Axial fatigue design of sheathed spiral strands in deep water applications

Raoof, Mohammed; Davies, Timothy J.

doi:10.1016/j.ijfatigue.2008.05.002

Cited by 12 publications

(12 citation statements)

References 13 publications

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“…In [39], [40] and several other papers by the same author, the fatigue strength curves presented are calculated on the basis of complex theoretical, but experimentally validated, models. By defining failure as fracture of the first wire, the failure criterion applied is quite strict:…”

Section: Slope and Knee Point Of Fatigue Strength Curvementioning

confidence: 99%

“…Consequently, the slope also depends on the definition of failure. A comparatively strict failure criteria -fracture of the first (see [39] or [40]) or fifth (see [37]) wire, 92 % residual breaking force after passing through 2 ⋅10 6 load cycles -results in small values k 1 ≈ 3 or even lower, whereas the definition that failure has occurred when the load can no longer be applied results in values k 1 ≈ 4 to 5.…”

Section: Specific Rules For Parallel Wire or Strand Systems (Group C)mentioning

confidence: 99%

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Revision of EN 1993‐1‐11 – fatigue design rules for tension components

Annan¹,

Bechtold

Friedrich

et al. 2019

Steel Construction

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Section: Slope and Knee Point Of Fatigue Strength Curvementioning

confidence: 99%

Section: Specific Rules For Parallel Wire or Strand Systems (Group C)mentioning

confidence: 99%

Revision of EN 1993‐1‐11 – fatigue design rules for tension components

Annan¹,

Bechtold

Friedrich

et al. 2019

Steel Construction

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“…In addition, wire ropes are associated with the high cost of installation and are very costly and difficult to replace [1]. These wire ropes are subjected to complex loading systems, including combinations of tension, torsion and bending along with that induced by the self-weight of the component in question.…”

Section: Introductionmentioning

confidence: 99%

“…In the latter, the fatigue design of wire ropes considers both the high-cycle fatigue of the stranded wires and the inherent fretting effects [9][10][11][12]. The much-needed fatigue-life data (S-N curves) for the wire ropes are based on data taken from available standards such as DNV OS-E301 (DNV, 2004) and the available literature [1,[13][14][15][16]. However, the reported fatigue strength of these wire ropes is relatively low at (Slim / SU) = 0.15-0.3 [17].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, most of the available fatigue-life data for the wire ropes are generated from tests at zerodepth (in-air environment). In this respect, extensive axial fatigue-life test data on sheathed steel spiral strands have been established [1]. The work also quantifies the effects of external hydrostatic pressure, representing the deep-water loading condition, on the fatigue performance of the sheathed wire ropes.…”

Section: Introductionmentioning

confidence: 99%

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Methodology for reliability assessment of steel wire ropes under fretting fatigue conditions

Salleh¹,

Abdullah

Abdulhamid³

et al. 2017

J. MECH. ENG. SCI.

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This paper describes a newly-developed damage-based fatigue life model for the longterm reliability assessment of drawn steel wires and wire ropes. The methodology is based on the computed local stress field in the critical trellis contact zone of a stranded wire rope by FE simulations and the estimated fretting damage of the drawn wire material. A case study using a single strand (1x7) steel wire rope with 5.43 mm-dia. drawn wires is employed to demonstrate the damage-based fatigue life prediction procedures. Under applied tensile loading with peak stress corresponding to 50%MBL (P = 145 kN, R = 0.1), the von Mises stress cycles in-phase and with an identical stress ratio to the applied axial load. The damage initiation life at the trellis contact along the core wire is No = 673 cycles with an additional 589 load cycles to reach the first separation of the material point. The threshold load cycle for the fretting fatigue damage is predicted to be 12.3%MBL. An improved data set of the damage model parameters of the drawn steel wires is indispensable in achieving an accurate and validated life prediction model.

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Fatigue resistance of steel ropes: failure criterion: Background to the verification in prEN 1993‐1‐11:2020

Maljaars

Misiek

2021

Steel Construction

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Many steel rope systems are subjected to fluctuating tensile loads and therefore can fail due to fatigue. Available fatigue test data indicate that rope diameter, mean stress, socket type, lay angle and rope length influence the fatigue resistance. Most of the tests were terminated before full failure of the ropes. This paper shows that the test termination criterion, such as fracture of the first wire, fracture of 5 % of the wires or full rope fracture, has a large influence on the resulting fatigue resistance. A probabilistic analysis is carried out for a rope system in a bridge, demonstrating that the required structural reliability levels are met when considering full failure as the end‐of‐life criterion for ropes.

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Axial fatigue design of sheathed spiral strands in deep water applications

Cited by 12 publications

References 13 publications

Revision of EN 1993‐1‐11 – fatigue design rules for tension components

Revision of EN 1993‐1‐11 – fatigue design rules for tension components

Methodology for reliability assessment of steel wire ropes under fretting fatigue conditions

Fatigue resistance of steel ropes: failure criterion: Background to the verification in prEN 1993‐1‐11:2020

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