Residual life estimation of damaged structures exposed to high pressures and temperatures
2023
Аутори
Raičević, NikolaGrbović, Aleksandar
Kastratović, Gordana
Vidanović, Nenad
Sedmak, Aleksandar
Конференцијски прилог (Објављена верзија)
,
Društvo za Integritet i Vek Konstrukcija “Prof dr Stojan Sedmak”, Belgrade, Serbia
Метаподаци
Приказ свих података о документуАпстракт
This paper deals with the damage growth in High-Pressure Turbine (HPT) cooling holes of the case assembly made of Inconel 718. Several marks (cuts) were made on cooling holes into parent material during the service due to the non-skilled use of Electrical Discharge Machining (EDM) in the workshop. After a certain time, the case assembly returned to the workshop with all EDM marks cracked. Since HPT case assembly is not repairable and the only method for fixing this issue is its replacement with the new or used one (which might be pretty expensive), it was decided to use numerical analysis to estimate Paris coefficients for used Inconel 718, since the number of cycles and crack growth from the initial position were known, based on data obtained from the workshop. Firstly, finite element method (FEM) based numerical analysis was conducted in order to simulate crack propagation to match the one observed in the workshop, and then a multi-objective genetic algorithm – implemented thru respo...nse surface optimization – was used to obtain required Paris coefficients. The objectives of this optimization were the crack length and the corresponding number of cycles of crack growth. Obtained Paris coefficients were then used to estimate the residual life of HPT case assembly.
Кључне речи:
High-pressure turbine / Inconel 718 / Electrical Discharge Machining / Paris coefficientsИзвор:
2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), 2023, 96-Издавач:
- Belgrade : Društvo za Integritet i Vek Konstrukcija “Prof dr Stojan Sedmak”
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Raičević, Nikola AU - Grbović, Aleksandar AU - Kastratović, Gordana AU - Vidanović, Nenad AU - Sedmak, Aleksandar PY - 2023 UR - https://machinery.mas.bg.ac.rs/handle/123456789/6804 AB - This paper deals with the damage growth in High-Pressure Turbine (HPT) cooling holes of the case assembly made of Inconel 718. Several marks (cuts) were made on cooling holes into parent material during the service due to the non-skilled use of Electrical Discharge Machining (EDM) in the workshop. After a certain time, the case assembly returned to the workshop with all EDM marks cracked. Since HPT case assembly is not repairable and the only method for fixing this issue is its replacement with the new or used one (which might be pretty expensive), it was decided to use numerical analysis to estimate Paris coefficients for used Inconel 718, since the number of cycles and crack growth from the initial position were known, based on data obtained from the workshop. Firstly, finite element method (FEM) based numerical analysis was conducted in order to simulate crack propagation to match the one observed in the workshop, and then a multi-objective genetic algorithm – implemented thru response surface optimization – was used to obtain required Paris coefficients. The objectives of this optimization were the crack length and the corresponding number of cycles of crack growth. Obtained Paris coefficients were then used to estimate the residual life of HPT case assembly. PB - Belgrade : Društvo za Integritet i Vek Konstrukcija “Prof dr Stojan Sedmak” C3 - 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) T1 - Residual life estimation of damaged structures exposed to high pressures and temperatures SP - 96 UR - https://hdl.handle.net/21.15107/rcub_machinery_6804 ER -
@conference{ author = "Raičević, Nikola and Grbović, Aleksandar and Kastratović, Gordana and Vidanović, Nenad and Sedmak, Aleksandar", year = "2023", abstract = "This paper deals with the damage growth in High-Pressure Turbine (HPT) cooling holes of the case assembly made of Inconel 718. Several marks (cuts) were made on cooling holes into parent material during the service due to the non-skilled use of Electrical Discharge Machining (EDM) in the workshop. After a certain time, the case assembly returned to the workshop with all EDM marks cracked. Since HPT case assembly is not repairable and the only method for fixing this issue is its replacement with the new or used one (which might be pretty expensive), it was decided to use numerical analysis to estimate Paris coefficients for used Inconel 718, since the number of cycles and crack growth from the initial position were known, based on data obtained from the workshop. Firstly, finite element method (FEM) based numerical analysis was conducted in order to simulate crack propagation to match the one observed in the workshop, and then a multi-objective genetic algorithm – implemented thru response surface optimization – was used to obtain required Paris coefficients. The objectives of this optimization were the crack length and the corresponding number of cycles of crack growth. Obtained Paris coefficients were then used to estimate the residual life of HPT case assembly.", publisher = "Belgrade : Društvo za Integritet i Vek Konstrukcija “Prof dr Stojan Sedmak”", journal = "2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023)", title = "Residual life estimation of damaged structures exposed to high pressures and temperatures", pages = "96", url = "https://hdl.handle.net/21.15107/rcub_machinery_6804" }
Raičević, N., Grbović, A., Kastratović, G., Vidanović, N.,& Sedmak, A.. (2023). Residual life estimation of damaged structures exposed to high pressures and temperatures. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) Belgrade : Društvo za Integritet i Vek Konstrukcija “Prof dr Stojan Sedmak”., 96. https://hdl.handle.net/21.15107/rcub_machinery_6804
Raičević N, Grbović A, Kastratović G, Vidanović N, Sedmak A. Residual life estimation of damaged structures exposed to high pressures and temperatures. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023). 2023;:96. https://hdl.handle.net/21.15107/rcub_machinery_6804 .
Raičević, Nikola, Grbović, Aleksandar, Kastratović, Gordana, Vidanović, Nenad, Sedmak, Aleksandar, "Residual life estimation of damaged structures exposed to high pressures and temperatures" in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) (2023):96, https://hdl.handle.net/21.15107/rcub_machinery_6804 .