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Response of PMHS to High- and Low-Speed Oblique and Lateral Pneumatic Ram Impacts
Published November 07, 2011 by The Stapp Association in United States
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In ISO Technical Report 9790 (1999) normalized lateral and oblique thoracic force-time responses of PMHS subjected to blunt pendulum impacts at 4.3 m/s were deemed sufficiently similar to be grouped together in a single biomechanical response corridor. Shaw et al., (2006) presented results of paired oblique and lateral thoracic pneumatic ram impact tests to opposite sides of seven PMHS at sub-injurious speed (2.5 m/s). Normalized responses showed that oblique impacts resulted in more deflection and less force, whereas lateral impacts resulted in less deflection and more force. This study presents results of oblique and lateral thoracic impacts to PMHS at higher speeds (4.5 and 5.5 m/s) to assess whether lateral relative to oblique responses are different as observed by Shaw et al., or similar as observed by ISO. Twelve PMHS were impacted by a 23 kg pneumatic ram with a 152.4 mm x 304.8 mm rectangular face plate at the level of the xyphoid process in either the pure lateral or 30° anterior-to-lateral oblique direction. Because these tests were potentially injurious, only one test per subject was conducted. Normalized responses demonstrate similar characteristics for both lateral and oblique impacts, indicating that it may be reasonable to combine lateral and oblique responses together at these higher speeds to define characteristic PMHS response as was done by ISO. The small number of tests conducted indicates that less chest compression may be required to obtain serious thoracic injury in oblique impacts as compared to lateral impacts at speeds of 4.5 or 5.5 m/s.
- Heather Rhule - National Highway Traffic Safety Administration
- Brian Suntay - Transportation Research Center Inc.
- Rodney Herriott - Transportation Research Center Inc.
- Tara Amenson - Transportation Research Center Inc.
- Jim Stricklin - Transportation Research Center Inc.
- John H. Bolte - The Ohio State Univ.
CitationRhule, H., Suntay, B., Herriott, R., Amenson, T. et al., "Response of PMHS to High- and Low-Speed Oblique and Lateral Pneumatic Ram Impacts," SAE Technical Paper 2011-22-0011, 2011, https://doi.org/10.4271/2011-22-0011.
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