Stick-slip analysis of a circular point contact between a rigid sphere and a flat unidirectional composite with cylindrical fibers

Leroux, Julien; Nélias, Daniel

doi:10.1016/j.ijsolstr.2011.09.007

Cited by 33 publications

(14 citation statements)

References 32 publications

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“…The competition between FIF and FIW runs through the entire fretting wear process. At the 1200th cycle, the fatigue cracks are observed at the stick-slip region, shown in Figures 7a, 8a and 9a-c, which is due to high shear stress concentration at the stick-slip interface [42]. The wear mechanism is the combination of adhesive wear in the sticking region and abrasive and oxidation wear in the micro-slip zone.…”

Section: Discussionmentioning

confidence: 96%

The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number

et al. 2020

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The evolution of fretting wear behavior and damage mechanism in Alloy 690TT with cycle number was investigated via laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), focus ion beam (FIB), and transmission electron microscopy (TEM). The results showed that the fretting running status underwent a transition from partial slip and mixed stick-slip to final gross slip with the transformation of Ft–D curves from the ellipse to the parallelogram. The coefficient of friction (COF) experienced three drops throughout the fretting process, which indicated the transformation from high-friction wear to low-friction wear. The first drop was due to the transition from two-body to three-body contact. The second and third drops were mainly related to the evolution of the glaze layer from a localized distribution to completely covering the whole contact surface. The competition between fretting induced fatigue cracking (FIF) and fretting induced wear (FIW) ran through the entire fretting wear process. Before the 1.2 × 104th cycle, the fatigue crack growth was faster than wear, and FIF won the competition. As the fretting cycle continued to increase, the wear velocity was obviously faster than that of FIF, which indicated that FIW defeated FIF. The tribologically transformed structure (TTS) participated in the competition between FIF and FIW. The gain boundaries and dislocations in the TTS were a suitable pathway for crack initiation and propagation and oxygen permeation.

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Section: Discussionmentioning

confidence: 96%

The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number

et al. 2020

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“…When the convergence is reached, the final contact force is used to update the velocity of the ball and the next rigid body displacement can be calculated. For more details on SAM as developed to solve inelastic contact problems or contact problem with heterogeneous materials the reader may refer to Boucly et al (2007), Fulleringer and Nelias (2010), Leroux and Nélias (2011) or . The reader may also refer to the recent work of Wang, Keer and coauthors from Northwestern University Chen and Wang, 2008;Zhou et al, 2009), Bosman and Schipper at the University of Twente (Bosman and Schipper, 2011), and Wang et al from Tsinghua Univ.…”

Section: The Semi-analytical Methodsmentioning

confidence: 99%

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Chaise

Nélias

et al. 2012

Journal of Materials Processing Technology

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108

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International audienceDuring a manufacturing process, the ultrasonic shot peening (USP) technique can be used as the final surface treatment. The aim of this operation is to introduce surface compressive residual stresses in order to prevent crack propagation advancement. Although the numerical simulation method is able to predict the level of residual stresses in a peened part, the 3D modelling of the real USP process, in which many successive and shifted impacts take place, is very delicate to perform and costly in terms of computing time and memory space required. In this paper, a two step method based at first on the calculation of the averaged plastic strain tensor in a half-space by using a semi-analytical method and in a second time on the transfer of this plastic strain field to a finite element model is proposed in order to simulate the effects of the USP process in thin structures. The accuracy and advantages of the semi-analytical method are validated by a benchmark with several finite element codes. Experiments, similar to the Almen test, are performed on thin plates of Inconel 600. Numerical results in terms of distortions and residual stresses are compared with the experimental data

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“…Discrete convolution (DC) and 3D FFT have been since then widely used in the contact solvers. Leroux and Nelias [37] worked also on the stick-slip problem for a sphere in contact with a flat half-space containing unidirectional cylindrical fibers. Gallego et al [38] proposed an algorithm based on the conjugate gradient method to account for the coupling between normal and tangential effects, which is required for frictional contact problems between elastically dissimilar materials.…”

Section: Introductionmentioning

confidence: 99%

Contact Analyses for Anisotropic Half Space: Effect of the Anisotropy on the Pressure Distribution and Contact Area

Bagault

Nélias

Baietto

2012

Journal of Tribology

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A contact model using semi-analytical methods, relying on elementary analytical solutions, has been developed. It is based on numerical techniques adapted to contact mechanics, with strong potential for inelastic, inhomogeneous or anisotropic materials. Recent developments aim to quantify displacements and stresses of an anisotropic material contacting both an isotropic or anisotropic material. The influence of symmetry axes on the contact solution will be more specifically analyzed.

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Stick-slip analysis of a circular point contact between a rigid sphere and a flat unidirectional composite with cylindrical fibers

Cited by 33 publications

References 32 publications

The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number

The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Contact Analyses for Anisotropic Half Space: Effect of the Anisotropy on the Pressure Distribution and Contact Area

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