Helmet Impact Tests with a Modified ACES II Headrest

Abstract

To counteract the effects of brain injury, head protection has been designed into environments where severe head impact is probable. An experimental effort was conducted to evaluate the effectiveness of various foam pads in reducing trauma to the head resulting from impact with the ACES II headrest. A series of vertical drops with a Helmet Drop Tower (HDT) facility and an instrumented head form were conducted using the HGU-55/P flight helmet, a current ACES II headrest, and samples of two types of foam (Confor and F-Cell foam). The probability of head injury, as determined by the Head Injury Criteria (HIC), was calculated using measured impact acceleration of the head from for each impact surface. The head form acceleration, resulting HIC values, and probability of severe brain injury values for the Confor foam tests were all less than the comparative values for either the standard ACES II headrest or the headrest with the F-Cell foam.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1999
Accession Number
ADA377142

Entities

People

  • Chris E. Perry

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Human Systems
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Brain Injuries
  • Data Acquisition
  • Ejection Seats
  • Energy Levels
  • Flight Helmets
  • Head Injuries
  • Headrests
  • Impact Acceleration
  • Impact Tests
  • Load Cells
  • Recording Systems
  • Standards
  • Test Facilities

Readers

  • Human-Computer Interaction (HCI).
  • Polymer Science and Engineering.
  • Trauma or Military Medicine