立虎尾科技大學 |

The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance./
Author:	Rubango, Kenneth.
Description:	1 online resource (51 pages)
Notes:	Source: Masters Abstracts International, Volume: 57-04.
Subject:	Biomechanics. -
Online resource:	click for full text (PQDT)
ISBN:	9780355579185

The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance.
Rubango, Kenneth.

The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance. - 1 online resource (51 pages)

Source: Masters Abstracts International, Volume: 57-04.

Thesis (M.S.)--Duke University, 2018.

Includes bibliographical references

Road accidents are the leading cause of death within the 15-29 years age range worldwide and the risk of death for motorcyclists is 20 times that of car occupants. As such, 31% of over 10,250 annual road traffic deaths in Uganda are due to either 2 or 3-wheeler motorists' accidents. Another study in Uganda revealed that 71% of its motorcycle crash victims sustained a head injury while more research shows that helmets can reduce risk of death by 37% and risk of head injury by 69% in the event of a crash. Unfortunately, helmet-use compliance is 30.8% and 1% compliance for riders and passengers respectively in Uganda. Market research by Design without Borders and the Uganda Helmet Vaccine Initiative, attributes this low helmet-use to discomfort, poor helmet ventilation and the prohibitive price of the helmets. A large part of the prohibitive helmet price is due to onerous performance requirements which drive up the development and manufacturing costs. One such requirement is ensuring the helmet's optimal performance in temperatures as low as -20° Celsius which are atypical in tropical climate regions. Another is that the helmet withstands multiple identical impacts at exactly the same location which is extremely rare in a crash. This Masters research is concerned with investigating the effect of continuity and thickness of motorcycle helmet shells on performance. Helmeted head impacts were simulated at three impact points using two different impact surfaces while varying shell thicknesses and continuity using LS DYNA, a Finite Element Analysis software. Increase in shell thickness reduced motorcycle helmet performance while splitting the shell in halves did not significantly affect motorcycle helmet performance. Insights from this research will inform and guide the engineering design of affordable market approved, better ventilated motorcycle helmets under 10 USD that will be suited for the Tropics.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355579185Subjects--Topical Terms:

565307
Biomechanics.
Index Terms--Genre/Form:

554714
Electronic books.

The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance.
LDR:03048ntm a2200313K 4500 001 915336
005 20180727125213.5
006 m o u
007 cr mn||||a|a||
008 190606s2018 xx obm 000 0 eng d
020 $a 9780355579185
035 $a (MiAaPQ)AAI10641143
035 $a (MiAaPQ)duke:14378
035 $a AAI10641143
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a Rubango, Kenneth. $3 1188659
245 1 4 $a The Effect of Thickness and Continuity of Motorcycle Helmet Shells on Performance.
264 0 $c 2018
300 $a 1 online resource (51 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 57-04.
500 $a Adviser: William M. Reichert.
502 $a Thesis (M.S.)--Duke University, 2018.
504 $a Includes bibliographical references
520 $a Road accidents are the leading cause of death within the 15-29 years age range worldwide and the risk of death for motorcyclists is 20 times that of car occupants. As such, 31% of over 10,250 annual road traffic deaths in Uganda are due to either 2 or 3-wheeler motorists' accidents. Another study in Uganda revealed that 71% of its motorcycle crash victims sustained a head injury while more research shows that helmets can reduce risk of death by 37% and risk of head injury by 69% in the event of a crash. Unfortunately, helmet-use compliance is 30.8% and 1% compliance for riders and passengers respectively in Uganda. Market research by Design without Borders and the Uganda Helmet Vaccine Initiative, attributes this low helmet-use to discomfort, poor helmet ventilation and the prohibitive price of the helmets. A large part of the prohibitive helmet price is due to onerous performance requirements which drive up the development and manufacturing costs. One such requirement is ensuring the helmet's optimal performance in temperatures as low as -20° Celsius which are atypical in tropical climate regions. Another is that the helmet withstands multiple identical impacts at exactly the same location which is extremely rare in a crash. This Masters research is concerned with investigating the effect of continuity and thickness of motorcycle helmet shells on performance. Helmeted head impacts were simulated at three impact points using two different impact surfaces while varying shell thicknesses and continuity using LS DYNA, a Finite Element Analysis software. Increase in shell thickness reduced motorcycle helmet performance while splitting the shell in halves did not significantly affect motorcycle helmet performance. Insights from this research will inform and guide the engineering design of affordable market approved, better ventilated motorcycle helmets under 10 USD that will be suited for the Tropics.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Biomechanics. $3 565307
655 7 $a Electronic books. $2 local $3 554714
690 $a 0648
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Duke University. $b Biomedical Engineering. $3 1187200
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10641143 $z click for full text (PQDT)