Research Article | OPEN ACCESS
Neck Moment Response Characterization of Restrained Child Occupant at Standard Test Impact Speed 24.4 km/h
1, 2S. Shasthri, 3V. Kausalyah, 1Q.H. Shah, 1K.A. Abdullah, 1M. M. Idres and 4S.V. Wong
1Faculty of Engineering, International Islamic University Malaysia, 50728 Kuala Lumpur, Malaysia
2Faculty of Engineering, Universiti Selangor, 40000 Shah Alam, Selangor, Malaysia
3Faculty of Mechanical Engineering, Universiti Teknologi MARA, 40000, Selangor, Malaysia
4Malaysian Institute of Road Safety Research (MIROS), Kajang 43000, Selangor, Malaysia
Research Journal of Applied Sciences, Engineering and Technology 2014 1:113-119
Received: March ‎19, ‎2014 | Accepted: April ‎15, ‎2014 | Published: July 05, 2014
Abstract
The effects of bullet vehicle crash impact angle, child restraint system design and restraint harness slack at standard test side impact speed of 24.4 km/h (15 mph) on moments sustained at the neck by a three year old child is investigated. A statistical methodology employing the Design of Experiments is adopted in this study whereby a Latin Hypercube Sampling is chosen as the experiment design. Mathematical models are built using the Response Surface Method based on simulation results whereby, good fitness is achieved. The singular and cross interactive effect of each predictor on the neck moment is analyzed. The number of significant parameters affecting the Neck Moment is shown to be largest for wide impact angles (ϕ≥60°). The vehicle impact angle parameter is revealed to be the largely the most sensitive parameter and on which all the other remaining parameters are highly dependent on. An ideal safe range for low neck moments has been established to be within φ angles 42° and 60°. The vehicle impact angle parameter is shown to be proportional to neck moments for wide impact angles, while it behaves inversely proportional to neck moments for narrow impact angles. The other parameters are generally found to be moderately significant only for wide impact angles. The harness friction coefficient is shown to hold relatively very little influence on neck moments.
Keywords:
Child neck moment, child restraint system, lateral impact, principle degree of force, response surface method , vehicle crash,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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