Evolution of Theoretical Concepts of Thermal Stress Resistance

Winkelman and Shott, who published on thermal stress resistance in 1894, brought the characteristics of thermal stress resistance into criterial form, as the ratio of a material's strength to the value of the thermal stress. This ratio was marked by the first character, R, of the English word ‘Resistance’. In the first half of the twentieth century, J.N. Goodier, B.A. Boley, V.D. Kindjery and A.V. Lykov established the basic relations of temperature origin of patterns and thermal stresses, in different bodies on coordinate, time and other parameters. It has been demonstrated in early experimental works [25, 26, 32, 33], that fracture of brittle materials at thermal loading depends on a tension defined by conditions of external thermal effect, size and shape of the body.

Scientists of the Institute of Physical-Technical problems in Lithuania in the 1970s [16] performed calculations of regime factors of prismatic bodies at various thermal loading modes on the basis of which, for the first time anywhere in the world, a practical method for quantitative assessment of thermal stress resistance of bricks was devised.