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Worldsid assessment of far side impact countermeasures
Frank A Pintar1, Narayan Yoganandan, Brian D Stemper
1Medical College of Wisconsin, Milwaukee Wisconsin, USA.
Annual Proceedings. Association for the Advancement of Automotive Medicine
|September 14, 2006
Summary
Far side impact research shows inboard shoulder belts can reduce head movement but may increase neck injury risk. Restraints like shoulder or thorax plates limit head excursion but cause significant dummy displacement.
Area of Science:
- Automotive Safety Engineering
- Biomechanics
- Injury Prevention
Background:
- Far side impact trauma constitutes a significant portion of overall side-impact injuries.
- The WorldSID dummy shows promise for evaluating far side impact protection.
Purpose of the Study:
- To evaluate the effectiveness of potential countermeasures for far side impacts.
- To analyze trade-offs in generic countermeasure design using the WorldSID dummy.
Main Methods:
- A specialized far side impact test buck was designed for a sled test system.
- The test setup included a center console and outboard three-point belt, with options for inboard shoulder belts or shoulder/thorax restraints.
- Tests were conducted with the WorldSID dummy in 90-degree and 60-degree impact orientations.
Main Results:
- Inboard shoulder belts, when positioned over the mid-neck, generated high neck shear forces (2430 N).
- Horizontal inboard shoulder belt placement reduced shear forces to levels comparable to outboard belts (830–1100 N).
- Shoulder or thorax restraints effectively limited head excursion but resulted in significant dummy displacements (shoulder: 30–43 mm; thorax: 39–64 mm).
Conclusions:
- Inboard restraints can reduce head excursion in far side impacts.
- The design and placement of these restraints are critical for optimizing injury mitigation.
- Further research is needed to balance head excursion reduction with other injury risks.
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