THERMAL RADIATION DAMAGE TO CLOTHS AS A FUNCTION OF TIME OF EXPOSURE, RECTANGULAR PULSES

Abstract

The total e ergy (radiant exposure) required to produce a given level of damage in a material is dependent on the time during which the material is irradiated and the rate at which the energy is applied (irradiance). The purpose of this study was to determine the nature of this relationship for cloths. Several cotton and wool cloths ere exposed to the 3 carbonarc sources. Results indicate that reciprocity holds for rectangular pulses of intense thermal radiation applied to the cloths, for char-through and for complete destruction, only for exposure times equal to or less than 1 second. For threshold damage for these times and for all 3 levels of damage for exposure times greater than 1 sec, the critical radiant exposure is not constant but is proportional to approximately the one-fourth power of the exposure time. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 16, 1955
Accession Number
AD0266953

Entities

People

  • John J. Bates
  • T.i. Monahan

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Advanced Materials
  • Electromagnetic Radiation
  • Engineered Materials
  • Materials
  • Radiation
  • Thermal Radiation

Fields of Study

  • Physics

Readers

  • Nuclear and Radiation Engineering.
  • Thermal Physics or Thermal Science.