Structural Integrity Analysis of a Kaplan Turbine Cover
Само за регистроване кориснике
2022
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
During recent revitalization of Kaplan turbine aggregate made of structural steel St 3 (GOST standard), experimental investigation was performed. Base metal and welded joints were tested by non-destructive methods (NDT), and by testing of mechanical properties, including fracture mechanics parameters. Ultrasound testing (UT) indicated lack of penetration in weld metal and lamellar tearing in base metal. The latter one was in accordance with the reduced contraction of the base metal, as obtained by tensile testing, being significantly lower than the specified value. Also, fatigue crack threshold value was approximately two times smaller than expected for St 3 steel, whereas crack growth rate was significantly higher. In addition, numerical analysis of the cover was performed in different turbine operational modes to get all necessary stress distributions and enable structural integrity and life analysis. Despite significant degradation of the base metal and defects in weld joints, this ...analysis has shown that structural integrity of turbine cover is not jeopardized, not only because dynamic loading is just 5% higher than the static one, but also because defects in weld root are much shorter than critical crack lengths, as evaluated by LEFM calculation
Кључне речи:
Welded joint defects / Structural integritz assessment / Kaplan turbine coverИзвор:
Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021), 2022, 37, 263-268Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200105 (Универзитет у Београду, Машински факултет) (RS-MESTD-inst-2020-200105)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200213 (Иновациони центар Машинског факултета у Београду доо) (RS-MESTD-inst-2020-200213)
DOI: 10.1016/j.prostr.2022.01.083
ISSN: 2452-3216
WoS: 000766311100034
Scopus: 2-s2.0-85129471309
Институција/група
Inovacioni centarTY - CONF AU - Sedmak, Aleksandar AU - Arsić, Miodrag AU - Milovanović, Nikola AU - Opačić, Mirjana AU - Đorđević, Branislav R. PY - 2022 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3736 AB - During recent revitalization of Kaplan turbine aggregate made of structural steel St 3 (GOST standard), experimental investigation was performed. Base metal and welded joints were tested by non-destructive methods (NDT), and by testing of mechanical properties, including fracture mechanics parameters. Ultrasound testing (UT) indicated lack of penetration in weld metal and lamellar tearing in base metal. The latter one was in accordance with the reduced contraction of the base metal, as obtained by tensile testing, being significantly lower than the specified value. Also, fatigue crack threshold value was approximately two times smaller than expected for St 3 steel, whereas crack growth rate was significantly higher. In addition, numerical analysis of the cover was performed in different turbine operational modes to get all necessary stress distributions and enable structural integrity and life analysis. Despite significant degradation of the base metal and defects in weld joints, this analysis has shown that structural integrity of turbine cover is not jeopardized, not only because dynamic loading is just 5% higher than the static one, but also because defects in weld root are much shorter than critical crack lengths, as evaluated by LEFM calculation PB - Elsevier Science Bv, Amsterdam C3 - Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021) T1 - Structural Integrity Analysis of a Kaplan Turbine Cover EP - 268 SP - 263 VL - 37 DO - 10.1016/j.prostr.2022.01.083 ER -
@conference{ author = "Sedmak, Aleksandar and Arsić, Miodrag and Milovanović, Nikola and Opačić, Mirjana and Đorđević, Branislav R.", year = "2022", abstract = "During recent revitalization of Kaplan turbine aggregate made of structural steel St 3 (GOST standard), experimental investigation was performed. Base metal and welded joints were tested by non-destructive methods (NDT), and by testing of mechanical properties, including fracture mechanics parameters. Ultrasound testing (UT) indicated lack of penetration in weld metal and lamellar tearing in base metal. The latter one was in accordance with the reduced contraction of the base metal, as obtained by tensile testing, being significantly lower than the specified value. Also, fatigue crack threshold value was approximately two times smaller than expected for St 3 steel, whereas crack growth rate was significantly higher. In addition, numerical analysis of the cover was performed in different turbine operational modes to get all necessary stress distributions and enable structural integrity and life analysis. Despite significant degradation of the base metal and defects in weld joints, this analysis has shown that structural integrity of turbine cover is not jeopardized, not only because dynamic loading is just 5% higher than the static one, but also because defects in weld root are much shorter than critical crack lengths, as evaluated by LEFM calculation", publisher = "Elsevier Science Bv, Amsterdam", journal = "Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021)", title = "Structural Integrity Analysis of a Kaplan Turbine Cover", pages = "268-263", volume = "37", doi = "10.1016/j.prostr.2022.01.083" }
Sedmak, A., Arsić, M., Milovanović, N., Opačić, M.,& Đorđević, B. R.. (2022). Structural Integrity Analysis of a Kaplan Turbine Cover. in Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021) Elsevier Science Bv, Amsterdam., 37, 263-268. https://doi.org/10.1016/j.prostr.2022.01.083
Sedmak A, Arsić M, Milovanović N, Opačić M, Đorđević BR. Structural Integrity Analysis of a Kaplan Turbine Cover. in Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021). 2022;37:263-268. doi:10.1016/j.prostr.2022.01.083 .
Sedmak, Aleksandar, Arsić, Miodrag, Milovanović, Nikola, Opačić, Mirjana, Đorđević, Branislav R., "Structural Integrity Analysis of a Kaplan Turbine Cover" in Procedia Structural Integrity - 4th International Conference on Structural Integrity (Icsi 2021), 37 (2022):263-268, https://doi.org/10.1016/j.prostr.2022.01.083 . .