Method for Calculating Relaxation of Residual Stresses in a Surface-Hardened Rotating Rod Under Creep Conditions With Constraints on Linear and Angular Displacements

Радченко, Владимир Павлович; Tsvetkov, V. V.; Саушкин, Михаил Николаевич

doi:10.3103/s0025654422020200

Cited by 2 publications

(5 citation statements)

References 11 publications

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“…Феноменологический метод реконструкции остаточных напряжений (первый этап рассматриваемой задачи) в тонкостенных трубках для случая двухстороннего упрочнения подробно изложен в работе [29] и апробирован на экспериментальных данных для трубок 12 (…”

Section: математическая модель реконструкции остаточного напряженно-д...unclassified

“…После построения реологической модели выполнены модельные расчеты для оценки релаксации остаточных напряжений для трубок 12…”

Section: результаты расчетов релаксации остаточных напряжений в тонко...unclassified

“…Этот факт служит обоснованием применения методов ППД к таким деталям, поскольку приповерхностные области со сжимающими остаточными напряжениями препятствуют возникновению и развитию микротрещин. Для тонкостенных полых и сплошных цилиндров разработаны методики реконструкции остаточных напряжений после упрочнения и расчета их релаксации в процессе высокотемпературной ползучести, но лишь при одностороннем упрочнении поверхности цилиндров [12][13][14][15][16][17] ,, i r z . Недиагональные компоненты тензоров не учитываются, поскольку в [15] экспериментально и теоретически показано, что их значения (по модулю) в 6 и более раз меньше значений для нормальных компонент.…”

Section: Introductionunclassified

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Mathematical modeling of relaxation of residual stresses in thin-walled pipelines in the delivery state and after bilateral surface hardening at creep

Радченко

Berbasova

Tsvetkov

et al. 2021

PNRPU Mechanics Bulletin

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A mathematical model of reconstruction of the fields of residual stresses and plastic deformations in thin-walled cylindrical tubes in the delivery state and after bilateral surface plastic hardening was developed. It included a method for identification of the model parameters using the example of thin-walled mm tubes made of X18N10T steel based on experimental data for the axial and circumferential components of the residual stress tensor for samples in the delivery state and after bilateral mechanical ultrasonic hardening. The adequacy of the mathematical model for the reconstruction of residual stresses in the thin-walled tubes made of X18N10T steel was verified by the experimental data in the state of delivery and after bilateral surface plastic hardening, taking into account the anisotropy of the distribution of plastic deformation after hardening in the axial and circumferential directions. A method for calculating the two-way relaxation of residual stresses on the outer and inner surfaces of thin-walled tubes under creep conditions was developed based on the generalization of the corresponding method for unilateral hardening. The relaxation process in the thin-walled tubes made of 08X18N9 steel (an early analogue of X18N10T steel) under conditions of thermal exposure, axial tension, internal pressure and the combined action of axial tension and internal pressure was investigated on the basis of the constructed phenomenological creep theory for this steel. A detailed analysis of the kinetics of the fields of residual stresses during creep in the thin-walled samples in the delivery state and after bilateral hardening at different times was performed. It is shown that under these conditions, almost a complete relaxation of residual technological stresses occurs both in the samples in the delivery state and after bilateral surface plastic deformation within 50 hours.

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Section: математическая модель реконструкции остаточного напряженно-д...unclassified

Section: результаты расчетов релаксации остаточных напряжений в тонко...unclassified

Section: Introductionunclassified

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Mathematical modeling of relaxation of residual stresses in thin-walled pipelines in the delivery state and after bilateral surface hardening at creep

Радченко

Berbasova

Tsvetkov

et al. 2021

PNRPU Mechanics Bulletin

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“…An impact at a right angle causes less deformation due to less crumpling of the adjacent layers of material. The smaller the fraction of the shot, the better the coating level of the treated surface, because a smaller ball diameter leads to a doubling of the number of pellets per 1 kg for shot blasting [1].…”

Section: Fig 2 Automatic Shot Peening Machine (Shot Peening Robot)mentioning

confidence: 99%

“…Analysis of the operating conditions of the blades shows that when compressive residual stresses are formed in the surface layer, the fatigue strength of the parts increases. The physical model of the mechanism of formation of technological residual stresses in relation to the processed parts, the surface layer of which is subjected to deformation during machining, is the atomic or dislocation model [1].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Residual Stresses during Processing of GTE Blades with Microbeads

Nosov

Kurguzov

Lyushnya

2021

MSF

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A method for determining the residual stress through the deformation of a witness sample during pneumatic blasting of gas turbine engine parts with microbeads is proposed. During the study, the processing modes and the diameter of the microbeads were changed. It is shown that with an increase in the diameter of the micro-ball from 0.3 mm to 0.7 mm, the deformation of the samples increased by 2 times, and with an increase in the speed of their movement from 70 m/s to 90 m/s by 50 %. The mechanism of formation of residual stresses and deformations of the treated surface of the witness sample is proposed.

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Method for Calculating Relaxation of Residual Stresses in a Surface-Hardened Rotating Rod Under Creep Conditions With Constraints on Linear and Angular Displacements

Cited by 2 publications

References 11 publications

Mathematical modeling of relaxation of residual stresses in thin-walled pipelines in the delivery state and after bilateral surface hardening at creep

Mathematical modeling of relaxation of residual stresses in thin-walled pipelines in the delivery state and after bilateral surface hardening at creep

Investigation of Residual Stresses during Processing of GTE Blades with Microbeads

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