Fatigue life evaluation of web butt welding structure on boom of excavator by hot spot stress approach

Zhu, Q. J.; Lü, Peng; Xiang, Qingyi

doi:10.1016/j.engfailanal.2020.104547

Cited by 14 publications

(3 citation statements)

References 7 publications

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“…The literature [10], [11]used Monte Carlo simulation to estimate the life and reliability of an aero-engine turbine disk. The hot spot stress method was employed in the literature [12], [13]to evaluate the fatigue life of an excavator arm. A probabilistic method for thermal fatigue design of nuclear components was established, and a dual time and frequency domain method was proposed for thermal fatigue reliability analysis [14].…”

Section: Introductionmentioning

confidence: 99%

Lifetime Reliability of Hydraulic Excavators’ Actuator

Liu,

Zeng,

Qin

et al. 2023

IEEE Access

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Due to the harsh working environment of hydraulic excavators, the actuators are subjected to high intensity and long duration, resulting in fatigue-induced cracks, fractures, and other failures, leading to work interruptions and delays, reducing the operational efficiency of the excavator. Therefore, fatigue life prediction is of great significance in improving its safety, reliability, and operational efficiency. The load-time history at each articulation point of the working mechanism is the basis for fatigue life prediction. Due to the complex and variable forces experienced during the excavation process, it is difficult to obtain the working load spectrum through direct measurement, which can provide a more realistic prediction of the fatigue life. In this study, the excavation process of different materials under different working conditions of the excavator is studied to obtain a more accurate load spectrum and complete the life prediction of the working mechanism based on the discrete element principle. Taking the hydraulic excavator's actuators as the research object, the load spectrum of each articulation point under extreme conditions such as eccentric load and impact is obtained for different excavation materials, and the minimum life prediction of the boom is completed. Genetic algorithm (GA) and Self-Adaptive Fast Fireworks Algorithm (SF-FWA) are used for life prediction, and function fitting is performed using historical failure data for life calculation and comparative analysis. The analysis shows that SF-FWA is more effective than GA. The advanced algorithm provides more accurate predicted values for estimating fatigue life, but less accurate for estimating MTBF.

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Section: Introductionmentioning

confidence: 99%

Lifetime Reliability of Hydraulic Excavators’ Actuator

Liu,

Zeng,

Qin

et al. 2023

IEEE Access

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“…Detailed investigation was carried out by finite element analysis using a numerical simulation software to understand the stress developed in the arm for all design considerations. Modeling is performed by changing the shape of the arms [18][19][20], modifying the material of construction [21,22], or by changing both them [23]. A finite element analysis of cutting teeth in which the linear increase in lateral force is taken into account [24].…”

Section: Introductionmentioning

confidence: 99%

Modeling of an Automatic Excavation Mechanism for a Parallelepiped Foundation - Application in Building Construction Preparation

Bendriss¹,

Aidaoui²,

Abbès³

2022

JESA

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Foundation excavation and general earthworks are activities that involve the machine operator in a series of repetitive and tedious operations, suggesting opportunities for automation through by the introduction of robotic technologies with subsequent improvements in the design and machine use, especially, in dangerous environments working. Automation of excavation operations can be realized by an automatically controlled excavator system that is able to perform autonomously a planned digging work. In this study, a modeling of an excavation mechanism has been represented, where the purpose is to automatically excavate a parallelepiped-shaped foundation. From existing excavation machinery in the industry, the manipulator arm of a backhoe was chosen to do the modeling. Starting from the basic input geometric parameters of the foundation to be excavated, the system gives as outputs results: A simulation of the various mechanism components movement, in addition to the automatic excavation trajectory of the parallelepiped foundation. Finally, from the soils properties of the western region of Algeria that they were measured experimentally, a resistance simulation of the various components of the mechanism was carried, to test the reliability of the mechanism in terms of deformation and Von Mises stress.

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“…The working environment of hydraulic excavator is complex and harsh, and each movement unit of working device carries huge alternating load. The greater load level and the higher frequency of alternating, the more likely fatigue cracks will be produced and the greater fatigue damage probability will be increased 33 . In this paper, the key component of excavator working device boom is studied.…”

Section: Introductionmentioning

confidence: 99%

Reliability analysis of excavator boom considering mixed uncertain variables

Zhang

Liu

et al. 2020

Quality & Reliability Eng

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There are differences among sampling data and representation types of uncertain interval, fuzzy and random variables, which increases the complexity of structure reliability analysis. A α, β‐Cut‐FORM is proposed to analyze structure reliability considering the mixed uncertain variables. Fuzzy variables are optimized on the interval under two cut sets (α, β) based on the theory of cut set optimization. Interval variables are modeled with probability using a uniformity method. The proposed method involves the nested probabilistic analysis and interval analysis. The first‐order reliability method (FORM) is used for probabilistic analysis and nonlinear optimization is used for interval analysis. The excavator boom performance function is established for reliability analysis considering the mixed uncertain input variables, which verifies the effectiveness and advantages of the proposed method. And it has great application for safe and reliable design of excavator boom.

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Fatigue life evaluation of web butt welding structure on boom of excavator by hot spot stress approach

Cited by 14 publications

References 7 publications

Lifetime Reliability of Hydraulic Excavators’ Actuator

Lifetime Reliability of Hydraulic Excavators’ Actuator

Modeling of an Automatic Excavation Mechanism for a Parallelepiped Foundation - Application in Building Construction Preparation

Reliability analysis of excavator boom considering mixed uncertain variables

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