Plasticity in fretting contact

Ambrico, Joseph M.

doi:10.1016/s0022-5096(99)00103-9

Cited by 78 publications

(40 citation statements)

References 28 publications

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“…In the literature on metallic materials, fatigue domains are classified according to the characterisitics of the stabilized cycle [35][36][37][38]. In the case of dominant ratcheting [34,35], the fatigue life is usually very short, and we consider that a methodology like continuum damage mechanics is more relevant. The cases of dissipative stabilized cycle at the macroscopic scale -a phenomenon known as plastic shakedown -represent the low cycle fatigue (LCF) domain.…”

Section: Objectivementioning

confidence: 99%

Multiaxial fatigue models for short glass fibre reinforced polyamide. Part II: Fatigue life estimation

Launay

Maitournam

Marco

et al. 2013

International Journal of Fatigue

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WOSInternational audienceComponents made of short fibre reinforced thermoplastics are increasingly used in the automotive industry, and more frequently subjected to fatigue loadings during their service life. The determination of a predictive fatigue criterion is therefore a serious issue for the designers, and requires the knowledge of the local mechanical response. As the cyclic behaviour of polymeric material is reckoned to be highly nonlinear, even at room temperature, an accurate constitutive model is a preliminary step for confident fatigue design. Constitutive equations for the cyclic behaviour, developed and validated by the authors in Part I of this paper [Launay et al., Int J Fatigue, in press], are applied to the mechanical analysis of fatigue campaigns carried out by Klimkeit et al. and De Monte et al. on specimens made out of polyamide 66 reinforced with 35 wt.% of short glass fibres. Both studies are performed at room temperature, with material conditioned at the equilibrium with air containing 50% of relative humidity (RH50) or dry-as-moulded (DAM). Post-processing the cyclic response in steady-state allows the comparison of several fatigue criteria. The fatigue databases involve various loadings, including the study of multiaxiality and mean-stress effects on different microstructures. Among all physical quantities, the dissipated energy density per cycle ΔWdiss displays the best correlation with the fatigue life

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Section: Objectivementioning

confidence: 99%

Multiaxial fatigue models for short glass fibre reinforced polyamide. Part II: Fatigue life estimation

Launay

Maitournam

Marco

et al. 2013

International Journal of Fatigue

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“…In the context of fretting processes, the motion or evolution of a system is easily interpreted by deter mining the relative displacement of two surfaces under the effect of a cyclic tangential load. For low ampli tude fretting, the mode of the relative motion of the surfaces is fairly complex, which is explained by the influence of surface asperities comparable with the amplitudes of microdisplacements, the fits of adhe sion activity [15], self organization mechanisms, the structural dynamics of partial slip [16], microwear [17], plasticity [18], and acts of microslip [19].…”

Section: Foundations Of Physical Modelingmentioning

confidence: 99%

Processes of dynamics of surface layers during low-amplitude fretting

Shalapko

Tarasova

2013

J. Frict. Wear

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Abstract-A model of dynamic effect during low amplitude oscillations of surfaces comparable with the pre liminary displacement and the first acts of sleep under the oscillating tangential loading of the contact is developed. Solving a system of differential force balance equations has yielded the main characteristics of the process of the dynamics of a nominally stationary contact depending on the governing parameters of the sys tem. Regularities of the friction characteristic at low sliding velocity are determined with allowance for the preliminary displacement phenomenon, the Stribeck effect, as well as the parameter of the plasticity and vis cosity of friction. The model allows one tracing the evolution of relative displacements and slip velocities, cal culating phase diagrams, as well as deriving the friction characteristic and real slip amplitudes typical of the mixed friction mode and low amplitude fretting.

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“…The range of the cyclic plastic shear strain on any plane is calculated over the complete third (stabilized) cycle of the simulation at each integration point, generalizing the methodology of Ambrico and Begley (2000) and Goh (2002). First the ratcheting component of plastic shear strain on a given θ -plane is computed over the third cycle as (see Figure 9b)…”

Section: Fatigue Crack Formation: Distribution and Percolation Of Cycmentioning

confidence: 99%

Effects of Microstructure Variability on Intrinsic Fatigue Resistance of Nickel-base Superalloys – A Computational Micromechanics Approach

2006

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Understanding the effects of microstructure variability on fatigue resistance is a key to selection and design of materials for fatigue applications. The traditional empirical approach rooted in experiments is being increasingly combined with systematic computational modeling. This work is concerned with demonstrating the feasibility of linking effects of microstructure variability on cyclic plasticity at the scale of intrinsic microstructure of a single crystal nickel-base superalloy. The precipitate and the matrix phases of the alloy are modeled explicitly using a physically based crystal viscoplasticity constitutive framework with appropriate scale and spacing effects to reflect dislocationprecipitate interactions. The model is implemented as a user material subroutine within a finite element code. Various realizations of different microstructures are generated using a constrained Poisson point process. Statistical volume elements (SVEs) with random-periodic boundary conditions are simulated under fully reversed cyclic loading at 650 • C. Primary cooling γ precipitate size and volume fraction are considered in terms of their effects on the macroscopic stress-strain response and on distributed cyclic microplasticity within the SVE. To compare various microstructures in terms of probability of fatigue crack formation, an appropriate nonlocal measure of cyclic plastic shear strain range is proposed based on percolation of cyclic microplasticity at the scale of the SVE.

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Plasticity in fretting contact

Cited by 78 publications

References 28 publications

Multiaxial fatigue models for short glass fibre reinforced polyamide. Part II: Fatigue life estimation

Multiaxial fatigue models for short glass fibre reinforced polyamide. Part II: Fatigue life estimation

Processes of dynamics of surface layers during low-amplitude fretting

Effects of Microstructure Variability on Intrinsic Fatigue Resistance of Nickel-base Superalloys – A Computational Micromechanics Approach

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