Damaging fatigue cycles determination for random service loadings using mixed Weibull analysis

Mahmud, Mohd Izwan; Abdullah, Shahrum; Yunoh, Mohd Faridz Mod; Ariffin, A. K.; Nopiah, Z.M.

doi:10.15282/ijame.13.3.2016.8.0298

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…Fatigue occurs when a material is subjected to cyclical loads and is an irreversible and inevitable phenomenon in the process of use. Several fatigue life estimation models based on the Weibull statistical distribution, modified Wöhler curve and specified endurance function have been reviewed for applications in steel alloys [17,18]. An integrated continuum mechanics model with a genetic algorithm was examined for the multiaxial fatigue response of steel samples [19,20,21,22,23].…”

Section: Fig 3 Views Of Rope Cross-sections (Top) and Surfaces (Botto...mentioning

confidence: 99%

Fatigue Life of Compacted Wire Ropes for Applications in Deep Mining

Kubiś

Olszyna

Szade

et al. 2023

Management Systems in Production Engineering

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Recent months have highlighted the progressing energy crisis across Europe in connection with the severe sanctions imposed on the import of hydrocarbons and coal from Russia. This is particularly visible in Poland, where over 40% of electricity is generated from coal, while in individual households it is the primary source of heat. This situation puts the already enigmatic plans of shutting down coal mining in Poland into question. Therefore, work aimed at increasing the extraction capacity of existing shafts while maintaining the highest level of operational safety is still valid. This article concerns the issues of the fatigue life of compacted ropes used as hoist ropes in mine shafts. The discussion regarding the use of these ropes among shaft hoist users has been going on for several years. This paper presents the unique results of compacted rope fatigue tests carried out at the Central Mining Institute in Katowice. In the authors’ view, these results and their interpretation should serve to clarify several important aspects that arouse the interest of users.

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Section: Fig 3 Views Of Rope Cross-sections (Top) and Surfaces (Botto...mentioning

confidence: 99%

Fatigue Life of Compacted Wire Ropes for Applications in Deep Mining

Kubiś

Olszyna

Szade

et al. 2023

Management Systems in Production Engineering

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“…In the known literature, the Wöhler curve and the strength function have been defined for applications in steel alloys. An integrated continuum mechanics model with a genetic algorithm was investigated for the multi-axis fatigue response of steel samples [20][21][22][23][24][25][26].…”

Section: Probability Of Occurrence Of Wire Cracks In the Working Rope...mentioning

confidence: 99%

Some Stochastic Aspects of Safety Work of Steel Wire Ropes Used in Mining-Shaft Hoists

Tytko

Olszyna

Kocór³

et al. 2023

Sustainability

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In most rope transport devices, the used steel wire ropes are replaced with new ones after working for a certain period of time, or after reaching the acceptable level of wear. The operational safety of the entire system depends on the correct diagnosis of the condition of the working wire rope. This is not easy, because the working lives of the ropes are varied, and their wear depends on many factors, including random ones. This article presents three different aspects of the work of steel ropes in mining-shaft hoists. What they have in common is a stochastic approach to interpreting the level of rope wear. The process of progressive wear due to fatigue breaking of wires is presented as the first example. This process is non-linear with a strong upward trend, which, in the final stage, turns into a phase often referred to as “explosive”. The rate at which subsequent wire breaks appear is influenced by numerous random factors, e.g., in the form of different methods and materials from which a given rope is constructed. However, the character of the progressing wear process is most affected by the random distribution of stresses experienced by individual wires and the randomly variable nature of the working environment. The second aspect presented in this article is an attempt to determine the probability of wire breaks of the rope. This was presented on the example of wear of the hoisting rope of a mining-shaft hoist. The last aspect of a stochastic nature, which is discussed in the article, is the issue of separating individual components of this distribution from the multimodal distribution describing the tensile strength of the rope wires, possibly of a normal character. Modern methods of analysis allow such distributions to be assigned to specific structural elements of the wire rope. This gives information about which structural elements of the rope wear faster or unusually and, consequently, determine its strength. This was presented on the basis of the results of strength tests of the wires of the mining-shaft hoist rope, which broke due to excessive corrosion wear of the inner strands. The presented examples explain only a short part of randomness in the description of working ropes, but the intention of the authors is to draw the attention of the personnel responsible for their safe operation to unavoidable random factors.

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“…Zhao et al [9] have reported the fatigue-life prediction of wire ropes using the Wöhler curve, while Kamal & Rahman [11] make some modifications to the curve to predict the fatigue-life of steel alloys. Other than that, the fatigue life prediction of steel alloys has also been done by Mahmud et al [12] by utilizing the Weibull statistical distribution approach. These conventional methods used phenomenological approach that is based on the mean load over the net section area of the wire ropes, without taking into consideration the failure of individual wires in the strand under fatigue stressing.…”

Section: Introductionmentioning

confidence: 99%

Residual Properties of the Drawn Steel Wires for Damage-Based Fretting Fatigue Models of the Wire Ropes

Kamarudin

Ahmad

Tamin

2020

MSF

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This paper presents the residual properties and parameters of the damage-based fatigue life prediction models of the steel wire ropes under fretting fatigue conditions. The damage mechanics-based approach is employed to develop the predictive method for the reliability of the steel wire ropes. The elastic modulus is dependent on the fatigue load condition and the accumulated number of the load cycles. The characteristic degradation of the Young’s modulus of drawn steel wires is established through the phenomenological presentation of the interrupted fatigue test data. The samples are given a quasi-static loading followed by a block cyclic loading with various stress amplitudes and ratios. The residual Young’s modulus is calculated after each block of cycles. The effect of the different loading condition with the amplitude and mean stress on the measured fatigue life of a single wire is presented using the life parameter, χ. The residual Young’s modulus data are presented in terms of normalized quantities. Significant reduction in the elastic modulus due to fatigue is exhibited after enduring 70% of the fatigue life of the material. The fitting constants are obtained, and the fitted equation is used to describe the degradation of Young’s modulus at N number of cycles. Subsequently, the data can be applied to predict the fatigue-life of steel wire ropes and assess its reliability through fretting-induced damage models.

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Damaging fatigue cycles determination for random service loadings using mixed Weibull analysis

Cited by 6 publications

References 17 publications

Fatigue Life of Compacted Wire Ropes for Applications in Deep Mining

Fatigue Life of Compacted Wire Ropes for Applications in Deep Mining

Some Stochastic Aspects of Safety Work of Steel Wire Ropes Used in Mining-Shaft Hoists

Residual Properties of the Drawn Steel Wires for Damage-Based Fretting Fatigue Models of the Wire Ropes

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