DETECTION OF HAZARDOUS STATES AND FAULT CONTROL
 IN STRETCHED STEEL ELEMENTS BY THERMAL METHOD

Abstract

The article discusses the areas of effective application, the features of heat generation and the main possibilities
 of the passive method of thermal non-destructive testing of steel elements and products. The basic requirements
 for passive thermal control equipment are formulated. The mechanism of heat generation in steel is described and
 the structure of the formula for changing its temperature during deformation is substantiated. It is shown that
 the diagnostics of steel elements in the passive mode should be carried out with the functioning of heat sources in them,
 arising as a result of force effects on structures. The features of determining the stress state in steel elements by
 the passive thermal method are considered.
 
 It is shown that the passive method of thermal non-destructive testing of steel structures, loaded with
 continuously increasing or decreasing forces in time, under the influence of which internal deformation heat sources
 and surface temperature fields function in potentially dangerous zones of elements, makes it possible to control the
 operability in elastic, elastic-plastic stages of steel operation, the origin and development of destruction. The power
 of thermal deformation sources, the places of their occurrence and the kinetics of development depend on the conditions
 of force loading, external temperature influences, material and structural shape of the elements.