Stressed State of Nozzles with Local Extractions of Defects
We study the complex stress-strain state of nozzles with extractions of defects on the inner surface under the operating conditions. On this basis, we construct functional dependences between the depth, length, and width of extraction made for the evaluation of its geometric parameters for which the operating stresses in the nozzle do not exceed permissible stresses. The obtained dependences have been used at the Burshtyn Thermal Power Plant to develop a technology of repair works on the power-generating equipment by extracting samples of the material near defective areas.
Keywordsstrength fracture of materials service life power-generating equipment
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