Failure of the bucket wheel excavator buckets
Само за регистроване кориснике
2018
Чланак у часопису (Објављена верзија)
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Buckets are a vital substructure of all digging machines, and are intended for the realisation of the fundamental machine function - soil excavation. This paper presents the results of the experimental-numerical investigation of the cause of the bucket wheel excavator SRs 470 buckets failure. The chemical composition and mechanical properties, the impact toughness, hardness, tendency to cracks and the microstructure were determined using appropriate tests. Experimental examinations of working and residual stresses were performed using strain gauges. The superposition of the experimentally determined working and residual stresses and the calculation of the total principal stresses were conducted using the originally developed procedure presented in this paper. The bucket working stress state was calculated by applying the linear finite element method. Conclusions based on the investigation results show that the main reasons for the buckets failure were the 'design-in defects' - oversigh...ts made during the procedures of geometrical shaping and material selection. Furthermore, high values of residual stresses, as well as the cold cracking observed on the welded joint of the knife and the bucket body, suggest that the 'manufacturing-in defects' also played a significant role in the failure. The superposition of influences of the 'design-in defects' and the 'manufacturing-in defects' has conditioned the appearance and propagation of long-term fatigue cracks, leading to the total destruction of the buckets. The fact that buckets' failure appeared due to oversights made during geometrical shaping, material selection and manufacturing further points to the importance of the critical approach implementation during the design phase of the earthmoving machines working devices.
Кључне речи:
Linear finite element analysis / Failure / Experimental investigation / Bucket / Bucket wheel excavatorИзвор:
Engineering Failure Analysis, 2018, 84, 247-261Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
DOI: 10.1016/j.engfailanal.2017.11.017
ISSN: 1350-6307
WoS: 000418487200021
Scopus: 2-s2.0-85036450387
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Bošnjak, Srđan AU - Arsić, Miodrag A. AU - Gnjatović, Nebojša AU - Milenović, Ivan Lj. AU - Arsić, Dušan M. PY - 2018 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2912 AB - Buckets are a vital substructure of all digging machines, and are intended for the realisation of the fundamental machine function - soil excavation. This paper presents the results of the experimental-numerical investigation of the cause of the bucket wheel excavator SRs 470 buckets failure. The chemical composition and mechanical properties, the impact toughness, hardness, tendency to cracks and the microstructure were determined using appropriate tests. Experimental examinations of working and residual stresses were performed using strain gauges. The superposition of the experimentally determined working and residual stresses and the calculation of the total principal stresses were conducted using the originally developed procedure presented in this paper. The bucket working stress state was calculated by applying the linear finite element method. Conclusions based on the investigation results show that the main reasons for the buckets failure were the 'design-in defects' - oversights made during the procedures of geometrical shaping and material selection. Furthermore, high values of residual stresses, as well as the cold cracking observed on the welded joint of the knife and the bucket body, suggest that the 'manufacturing-in defects' also played a significant role in the failure. The superposition of influences of the 'design-in defects' and the 'manufacturing-in defects' has conditioned the appearance and propagation of long-term fatigue cracks, leading to the total destruction of the buckets. The fact that buckets' failure appeared due to oversights made during geometrical shaping, material selection and manufacturing further points to the importance of the critical approach implementation during the design phase of the earthmoving machines working devices. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Engineering Failure Analysis T1 - Failure of the bucket wheel excavator buckets EP - 261 SP - 247 VL - 84 DO - 10.1016/j.engfailanal.2017.11.017 ER -
@article{ author = "Bošnjak, Srđan and Arsić, Miodrag A. and Gnjatović, Nebojša and Milenović, Ivan Lj. and Arsić, Dušan M.", year = "2018", abstract = "Buckets are a vital substructure of all digging machines, and are intended for the realisation of the fundamental machine function - soil excavation. This paper presents the results of the experimental-numerical investigation of the cause of the bucket wheel excavator SRs 470 buckets failure. The chemical composition and mechanical properties, the impact toughness, hardness, tendency to cracks and the microstructure were determined using appropriate tests. Experimental examinations of working and residual stresses were performed using strain gauges. The superposition of the experimentally determined working and residual stresses and the calculation of the total principal stresses were conducted using the originally developed procedure presented in this paper. The bucket working stress state was calculated by applying the linear finite element method. Conclusions based on the investigation results show that the main reasons for the buckets failure were the 'design-in defects' - oversights made during the procedures of geometrical shaping and material selection. Furthermore, high values of residual stresses, as well as the cold cracking observed on the welded joint of the knife and the bucket body, suggest that the 'manufacturing-in defects' also played a significant role in the failure. The superposition of influences of the 'design-in defects' and the 'manufacturing-in defects' has conditioned the appearance and propagation of long-term fatigue cracks, leading to the total destruction of the buckets. The fact that buckets' failure appeared due to oversights made during geometrical shaping, material selection and manufacturing further points to the importance of the critical approach implementation during the design phase of the earthmoving machines working devices.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Engineering Failure Analysis", title = "Failure of the bucket wheel excavator buckets", pages = "261-247", volume = "84", doi = "10.1016/j.engfailanal.2017.11.017" }
Bošnjak, S., Arsić, M. A., Gnjatović, N., Milenović, I. Lj.,& Arsić, D. M.. (2018). Failure of the bucket wheel excavator buckets. in Engineering Failure Analysis Pergamon-Elsevier Science Ltd, Oxford., 84, 247-261. https://doi.org/10.1016/j.engfailanal.2017.11.017
Bošnjak S, Arsić MA, Gnjatović N, Milenović IL, Arsić DM. Failure of the bucket wheel excavator buckets. in Engineering Failure Analysis. 2018;84:247-261. doi:10.1016/j.engfailanal.2017.11.017 .
Bošnjak, Srđan, Arsić, Miodrag A., Gnjatović, Nebojša, Milenović, Ivan Lj., Arsić, Dušan M., "Failure of the bucket wheel excavator buckets" in Engineering Failure Analysis, 84 (2018):247-261, https://doi.org/10.1016/j.engfailanal.2017.11.017 . .