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Journal of Applied Mechanics and Technical Physics

2002 year, number 2

Stress state in glass bodies degassed under heating by infrared radiation

A. R. Gachkevich, T. L. Kurnitskii, and R. F. Terletskii
Podstrigach Institute of the Applied Problems of Mechanics and Mathematics, National Academy of Sciences of Ukraine, L'vov 79053
Pages: 302-310

Abstract

A model is proposed to calculate
stresses in a glass layer with gas
impurities heated by thermal infrared
radiation. Calculations were performed
for a layer with a diatomic impurity of
nitric oxide and a triatomic impurity of
water. It is shown that for the
radiation parameters and impurity
concentrations considered, the presence
of nitric oxide in the layer does not
influence its stress state, whereas the
presence of water leads to a certain
increase of stress. The stress state of
the layer is determined by the level of
thermal stresses, and the concentration
stresses and the stresses due to the
mass forces of radiation are negligible.
An increase in the rate of diffusion of
the diatomic impurity due to a change of
the radiation spectrum is accompanied by
an increase of thermal stresses.