Lateral Side Impact Crash Simulation of Restrained 3 Year Old Child

Abstract:

Motor vehicle crashes have become the leading cause of death for children in many developed countries and the trend is on the rise in Malaysia. Child anatomy and physiology necessitates a separate restraints system to be implemented during vehicle travel. Although approximately twice as many crashes with a child fatality are frontal compared to lateral, it is shown that side impacts are nearly twice as likely to result in a child fatality as frontal impacts. Due to the complexity and the highly non-linear nature of vehicle crash affecting occupants, much work still remains to be looked into. This is especially so in the study of injury mechanisms towards efforts of improving CRS design as well as vehicle parameters that may offer more effective and robust injury mitigation. The study here presents a methodology which outlines the development and testing of a simulation model where a 3 year old child, restrained in a CRS within a vehicle, is subjected to lateral side impact by a bullet vehicle. A combined environment of both Finite Element as well as Multi-body is used for the model development. A HYBRID III dummy model is used to represent the child while an FE model is used for the CRS model. A hybrid modelling method is utilized for the belt harness system. The model and simulation conditions are set based on the global FMVSS standard. Head injury criterion and Neck injury criterion are primarily considered in the model assessment. Model development as well as validation steps are presented with discussion of the model’s salient features for greater insights in the study of injury mechanisms.

References

[1] National Highway Traffic Safety Administration, Traffic Safety Facts 2005 (DOT HS 810 618, pp.1-6). U.S. Department of Transportation, (2005).

[2] National S.A.F.E., Campaign, K.I.D. S,. Motor Vehicle Occupant Injury Fact Sheet. NSKC, Washington, D.C., (2004).

[3] Partners for Child Passenger Safety, Fact and Trend Report 2008, Children's Hospital of Philadelphia, Philadelphia, PA, (2008).

[4] http: /www. research. chop. edu/programs/injury/files/PCPS_Reports/2008_FT. pdf.

[5] C.P. Sherwood, S.A. Fergusan, J.R. Crandall, Factors leading to crash fatalities to children in child restraints, In: Annual proceedings/Association for the Advancement of Automotive Medicine, vol 47, 2003, pp.343-359.

[6] K.B. Arbogast, R.A. Cornejo, M.J. Kallan, F.K. Winston, D.R. Durbin, Injuries to children in forward facing child restraints. In: Annual Proceedings/ Association of Advancement of Automotive Medicine, vol. 46, 2002, pp.212-230.

[7] K. Weber, Crash Protection for Child Passengers: A Review of Best Practice, UMTRI Research Review, University of Michigan Transportation Research Institute, vol. 31, 2000, pp.1-28.

[8] Yingai Cui, Masatomo Yamaguchi, Koji Mizuno, Yoshinori Tanaka, Ryoichi Yoshida, FE analysis of child occupant kinematics in cars in side oblique impact, International Journal of Crashworthiness. 173 (2012) 233-242.

DOI: 10.1080/13588265.2011.648515

[9] Vehicle Crash Test Database, Test no 4585, National Highway Traffic Safety Administration (NHTSA). (2006).

[10] TNO Automotive, MADYMO Model Manual Version 7. 4. 1, Delft, Netherlands. (2013).

[11] T. Kapoor, W. Altenhof, A. Howard, J. Rasico, F. Zhu, Methods to mitigate injury to toddlers in near-side impact crashes, Accident Analysis and Prevention. 40 (2008) 1880-1892.

DOI: 10.1016/j.aap.2008.07.008

[12] TNO Automotive, MADYMO Applications Manual Version 7. 4. 1, Delft, Netherlands, (2013).