PSI - Issue 58

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ScienceDirect

Procedia Structural Integrity 58 (2024) 61–67 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

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© 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 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the ICSID 2023 Organizers. Keywords: Agricultural; disc mower; finite element analysis; weld fatigue Abstract Agricultural disc mowers are used to cut crops in the field and are exposed to cyclic loading during their lifetime. A cutterbar is an essential part of a disc mower and consists of multiple parts welded together. This paper aims to develop a finite element model of a cutterbar, which can be used for fatigue assessments of the welded joints. A quasi-static experiment has been performed to validate the finite element model based on strain measurements. The finite element model has been updated using a parameter based method as several discrepancies were observed. The updated model reduces the mean absolute error of strain values from 7.5 % to 4.7 %. The hot spot approach has then been used to analyze three di ff erent weld locations on the cutterbar. The fatigue criterion by the International Institute of Welding has been used to determine the relative fatigue lives of the weld locations. The back weld is shown to be most exposed, which fits well with results from prior experiments. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the ICSID 2023 Organizers. Keywords: Agricultural; disc mower; finite element analysis; weld fatigue 7th International Conference on Structural Integrity and Durability (ICSID 2023) Finite element validation and model updating of beam in agricultural mower for fatigue assessment J.R. Steengaard a , A.P.K. Holm b , V. Arora a , M.L. Larsen a,b, ∗ a University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark b Kverneland Group Kerteminde A / S, Taarupstrandvej 25, 5300 Kerteminde, Denmark Abstract Agricultural disc mowers are used to cut crops in the field and are exposed to cyclic loading during their lifetime. A cutterbar is an essential part of a disc mower and consists of multiple parts welded together. This paper aims to develop a finite element model of a cutterbar, which can be used for fatigue assessments of the welded joints. A quasi-static experiment has been performed to validate the finite element model based on strain measurements. The finite element model has been updated using a parameter based method as several discrepancies were observed. The updated model reduces the mean absolute error of strain values from 7.5 % to 4.7 %. The hot spot approach has then been used to analyze three di ff erent weld locations on the cutterbar. The fatigue criterion by the International Institute of Welding has been used to determine the relative fatigue lives of the weld locations. The back weld is shown to be most exposed, which fits well with results from prior experiments. 7th International Conference on Structural Integrity and Durability (ICSID 2023) Finite element validation and model updating of beam in agricultural mower for fatigue assessment J.R. Steengaard a , A.P.K. Holm b , V. Arora a , M.L. Larsen a,b, ∗ a University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark b Kverneland Group Kerteminde A / S, Taarupstrandvej 25, 5300 Kerteminde, Denmark Agricultural disc mowers are mounted on tractors and used to cut crops, such as grass, in the field, see Fig. 1a. During operation, a mower is subjected to cyclic loads from the tractor’s power take o ff (PTO), crops hitting the front, and upward pressure from the ground. Agricultural machines in general are subjected to cyclic loading. For example, irregularities of the field surface are shown by Paraforos et al. (2014) to increase the fatigue damage. A central component of a disc mower is the cutterbar beam, which is inside the mower, transverse to the direction of travel, see Fig. 1b. A cutterbar is equipped with rotating discs with knives that cut the crops. The cutterbar beam consists of welded components. Welds are prone to fatigue damage due to the cyclic loading (Maddox (1991)). Di ff erent agricultural machines have been analyzed for fatigue. These analyses are either on individual components (Tarasiuk et al. (2013); Koyuncu et al. (2012)) or on entire implements (Paraforos et al. (2014)). This paper aims to Agricultural disc mowers are mounted on tractors and used to cut crops, such as grass, in the field, see Fig. 1a. During operation, a mower is subjected to cyclic loads from the tractor’s power take o ff (PTO), crops hitting the front, and upward pressure from the ground. Agricultural machines in general are subjected to cyclic loading. For example, irregularities of the field surface are shown by Paraforos et al. (2014) to increase the fatigue damage. A central component of a disc mower is the cutterbar beam, which is inside the mower, transverse to the direction of travel, see Fig. 1b. A cutterbar is equipped with rotating discs with knives that cut the crops. The cutterbar beam consists of welded components. Welds are prone to fatigue damage due to the cyclic loading (Maddox (1991)). Di ff erent agricultural machines have been analyzed for fatigue. These analyses are either on individual components (Tarasiuk et al. (2013); Koyuncu et al. (2012)) or on entire implements (Paraforos et al. (2014)). This paper aims to 1. Introduction 1. Introduction

∗ Corresponding author. Tel.: + 45 31 53 32 85. E-mail address: mlla@sdu.dk ∗ Corresponding author. Tel.: + 45 31 53 32 85. E-mail address: mlla@sdu.dk

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 10.1016/j.prostr.2024.05.011 2210-7843 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the ICSID 2023 Organizers. 2210-7843 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the ICSID 2023 Organizers.