Helmet Cold Conditioning: Correlation of Structural Temperatures in Actual and Simulated Cold Environments,
Abstract
An experiment was conducted at the US Army Aeromedical Research Laboratory, USAARL, to correlate the helmet thermal characteristics found in cold temperature conditioning as required by current impact test methodologies (American National Standards Institute (ANSI) Standard Z90.1 and the Department of Transportation (DOT) Motor Vehicle Safety Standard (MVS) No. 218, Motorcycle Helmet 49CSR571.218) and the thermal characteristics which occur during actual use by the wearer in a cold environment. Four types of helmets were used in this evaluation: sling suspension, form-fit, standard motorcycle, and short motorcycle helmets. Temperatures were taken within the helmet structure using thermocouples at the following locations: on top of the exterior surface of the shell, at the interface between the shell and the crushable liner, at the center of the crushable and at the center of the comfort liner. Standard helmet impact test methodologies do not simulate potential, real world, cold climate conditions. The standard impact test methodologies are inappropriate for the determination of cold temperature dynamic response of a helmet system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA050033
Entities
People
- John C. Johnson
- Stanley C. Knapp
Organizations
- United States Army Aeromedical Research Lab