METHOD OF INVESTIGATING THERMAL STRESSES ARISING IN SOLID MATERIAL BODY WITH POLARIZATION-OPTICAL METHOD ON MODEL FROM PIEZO-OPTICAL MATERIAL UNDER LOCAL HEAT FLOW IMPACT ON THEM WITH THEORETICAL COEFFICIENT DETERMINATION OF THERMAL STRESS CONCENTRATION

摘要

FIELD: physics.;SUBSTANCE: model of a piezo-optical material is heated by a local heat flow. The resulting interference pattern is registered. The model is cooled and the distribution of isoclines and isochrome-strips is examined, the number and order of bands-isochrome is examined by using a polarizing microscope. The theoretical coefficient of the thermal stress concentration is determined as a ratio between the arising maximum and nominal stresses or as the ratio of the maximum order of the isochrome-band to the nominal order of the isochrome-band.;EFFECT: providing the possibility of determining the concentration of thermal stresses, when the material body is exposed to a local heat flow.;35 cl, 8 dwg