On high-cycle fatigue of 316L stents

Barrera, Olga; Makradi, A.; Abbadi, M.; Azaouzi, M.; Belouettar, Salim

doi:10.1080/10255842.2012.677442

Cited by 13 publications

(16 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A key conclusion of this work was the need for microstructural modelling in stent fatigue assessment. Barrera et al [8] adopted the Dang Van criterion for prediction of fatigue performance of a 316L SS stent, using shear and hydrostatic stresses evaluated at the mesoscopic level. The authors have previously applied a crystal plasticity (CP) approach (i.e.…”

Section: Introductionmentioning

confidence: 99%

Micro-scale testing and micromechanical modelling for high cycle fatigue of CoCr stent material

Sweeney

O’Brien

Dunne

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

This paper presents a framework of experimental testing and crystal plasticity micromechanics for high cycle fatigue (HCF) of micro-scale L605 CoCr stent material.Micro-scale specimens, representative of stent struts, are manufactured via laser micromachining and electro-polishing from biomedical grade CoCr alloy foil. Crystal plasticity models of the micro-specimens are developed using a length scale-dependent, strain-gradient constitutive model and a phenomenological (power-law) constitutive model, calibrated from monotonic and cyclic plasticity test data. Experimental microstructural characterization of the grain morphology and precipitate distributions is used as input for the polycrystalline finite element (FE) morphologies. Two microstructure-sensitive fatigue indicator parameters are applied, using local and non-local (grain-averaged) implementations, for the phenomenological and length scale-dependent models, respectively, to predict fatigue crack initiation (FCI) in the HCF experiments.

show abstract

Section: Introductionmentioning

confidence: 99%

Micro-scale testing and micromechanical modelling for high cycle fatigue of CoCr stent material

Sweeney

O’Brien

Dunne

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

show abstract

“…The Dang Van fatigue criterion has already been introduced in the previous chapter (see From an implementation point of view, the main challenge is to obtain .It can be calculated through computational geometry [101] although most of the applications in the literature use optimization methods (for example [80], [102]- [104]) or in textbooks [105], and obtain as:…”

Section: Dang Van Fatigue Criterionmentioning

confidence: 99%

Multiaxial Fatigue Analysis of Mooring Chain Links Under Tension Loading: Influence of Mean Load and Simplified Assessment

Perez

Bastid

Constantinescu

et al. 2018

Volume 3: Structures, Safety, and Reliability

View full text Add to dashboard Cite

Current standards (as an example, DNV-OS-E301[1] and API-RP-2SK[2]) do not account for mean load in the fatigue assessment of mooring chains. Both standards, provide S-N curves derived from experimental work without specifying the mean load for which they have been obtained or proposing a mean load correction function. This paper reports a fatigue analysis study of mooring chains under Tension Loading using a multiaxial fatigue criterion for two different mean loads. Multiaxial fatigue criteria enable to account directly for complex phenomena, such as residual stresses, non-proportionality of the stress tensor, among others. This paper presents an example of the implementation of the Dang Van fatigue criterion for studying the fatigue behavior of mooring chains under tension. It quantifies the effect of the mean load on the fatigue lifetime and the failure location. Furthermore, it also proposes a simplified approach to reduce the complexity and the computational time of the fatigue analysis using Dang Van fatigue criterion. The paper is organized as follows: in the first part an example of the fatigue assessment is reported. Two different loading conditions with the same load amplitude but different mean loads are studied. The assessment method is based on two steps: a mechanical analysis and a fatigue analysis. In the second part, a simplified fatigue assessment method is proposed. As part of this method, a ratio between the fatigue lifetimes of two loading conditions, which have the same load amplitude but different mean load, is formulated. This ratio has been obtained analytically using the geometric representation of the Dang Van fatigue Criterion. Finally, the paper ends with a discussion, based on recent works, regarding the formulation of the locus of the Dang Van criterion and the fatigue properties used for the calibration of this criterion.

show abstract

“…Numerical procedures, combined with experimental investigations, allow to make lifesaving decisions and to possibly improve both the clinical procedure and stent design. Several studies exploring, investigating and inquiring the numerical fatigue-life assessment of balloonexpandable stents have been reported in the literature [10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the proposed fatigue prediction methodologies generally neglect the inhomogeneous nature of the microstructure [11,[13][14][15][16]21] and although they may provide a practical and relevant answer to the fatigue design of stents, they cannot predict the scatter of the fatigue strength which might be induced by this heterogeneity [18]. Indeed, in high-cycle fatigue, the crack initiation is intimately related to localization of the plastic slip which strongly depends on the crystallographic orientations of the grains.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modeling for the probabilistic failure prediction of stents in high-cycle fatigue

Guerchais

Scalet

Constantinescu

et al. 2016

International Journal of Fatigue

View full text Add to dashboard Cite

International audienceThe present paper introduces a methodology for the high-cycle fatigue design of balloon-expandable stents. The proposed approach is based on a micromechanical model coupled with a probabilistic methodology for the failure prediction of stents. This allows to account for material heterogeneity and scatter, to introduce a fatigue criterion able to consider stress gradients, and to perform a probabilistic analysis to obtain general predictions from a limited number of realizations of microstructures investigated. Numerical simulations have allowed to highlight the noteworthy characteristics of the mechanical response in the stent as well as the heterogeneity of the mechanical fields due to stress concentrations in the unit cell geometry and to strain incompatibilities between the grains induced by the anisotropy of their mechanical behavior. The predicted survival probability of the stent is in accordance with the experimental data from the literature. Moreover, the influence of the amplitude of the arterial pressure on the fatigue strength of the stent has been evaluated

show abstract

On high-cycle fatigue of 316L stents

Cited by 13 publications

References 24 publications

Micro-scale testing and micromechanical modelling for high cycle fatigue of CoCr stent material

Micro-scale testing and micromechanical modelling for high cycle fatigue of CoCr stent material

Multiaxial Fatigue Analysis of Mooring Chain Links Under Tension Loading: Influence of Mean Load and Simplified Assessment

Micromechanical modeling for the probabilistic failure prediction of stents in high-cycle fatigue

Contact Info

Product

Resources

About