Influence of Corrosion on Fatigue of the Fastening Bolts

Lachowicz, M.

doi:10.3390/ma14061485

Cited by 20 publications

(10 citation statements)

References 33 publications

(64 reference statements)

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“…where σ ac_max is the maximum permissible alternation value for unlimited life (Equation ( 9)). Based on Equation (10), the expression that gives the number of cycles reached by the joint as a function of the additional load Sx supported by the bolt is:…”

Section: Calculation Of the Bolt's Useful Lifementioning

confidence: 99%

“…such that, for the case of 10 6 cycles (i.e., unlimited life), the equation that gives the maximum load (Pmax) to apply is: Based on Equation (10), the expression that gives the number of cycles reached by the joint as a function of the additional load S x supported by the bolt is:…”

Section: Calculation Of the Bolt's Useful Lifementioning

confidence: 99%

“…Therefore, it is necessary to assess the fatigue behaviour of this type of joint, especially depending on the features that determine its operation (the lever lengths). There are numerous research papers on the behaviour of classic bolted connections [10][11][12][13][14][15][16][17], many of them focused on fatigue. For example, Zampieri et al [18] carried out a review of the fatigue resistance of bolted shear connections, Bartsch et al [19] performed an analysis of the fatigue strength of end plate connections with prestressed bolts, and Liu et al [20] showed a simplified modelling strategy based on continuous damage mechanics for the evaluation of cumulative fatigue damage in metal bolted joints.…”

Section: Introductionmentioning

confidence: 99%

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Analytical Model for the Fatigue Analysis of Steel Joints by Clamps According to the Lever Length

et al. 2021

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Among the most commonly used materials in the construction of structures in the last two centuries are iron and steel. Clamp joints are a suitable type of joint when it is necessary to rehabilitate or modify a historical steel structure for new uses, reinforcing or modifying it with new beams, without the need to drill or weld on the original structure. The clamps allow beams to be joined with a flange (such as I-beams) without the need for any prior operation on the beams and allow the manufacture of completely removable and reconfigurable structures. Developing and analysing this type of fully removable and reconfigurable structure is necessary. To date, no studies have been carried out on the fatigue behaviour of steel joints by clamps, especially taking into account their main geometric characteristics, such as the size of the clamp levers. In this work, an analytical model is proposed that allows for the analysis of the number of cycles and the fatigue limit of clamp joints as a function of the size of the clamp levers. In addition, various fatigue tests are performed with different clamp sizes. The experimental results are compared with those obtained with the proposed methodology. Finally, the relationships between the lever length and the fatigue behaviour of the clamp joints have been determined. It is concluded that an increase in the size of the front lever is associated to a decrease in the fatigue limit. On the contrary, if the size of the rear lever is increased, the fatigue limit of the joint increases. In general, according to the obtained results, the resistance of the joint can be reduced to approximately one third when it is subjected to fatigue loads.

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Section: Calculation Of the Bolt's Useful Lifementioning

confidence: 99%

Section: Calculation Of the Bolt's Useful Lifementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analytical Model for the Fatigue Analysis of Steel Joints by Clamps According to the Lever Length

et al. 2021

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“…Bolted connections are often used in many structures exposed to various, including aggressive, environmental conditions [1]. In such cases, the use of anti-corrosion coatings on the bolt surface is indispensable [2,3].…”

Section: Introductionmentioning

confidence: 99%

Testing the Mechanical Properties of High-Strength Zinc-Coated Bolts: FEM Approach

Grzejda

Kobielarz

2022

Coatings

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High-strength zinc-coated bolts are used as fasteners in prestressed multi-bolted connections. This communication deals with modelling such bolts using the finite element method. The analyses were performed for a zinc-coated M12 HV10.9 bolt. Coatings with the following thicknesses were considered: 40, 60, 84 and 92 µm. The influence of coating thickness on the selected mechanical properties of the bolt was investigated. The corresponding properties of an uncoated bolt were taken as a reference. It is shown that the use of a zinc coating with a standardised thickness is associated with a reduction in bolt stiffness of up to 11.2%.

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“…The extension of the root of the radius of the bolt root improved the fatigue limit of the bolt by more than 30% because both the stress amplitude and the mean stress can be reduced. Other articles deal with anti-loosening problems [21][22][23][24][25] or analyze the performance of specific threaded joint fatigue strength [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Durability of Threaded Joints

et al. 2021

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The article deals with the determination of the resistance to cyclic loading of the threaded joints of pressure vessels and defective elements according to the failure mechanics criteria. Theoretical and experimental studies do not provide a sufficient basis for the existing calculation methods for the cyclic strength of the threaded joints of pressure vessels. The short crack kinetics in the threaded joints, a shakedown in one of the joint elements of pressure vessels, i.e., in the bolt or stud, has not been studied sufficiently. The calculation methods designed and improved within the study were based on theoretical and experimental investigations and were simplified for convenient application to engineering practice. The findings could be used to investigate the shakedown of studs of a different cross-section with an initiating and propagating crack. Value: the developed model for the assessment of durability of the threaded joints covers the patterns of resistance to cyclic failure (limit states: crack initiation, propagation, final failure) and shakedown (limit states: progressive shape change and plastic failure). Analysis-based solutions of plastic failure conditions and progressive shape change were accurate (the result was reached using a two-sided approach; the solutions were obtained in view of the parameters of the cyclic failure process in the stud (bolt) and based on experimental investigations of the threaded joints).

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Influence of Corrosion on Fatigue of the Fastening Bolts

Cited by 20 publications

References 33 publications

Analytical Model for the Fatigue Analysis of Steel Joints by Clamps According to the Lever Length

Analytical Model for the Fatigue Analysis of Steel Joints by Clamps According to the Lever Length

Testing the Mechanical Properties of High-Strength Zinc-Coated Bolts: FEM Approach

Assessment of the Durability of Threaded Joints

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