Incremental fatigue damage simulation for reliability assessment of steel wire ropes under fretting fatigue conditions

Ahmad, Sajjad; Badshah, Saeed; Abdulhamid, Mohd F.; Kang, Hooi-Siang; Kader, Abdul; Tamin, Mohd Nasir

doi:10.1201/9781351174664-275

Cited by 3 publications

(10 citation statements)

References 1 publication

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“…Results having friction coefficient values of 0.1 and 0.2 are almost the same with no significant differences. It is important to note that none of the values of von Mises stress exceed the values of yield stress [15] of the drawn steel wire. It means that loading below 50% MBL will cause no plasticity in the localized region.…”

Section: Resultsmentioning

confidence: 99%

“…Considering the High Cycle Fatigue in which metals fails like quasi-brittle material, a ductile may undergo brittle failure if the material is subjected to low level of stresses causing elastic behavior at the meso-level. At the micro level, plasticity may occur [15,16] and will initiate damage in the subsequent cycle. In the absence of friction, neighboring wires tend to slip with each other which will be discussed in the following section.…”

Section: Resultsmentioning

confidence: 99%

“…All the wires of 1 × 7 strands were considered as isotropic and were homogenously made of drawn steel. The chemical composition of the drawn wires was (in wt.%) 0.83C, 0.91Si, 0.717Mn, 0.0124P, 0.0031S, 0.015Cu, the remaining being Fe [15]. The modulus of elasticity was 202 GPa and Poisson’s ratio is 0.28 [15,21].…”

Section: Methodsmentioning

confidence: 99%

“…The chemical composition of the drawn wires was (in wt.%) 0.83C, 0.91Si, 0.717Mn, 0.0124P, 0.0031S, 0.015Cu, the remaining being Fe [15]. The modulus of elasticity was 202 GPa and Poisson’s ratio is 0.28 [15,21]. In addition to the elastic information, stress–strain information after yielding was also provided [21] and the wire strand was subjected to loading below 50% MBL but as the stresses were more in the trellis point of contact region [5,6], plasticity could not be ignored.…”

Section: Methodsmentioning

confidence: 99%

“…The data of fatigue life are based on available standard DNV OS-E301 (2004) and published literature by researchers [13,14]. A continuum damage mechanics approach was proposed recently by [15] for estimating fatigue life of wire rope. This approach is based on the Lemaitre model [16] for high cycle fatigue.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of 1 × 7 Steel Wire Strand under Fretting Fatigue Condition

et al. 2019

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Wire ropes undergo a fretting fatigue condition when subjected to axial and bending loads. The fretting behavior of wires are classified as line contact and trellis point of contact. The experimental study on the fatigue of wire ropes indicates that most of the failure occurs due to high localized stresses at trellis point of contact. A continuum damage mechanics approach was previously proposed to estimate the fatigue life estimation of wire ropes. The approach majorly depends on the high value of localized stresses as well as the micro-slippage occurs at the contact region. Finite element approach has been used to study radial and axial distribution of stresses and displacement in order to clearly understand the evolution of stresses and existence of relative displacements between neighboring wires under various loading and frictional conditions. The relative movements of contacting wires are more when friction is not considered. In the presence of friction, the relative movement occurs at the boundaries of the contact region. The location of microslip in the presence of friction is backed by the experimental observation stating the crack is initiated at or the outer boundary of the contact spot. The existence of slip is due to different displacement of outer and central wires.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of 1 × 7 Steel Wire Strand under Fretting Fatigue Condition

et al. 2019

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Cumulative fretting fatigue damage model for steel wire ropes

Ahmad,

Badshah,

Rahimian Koloor

et al. 2024

Fatigue Fract Eng Mat Struct

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Fretting fatigue contributes significantly to the fatigue failure process in steel wire ropes at the wire‐to‐wire trellis contact region with partial slip conditions. In this respect, this work demonstrates a new damage‐based fretting fatigue model for the prediction of such a failure process. The model is based on Lemaitre's damage equations for quasi‐brittle material with a damageable micro‐inclusion embedded in an elastic meso‐element. It incorporates the cyclic degradation of the elastic modulus of the drawn steel wire material. The fatigue life model acknowledges the mean stress effect. The constitutive and damage equations are formulated into user material (UMAT) subroutine for integration with Abaqus finite element analysis code. The localized fretting fatigue damage mechanism is simulated with an isolated two‐wire model. The effect of the contact condition with the coefficient of friction of 0.2 and 0.8 on the contact mechanics of the drawn wires is considered. The fretting fatigue mechanism map is established for each simulation case. The simulated results of N0 (no of cycles to initiate damage) and damage variable, D, confirm the fretting fatigue condition as the damage occurs in the slip region of the contact area for both the frictional conditions. The results were found in agreement with the previously establish Ruiz fretting parameter. This study will provide a base for the onward reliability assessment of steel wire ropes.

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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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Incremental fatigue damage simulation for reliability assessment of steel wire ropes under fretting fatigue conditions

Cited by 3 publications

References 1 publication

Numerical Investigation of 1 × 7 Steel Wire Strand under Fretting Fatigue Condition

Numerical Investigation of 1 × 7 Steel Wire Strand under Fretting Fatigue Condition

Cumulative fretting fatigue damage model for steel wire ropes

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

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