Fracture analysis of the pulley of a bucket wheel boom hoist system
Апстракт
This paper presents the results of the pulley fracture analysis. Experimental investigations confirmed that the chemical composition and basic mechanical properties of the pulley material, except the impact energy at a temperature of - 20 degrees C, meet the requirements of the corresponding standard. The impact energy value at the temperature of - 20 degrees C is for approximate to 45% lower than the prescribed value which has considerable influence on the appearance of the brittle fracture, especially having in mind the fact that the bucket wheel excavators operate at low temperatures. Metallographic examinations as well as magnetic particle inspections indicated that initial cracks in the welded joints occurred during the manufacture of the pulleys. Characteristic levels of the rope load cycle are obtained by using in-house software which includes the dynamic effects of the resistance-to-excavation. The FEA results pointed out that in the representative load cases the combinations o...f the mean stress and the alternating stress in the pulley critical zone lie considerably below the limit line of the modified Goodman's diagram. The conclusion, based on the presented results, is that the fracture of the pulley appeared as the result of the 'manufacturing-in' defects.
Кључне речи:
pulley fracture / FE stress analyses / experimental investigations / bucket wheel excavatorИзвор:
Eksploatacja I Niezawodnosc-Maintenance and Reliability, 2016, 18, 2, 155-163Издавач:
- Polish Maintenance Soc, Lublin
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
DOI: 10.17531/ein.2016.2.1
ISSN: 1507-2711
WoS: 000372429700001
Scopus: 2-s2.0-84961848581
Институција/група
Inovacioni centarTY - JOUR AU - Bošnjak, Srđan AU - Arsić, Miodrag AU - Savićević, Sreten AU - Milojević, Goran AU - Arsić, Dušan PY - 2016 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2433 AB - This paper presents the results of the pulley fracture analysis. Experimental investigations confirmed that the chemical composition and basic mechanical properties of the pulley material, except the impact energy at a temperature of - 20 degrees C, meet the requirements of the corresponding standard. The impact energy value at the temperature of - 20 degrees C is for approximate to 45% lower than the prescribed value which has considerable influence on the appearance of the brittle fracture, especially having in mind the fact that the bucket wheel excavators operate at low temperatures. Metallographic examinations as well as magnetic particle inspections indicated that initial cracks in the welded joints occurred during the manufacture of the pulleys. Characteristic levels of the rope load cycle are obtained by using in-house software which includes the dynamic effects of the resistance-to-excavation. The FEA results pointed out that in the representative load cases the combinations of the mean stress and the alternating stress in the pulley critical zone lie considerably below the limit line of the modified Goodman's diagram. The conclusion, based on the presented results, is that the fracture of the pulley appeared as the result of the 'manufacturing-in' defects. PB - Polish Maintenance Soc, Lublin T2 - Eksploatacja I Niezawodnosc-Maintenance and Reliability T1 - Fracture analysis of the pulley of a bucket wheel boom hoist system EP - 163 IS - 2 SP - 155 VL - 18 DO - 10.17531/ein.2016.2.1 ER -
@article{ author = "Bošnjak, Srđan and Arsić, Miodrag and Savićević, Sreten and Milojević, Goran and Arsić, Dušan", year = "2016", abstract = "This paper presents the results of the pulley fracture analysis. Experimental investigations confirmed that the chemical composition and basic mechanical properties of the pulley material, except the impact energy at a temperature of - 20 degrees C, meet the requirements of the corresponding standard. The impact energy value at the temperature of - 20 degrees C is for approximate to 45% lower than the prescribed value which has considerable influence on the appearance of the brittle fracture, especially having in mind the fact that the bucket wheel excavators operate at low temperatures. Metallographic examinations as well as magnetic particle inspections indicated that initial cracks in the welded joints occurred during the manufacture of the pulleys. Characteristic levels of the rope load cycle are obtained by using in-house software which includes the dynamic effects of the resistance-to-excavation. The FEA results pointed out that in the representative load cases the combinations of the mean stress and the alternating stress in the pulley critical zone lie considerably below the limit line of the modified Goodman's diagram. The conclusion, based on the presented results, is that the fracture of the pulley appeared as the result of the 'manufacturing-in' defects.", publisher = "Polish Maintenance Soc, Lublin", journal = "Eksploatacja I Niezawodnosc-Maintenance and Reliability", title = "Fracture analysis of the pulley of a bucket wheel boom hoist system", pages = "163-155", number = "2", volume = "18", doi = "10.17531/ein.2016.2.1" }
Bošnjak, S., Arsić, M., Savićević, S., Milojević, G.,& Arsić, D.. (2016). Fracture analysis of the pulley of a bucket wheel boom hoist system. in Eksploatacja I Niezawodnosc-Maintenance and Reliability Polish Maintenance Soc, Lublin., 18(2), 155-163. https://doi.org/10.17531/ein.2016.2.1
Bošnjak S, Arsić M, Savićević S, Milojević G, Arsić D. Fracture analysis of the pulley of a bucket wheel boom hoist system. in Eksploatacja I Niezawodnosc-Maintenance and Reliability. 2016;18(2):155-163. doi:10.17531/ein.2016.2.1 .
Bošnjak, Srđan, Arsić, Miodrag, Savićević, Sreten, Milojević, Goran, Arsić, Dušan, "Fracture analysis of the pulley of a bucket wheel boom hoist system" in Eksploatacja I Niezawodnosc-Maintenance and Reliability, 18, no. 2 (2016):155-163, https://doi.org/10.17531/ein.2016.2.1 . .