МЕТОД ЭКВИВАЛЕНТНЫХ ИСПЫТАНИЙ ДЛЯ ПРОГНОЗИРОВАНИЯ МАЛОЦИКЛОВОЙ ДОЛГОВЕЧНОСТИ КРУПНОГАБАРИТНЫХ ДЕТАЛЕЙ ГТД НА ОСНОВЕ ИСПЫТАНИЙ ОБРАЗЦОВ С КОНЦЕНТРАТОРОМ НАПРЯЖЕНИЙ

Abstract

The low cycle fatigue equivalent test method based on the application of development specimens whose stress and strain state shall be similar to stress and strain state of the part to be investigated is given in this examination. Stiffness ratio of the stressed state is used as the similarity criterion of stress and strain state of specimens and part The method was successfully applied on gas turbine engine low pressure compressor disk. Round specimens with V-concentrator were used as equivalent specimens.