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ATD Biodynamic Response During Lateral Impact Using the Horizontal Impulse Accelerator

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Technical Report,01 Mar 2014,30 Nov 2014

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Infoscitex Corporation Dayton

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Research was conducted involving a series of impact tests on the HIA in a lateral impact orientation as part of a collaboration between AFIT and the 711th Human Performance Wing under AFRL. The purpose of the tests was to conduct an assessment of the biodynamic response of a ATD for the development of neck injury criteria. Testing was completed using a 50th male Hybrid III aerospace ATD. A specially designed test matrix was developed to assess ATD response as a function of various seat configurations which were an approximation of the seat configurations used by MCW for lateral impact tests of PMHS subjects. The lateral seat configurations were a rigid seat with a 5 pt harness and a padded seat with a 3 pt harness, and the input acceleration pulses were trapezodial in shape and varied in peak magnitude from 8.5 to 17 G. The rigid and padded seat configurations both had the assessed parameters generate fairly linear responses across the input acceleration range. The rigid seat had small standard deviations and the padded seat had larger standard deviations for the assessed parameters. The ATDs response with the padded seat and the 3 pt restraint was greater than the ATDs response with the rigid seat and the 5 pt. restraint by a factor or 2, and the upper neck My torque showing the greatest increase from the rigid seat configuration to the padded seat configuration. This highlights the importance of a proper restraint and the importance of controlling the motion of the torso since it could reduce the loads and torques of the unrestrained head and neck resulting in a lower probability of injury. Injury risk as determined by MANICy exceeded the AFRL limit at input accelerations of 12.5 G and greater.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Human Factors Engineering and Man Machine Systems

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