This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Methodology for Measurement and Analysis of Head-To- B-Pillar Contact Pressure and Area Response
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 05, 2001 by SAE International in United States
Annotation ability available
Event: SAE 2001 World Congress
Government accident statistics show that approximately 35% of all car accident victims suffer an injury to the head and face. Such injuries are common during frontal, side, and rollover accidents as the head may impact the steering wheel, side pillars, windshield, or roof. Further, non-threatening injuries (i.e abrasions) may be suffered due to contact with the deployed airbag, or, in the case of an out-of-position occupant, a deploying airbag. While the forces and accelerations measured internal to the head are known to correlate with serious head injury (i.e. concussion, skull fracture, diffuse axonal injury), it is currently not possible to record how the loads are distributed over the head and face with the current ATD. Ultimately, such data could eventually be used to provide improved resolution as to the probability of superficial, soft tissue damage since past cadaver studies show that the distribution of contact pressures are related to such injuries. In the current study, we present a methodology to record the contact pressures and area between a Hybrid III, ATD head-neck complex and the B-pillar. This contact event represented one exemplar impact event, which typically results in soft tissue damage in the field. The ATD head /neck subassembly was mounted transversely on a carriage and propelled along a track to a given pre-impact velocity and was stopped by a rigid mounted B-pillar structure. The head/neck was propelled to three different velocities prior to impact: 7.9, 12.1 and 14.3 kph. The contact pressure and area at the interface of the head were recorded digitally using an electronic pressure transducer both with and without a side air curtain. At each impact velocity, the air curtain was statically inflated to pressures of 13.8, 20.7, 27.6, 41.4 & 55.1 kPa to determine the effect of bag pressure on head-pillar contact mechanics. The pressure mat transducer recorded the contact pressure and area at 1,340 Hz. It was found that direct contact of the head against the B-pillar produced large contact pressures centered at the point of contact which migrated as the head rotated laterally during the contact event. The introduction of the side air curtain produced a significant reduction in contact pressures and head g forces. These data show one method of determining how the head surface is loaded over time, and how that load is distributed over the head.
CitationMarigowda, H., Benny, J., Atkinson, P., Schulz, K. et al., "A Methodology for Measurement and Analysis of Head-To- B-Pillar Contact Pressure and Area Response," SAE Technical Paper 2001-01-0718, 2001, https://doi.org/10.4271/2001-01-0718.
- Atkinson P Atkinson T Haut R Eusebi C Maripudi V Sambatur K 1998 Development of Injury Criteria for Human Surrogates to Address Current Injury Trends in Knee-to-Instrument Panel Injuries 42nd Stapp Car Crash Conference 13 31
- Chou C Nyquist G 1974 Analytical Studies of the Head Injury Criterion (HIC) 740082
- Allsop D Warner C Wille M Schneider D Nahum A 1988 Facial Impact Response – A Comparison of the Hybrid III Dummy and Human Cadaver Stapp Car Crash Conference 32: 881719
- Benson B Perl T Smith G 1991 Lateral Load Sensing Hybrid III Head Stapp Car Crash Conference 35: 912908
- Welbourne E Ramet M Zarebski M 1989 A Comparison of Human Facial Fracture Tolerance with the Performance of a Surrogate Test Device National Highway Traffic Safety Administration Washington, D.C.,USA
- Atkinson P Haut R Eusebi C Hill T 1999 Application of a Knee Injury Criteria for the Hybrid III Dummy to Address a Variety of Car Crash and restraint Scenarios International Congress and Exposition: paper 1999-01-0710
- Cook LM Rieser RG Siegal AW Nahum AM Correlation between windshield head injuries and laboratory tests. Part I: Feasibility of relatin headform impacts to clinical head injuries 690803
- Browne AL Wood TL Reducing facial lacerations in head-windshield impacts with windshield lubricants 851735