SURFACE FAILURE OF CO2 LASER IRRADIATED GLASS

Authors
  1. MacPherson, R.W.
  2. Anctil, J-C.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The possibility of failure of laser heated glass has important implications in experiments on the thermal shock resistance of materials and in the potential applications of lasers to the machining and heat treating of glass. We describe a method of measuring the damage probability distribution function for laser irradiated glass and develop a model to predict the temperature and stress distributions as a function of time. The experiments and model show that for CO2 laser pulse lengths inferior to 1 ms, the mode of failure is by fracture under tensile stress induced during cooling after heating a thin layer near the surface beyond the annealing point.
Report Number
DREV-4202/81 —
Date of publication
15 Apr 1981
Number of Pages
20
DSTKIM No
81-02956
CANDIS No
33832
Format(s):
Originator's fiche received by DSIS;Hardcopy

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