The Reflectance and Thermal Response of Graphite Fibre Reinforced Epoxy During Irradiation by a High-Power CO sub 2 Laser,
Abstract
Graphite fibre reinforced epoxy (GFRP) samples were irradiated by a high-power CO2 laser while the samples were exposed to high-speed flows of argon and air. Part of the angular distribution of the reflected CO2 radiation was measured as a function of time and the total reflectance/absorptance estimated. The thermal response of the samples was measured using thermocouples embedded in the samples. A one-dimensional model was used to show that one set of parameters could predict both the observed thermal response and the mass-loss rate that had been observed by other experimenters. The values of ablation enthalpy and absorptance derived from the model appear to be effective values that compensate for effects that are not included in the model, such as the mechanical removal of material and the combustion of decomposition products in air near the surface of the samples.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1986
- Accession Number
- ADA174769
Entities
People
- David R. Brighton
Organizations
- Defence Science and Technology Group