Fatigue life assessment of the structure with widespread damage exposed to high temperature
2020
Authors
Grbović, AleksandarBozić, Z.
Kirin, Snežana
Kastratović, Gordana
Sedmak, Aleksandar
Vidanović, Nenad
Conference object (Published version)
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The exhaust nozzle represents a part of a jet engine which is crucial to its overall performance, since it accelerates the flow of hot gases out of the engine and creates a thrust. During its long service, it is exposed to elevated temperatures and high compressive and hoop stresses, which makes the cracks' occurrence in the exhaust nozzle's inner sleeve almost unavoidable. The aim of this paper is to analyze and numerically estimate the fatigue life of inner sleeve in the presence of widespread damage. When damage is detected, two repair methods are employed: welding of single cracks (manual TIG welding) and the use of welded patches. Using numerical simulations based on extended finite element method (XFEM) and finite element method (FEM), fatigue life of repaired inner sleeves were estimated. Based on the comparison of the results obtained in simulations, it was shown that the repair method with welded patches provides longer fatigue life of widespread damaged nozzle than the other ...with welding of cracks.
Keywords:
XFEM / Thermal loading / FEM / Crack propagationSource:
Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1), 2020, 26, 402-408Publisher:
- Elsevier Science Bv, Amsterdam
DOI: 10.1016/j.prostr.2020.06.051
ISSN: 2452-3216
WoS: 000591520100050
Scopus: 2-s2.0-85090563445
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Institution/Community
Inovacioni centarTY - CONF AU - Grbović, Aleksandar AU - Bozić, Z. AU - Kirin, Snežana AU - Kastratović, Gordana AU - Sedmak, Aleksandar AU - Vidanović, Nenad PY - 2020 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3427 AB - The exhaust nozzle represents a part of a jet engine which is crucial to its overall performance, since it accelerates the flow of hot gases out of the engine and creates a thrust. During its long service, it is exposed to elevated temperatures and high compressive and hoop stresses, which makes the cracks' occurrence in the exhaust nozzle's inner sleeve almost unavoidable. The aim of this paper is to analyze and numerically estimate the fatigue life of inner sleeve in the presence of widespread damage. When damage is detected, two repair methods are employed: welding of single cracks (manual TIG welding) and the use of welded patches. Using numerical simulations based on extended finite element method (XFEM) and finite element method (FEM), fatigue life of repaired inner sleeves were estimated. Based on the comparison of the results obtained in simulations, it was shown that the repair method with welded patches provides longer fatigue life of widespread damaged nozzle than the other with welding of cracks. PB - Elsevier Science Bv, Amsterdam C3 - Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1) T1 - Fatigue life assessment of the structure with widespread damage exposed to high temperature EP - 408 SP - 402 VL - 26 DO - 10.1016/j.prostr.2020.06.051 ER -
@conference{ author = "Grbović, Aleksandar and Bozić, Z. and Kirin, Snežana and Kastratović, Gordana and Sedmak, Aleksandar and Vidanović, Nenad", year = "2020", abstract = "The exhaust nozzle represents a part of a jet engine which is crucial to its overall performance, since it accelerates the flow of hot gases out of the engine and creates a thrust. During its long service, it is exposed to elevated temperatures and high compressive and hoop stresses, which makes the cracks' occurrence in the exhaust nozzle's inner sleeve almost unavoidable. The aim of this paper is to analyze and numerically estimate the fatigue life of inner sleeve in the presence of widespread damage. When damage is detected, two repair methods are employed: welding of single cracks (manual TIG welding) and the use of welded patches. Using numerical simulations based on extended finite element method (XFEM) and finite element method (FEM), fatigue life of repaired inner sleeves were estimated. Based on the comparison of the results obtained in simulations, it was shown that the repair method with welded patches provides longer fatigue life of widespread damaged nozzle than the other with welding of cracks.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1)", title = "Fatigue life assessment of the structure with widespread damage exposed to high temperature", pages = "408-402", volume = "26", doi = "10.1016/j.prostr.2020.06.051" }
Grbović, A., Bozić, Z., Kirin, S., Kastratović, G., Sedmak, A.,& Vidanović, N.. (2020). Fatigue life assessment of the structure with widespread damage exposed to high temperature. in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1) Elsevier Science Bv, Amsterdam., 26, 402-408. https://doi.org/10.1016/j.prostr.2020.06.051
Grbović A, Bozić Z, Kirin S, Kastratović G, Sedmak A, Vidanović N. Fatigue life assessment of the structure with widespread damage exposed to high temperature. in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1). 2020;26:402-408. doi:10.1016/j.prostr.2020.06.051 .
Grbović, Aleksandar, Bozić, Z., Kirin, Snežana, Kastratović, Gordana, Sedmak, Aleksandar, Vidanović, Nenad, "Fatigue life assessment of the structure with widespread damage exposed to high temperature" in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1), 26 (2020):402-408, https://doi.org/10.1016/j.prostr.2020.06.051 . .