Parameter study of neck force in restrained 3 year old child involved in vehicle side impact

Child casualties and fatalities due to motor vehicle crashes are an increasing concern. In side impact crashes, the investigation of neck forces pertaining to Child Restraint System design, misuse and crash parameters are yet unexplored due to modelling constraints and experimental limitations. In t...

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Main Authors:	Shasthri, Sevaguru, Venkatason, Kausalyah, Shah, Qasim Hussain, Abdullah, Kassim Abdulrahman, Idres, Moumen, Wong , Sha Voon
Format:	Article
Language:	English
Published:	AENSI Publisher 2014
Subjects:	TL1 Motor vehicles
Online Access:	http://irep.iium.edu.my/39177/ http://irep.iium.edu.my/39177/ http://irep.iium.edu.my/39177/1/145-154.pdf

id	iium-39177
recordtype	eprints
spelling	iium-391772014-11-13T06:18:39Z http://irep.iium.edu.my/39177/ Parameter study of neck force in restrained 3 year old child involved in vehicle side impact Shasthri, Sevaguru Venkatason, Kausalyah Shah, Qasim Hussain Abdullah, Kassim Abdulrahman Idres, Moumen Wong , Sha Voon TL1 Motor vehicles Child casualties and fatalities due to motor vehicle crashes are an increasing concern. In side impact crashes, the investigation of neck forces pertaining to Child Restraint System design, misuse and crash parameters are yet unexplored due to modelling constraints and experimental limitations. In this work, a three year old child seated in a Child Restraint System is subjected to lateral side impact crash. A Prescribed Structural Motion simulation method is used in which the loading pulse is obtained based on experimental data. A hybrid model comprising of multi-body ellipsoids and finite elements is developed and validated for the simulation of the lateral side impact of a HYBRID III three year old child dummy. The model is found to be computationally very economical as well as acceptably accurate. Subsequently, the model is adapted to include intrusion effects at oblique impact angles and the Design of Experiments methodology is used as a tool for this purpose. A Latin Hypercube Sampling design is used to generate the simulation runs for which a total of six parameters are considered. The simulation runs are conducted with two different impact velocities and are grouped separately. The impact velocities used are 15 km/h and 20 km/h in which the former represents the standard test impact speed. The singular and cross interactive effect of each parameter on the Neck Force of the three year old child dummy is studied. This is achieved through regression analysis where the Response Surface Method models are shown to be suitable for the mathematical modelling of the problem. Student’s t test is used to conduct parameter sensitivity studies for the Neck Force response. The impact angle is revealed to be the most sensitive parameter to affect neck forces during side impact, especially for narrow impact angles (ϕ ≤ 60°). A critical range is established in which the Neck Forces are found to be highest primarily between impact angles 50° and 70°. A secondary critical range is also observed for angles below 34°. It is seen that most of the other parameters are generally found to be moderately significant only at low impact speed (15 mph). AENSI Publisher 2014 Article PeerReviewed application/pdf en http://irep.iium.edu.my/39177/1/145-154.pdf Shasthri, Sevaguru and Venkatason, Kausalyah and Shah, Qasim Hussain and Abdullah, Kassim Abdulrahman and Idres, Moumen and Wong , Sha Voon (2014) Parameter study of neck force in restrained 3 year old child involved in vehicle side impact. Australian Journal of Basic and Applied Sciences, 8 (9). pp. 145-154. ISSN 1991-8178 http://www.ajbasweb.com/old/2-ajbas_June_2014.html
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL1 Motor vehicles
spellingShingle	TL1 Motor vehicles Shasthri, Sevaguru Venkatason, Kausalyah Shah, Qasim Hussain Abdullah, Kassim Abdulrahman Idres, Moumen Wong , Sha Voon Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
description	Child casualties and fatalities due to motor vehicle crashes are an increasing concern. In side impact crashes, the investigation of neck forces pertaining to Child Restraint System design, misuse and crash parameters are yet unexplored due to modelling constraints and experimental limitations. In this work, a three year old child seated in a Child Restraint System is subjected to lateral side impact crash. A Prescribed Structural Motion simulation method is used in which the loading pulse is obtained based on experimental data. A hybrid model comprising of multi-body ellipsoids and finite elements is developed and validated for the simulation of the lateral side impact of a HYBRID III three year old child dummy. The model is found to be computationally very economical as well as acceptably accurate. Subsequently, the model is adapted to include intrusion effects at oblique impact angles and the Design of Experiments methodology is used as a tool for this purpose. A Latin Hypercube Sampling design is used to generate the simulation runs for which a total of six parameters are considered. The simulation runs are conducted with two different impact velocities and are grouped separately. The impact velocities used are 15 km/h and 20 km/h in which the former represents the standard test impact speed. The singular and cross interactive effect of each parameter on the Neck Force of the three year old child dummy is studied. This is achieved through regression analysis where the Response Surface Method models are shown to be suitable for the mathematical modelling of the problem. Student’s t test is used to conduct parameter sensitivity studies for the Neck Force response. The impact angle is revealed to be the most sensitive parameter to affect neck forces during side impact, especially for narrow impact angles (ϕ ≤ 60°). A critical range is established in which the Neck Forces are found to be highest primarily between impact angles 50° and 70°. A secondary critical range is also observed for angles below 34°. It is seen that most of the other parameters are generally found to be moderately significant only at low impact speed (15 mph).
format	Article
author	Shasthri, Sevaguru Venkatason, Kausalyah Shah, Qasim Hussain Abdullah, Kassim Abdulrahman Idres, Moumen Wong , Sha Voon
author_facet	Shasthri, Sevaguru Venkatason, Kausalyah Shah, Qasim Hussain Abdullah, Kassim Abdulrahman Idres, Moumen Wong , Sha Voon
author_sort	Shasthri, Sevaguru
title	Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
title_short	Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
title_full	Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
title_fullStr	Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
title_full_unstemmed	Parameter study of neck force in restrained 3 year old child involved in vehicle side impact
title_sort	parameter study of neck force in restrained 3 year old child involved in vehicle side impact
publisher	AENSI Publisher
publishDate	2014
url	http://irep.iium.edu.my/39177/ http://irep.iium.edu.my/39177/ http://irep.iium.edu.my/39177/1/145-154.pdf
first_indexed	2023-09-18T20:56:16Z
last_indexed	2023-09-18T20:56:16Z
_version_	1777410325247688704

Parameter study of neck force in restrained 3 year old child involved in vehicle side impact

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