首页|Prediction of fretting fatigue damage under variable loading blocks: Effect of plasticity

Prediction of fretting fatigue damage under variable loading blocks: Effect of plasticity

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  • NETL
  • NSTL
  • Elsevier
This research paper investigates the lifetime span and the crack propagation mechanism for a steel cylinder/ plane contact under severe variable plastic fretting fatigue conditions that are representative of high pressure dynamic flexible pipe risers. An FEA model was used to predict the total life of the contact by separating the crack nucleation and the crack propagation mechanisms. Good correlation between numerical predictions and experimental results was obtained. Since fretting is well known for generating important stress gradients, a nonlocal critical distance method is applied to estimate the number of cycles required for crack nucleation. The crack propagation was addressed using Kujawski's fatigue crack driving parameter with Paris law. The variable loading conditions were investigated considering decreasing tangential force and fatigue stress loading blocks and comparing various elastic and elastic-plastic material responses. Since significant plastic deformations are generated during the initial loading blocks (the highly charged block), better predictions of crack extension or fretting fatigue endurance are achieved using elastoplastic hypotheses (monotonic or cyclic hardening). By contrast, elastic assumption which is less accurate provides systematic conservative predictions.

Fretting fatigueBlock loadingFEMPlasticityFlexible pipesCylinder plane contact

Mohammed Fartas、Siegfried Fouvry、Pierre Arnaud、Simon Garcin、Fernando Pires

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Ecole Centrole de Lyon, LTDS Laboratory, 36 av Guy de Collongue, 69130 Ecully, France

Ecole Centrole de Lyon, LTDS Laboratory, 36 av Guy de Collongue, 69130 Ecully, France||MINES ParisTech, Centre des Materiaux, 63-65 rue Henri-Auguste Desbrueres, F-91003 Evry Cedex, France

MINES ParisTech, Centre des Materiaux, 63-65 rue Henri-Auguste Desbrueres, F-91003 Evry Cedex, France

TechnipFMC, Brazil

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2025

10.1016/j.ijfatigue.2025.109022

International journal of fatigue

International journal of fatigue

SCI
ISSN：0142-1123
年,卷(期)：2025.199(Oct.)
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