Residual life estimation of damaged structures exposed to high pressures and temperatures
2023
Autori
Raičević, NikolaGrbović, Aleksandar
Kastratović, Gordana
Vidanović, Nenad
Sedmak, Aleksandar
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 – The standard response ...surface type - full second order polynomials – 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.
Ključne reči:
high-pressure turbine / Inconel 718 / Electrical Discharge Machining / Paris coefficientsIzvor:
Procedia Structural Integrity, 2023, 48, 342-347Izdavač:
- ELSEVIER
Kolekcije
Institucija/grupa
Mašinski fakultetTY - JOUR 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/123456789/7006 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 – The standard response surface type - full second order polynomials – 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 - ELSEVIER T2 - Procedia Structural Integrity T1 - Residual life estimation of damaged structures exposed to high pressures and temperatures EP - 347 SP - 342 VL - 48 DO - 10.1016/j.prostr.2023.07.123 ER -
@article{ 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 – The standard response surface type - full second order polynomials – 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 = "ELSEVIER", journal = "Procedia Structural Integrity", title = "Residual life estimation of damaged structures exposed to high pressures and temperatures", pages = "347-342", volume = "48", doi = "10.1016/j.prostr.2023.07.123" }
Raičević, N., Grbović, A., Kastratović, G., Vidanović, N.,& Sedmak, A.. (2023). Residual life estimation of damaged structures exposed to high pressures and temperatures. in Procedia Structural Integrity ELSEVIER., 48, 342-347. https://doi.org/10.1016/j.prostr.2023.07.123
Raičević N, Grbović A, Kastratović G, Vidanović N, Sedmak A. Residual life estimation of damaged structures exposed to high pressures and temperatures. in Procedia Structural Integrity. 2023;48:342-347. doi:10.1016/j.prostr.2023.07.123 .
Raičević, Nikola, Grbović, Aleksandar, Kastratović, Gordana, Vidanović, Nenad, Sedmak, Aleksandar, "Residual life estimation of damaged structures exposed to high pressures and temperatures" in Procedia Structural Integrity, 48 (2023):342-347, https://doi.org/10.1016/j.prostr.2023.07.123 . .