PSI - Issue 58

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ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 58 (2024) 54–60

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICSID 2023 Organizers Abstrac In the article, failure analysis of the discharge boom suspension axle was presented. Such failures are expensive and time consuming. In the first step, fracture and material microstructure analyses were conducted. Most of the fracture was typical fatigue crack. The origin point of this crack was in the notch of the damaged axle. Microstructure analysis showed that there is a Widmanstätten pattern, which is unacceptable in case of highly loaded parts due to sensitivity to fatigue crack propagation. This, in conjunction with calculated high von Misses stress value (about 471 MPa) in the notch, was a reason of described failure. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICSID 2023 Organizers Keywords: Carrying structure; fatigue fracture; FEM analysis 1. Introduction Engineering objects are very often complex structures. Their safety work is influenced by many factors that may or may not depend on people. These factors include, among others, the quality of the project, production quality or recognition of external factors. It is difficult to clearly indicate which of them is the most important. A device made according to a flawless design, used in conditions for which it was not created, will be damaged with high probability. On the other hand, even a device made with the highest quality and accuracy according to an erroneous design is likely to be damaged. Failures and damage have always been related to engineering. Many descriptions of failures and Abstrac In the article, failure analysis of the discharge boom suspension axle was presented. Such failures are expensive and time consuming. In the first step, fracture and material microstructure analyses were conducted. Most of the fracture was typical fatigue crack. The origin point of this crack was in the notch of the damaged axle. Microstructure analysis showed that there is a Widmanstätten pattern, which is unacceptable in case of highly loaded parts due to sensitivity to fatigue crack propagation. This, in conjunction with calculated high von Misses stress value (about 471 MPa) in the notch, was a reason of described failure. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICSID 2023 Organizers Keywords: Carrying structure; fatigue fracture; FEM analysis 1. Introduction Engineering objects are very often complex structures. Their safety work is influenced by many factors that may or may not depend on people. These factors include, among others, the quality of the project, production quality or recognition of external factors. It is difficult to clearly indicate which of them is the most important. A device made according to a flawless design, used in conditions for which it was not created, will be damaged with high probability. On the other hand, even a device made with the highest quality and accuracy according to an erroneous design is likely to be damaged. Failures and damage have always been related to engineering. Many descriptions of failures and 7th International Conference on Structural Integrity and Durability (ICSID 2023) Design examination, failure analysis and repair of the discharge boom suspension of the bucket wheel excavator Włodzimierz Dudziński a , Przemysław Moczko b , Piotr Odyjas b , Maciej Olejnik b , Damian Pietrusiak b , Jędrzej Więckowski b * a Collegium Witelona, 5A Sejmowa st, 59-220 Legnica, Polan b Wroc ł aw University of Science and Technology, 27 wybrze ż e Stanis ł awa Wyspia ń skiego st, 50-370 Wroc ł aw, Poland 7th International Conference on Structural Integrity and Durability (ICSID 2023) Design examination, failure analysis and repair of the discharge boom suspension of the bucket wheel excavator Włodzimierz Dudziński a , Przemysław Moczko b , Piotr Odyjas b , Maciej Olejnik b , Damian Pietrusiak b , Jędrzej Więckowski b * a Collegium Witelona, 5A Sejmowa st, 59-220 Legnica, Polan b Wroc ł aw University of Science and Technology, 27 wybrze ż e Stanis ł awa Wyspia ń skiego st, 50-370 Wroc ł aw, Poland

* Corresponding author.tel.: +48-71-320-38-60 E-mail address: jedrzej.wieckowski@pwr.edu.pl * Corresponding author.tel.: +48-71-320-38-60 E-mail address: jedrzej.wieckowski@pwr.edu.pl

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICSID 2023 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICSID 2023 Organizers

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