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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chrysochoos, André
Institut de Mathématiques de Marseille
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2023Thermal and energy analysis of DMTA testscitations
- 2019Effect of thermomechanical couplings on viscoelastic behaviour of polystyrene
- 2018Viscous dissipation and thermo-mechanical coupling effect in the polymer
- 2018Effect of time and thermo-mechanical couplings on polymers
- 2015Thermomechanical behavior of PA6.6 composites subjected to low cycle fatiguecitations
- 2015Dissipation Assessments During Dynamic Very High Cycle Fatigue Testscitations
- 2014Influence of relative humidity and loading frequency on the PA6.6 cyclic thermomechanical behavior: Part I. mechanical and thermal aspectscitations
- 2014Energy Dissipation and Self-Heating due to Microplastic Deformation Mechanisms at Very High Cycle Fatigue for Single-Phase Ductile Metals
- 2013Energy analysis of the thermomechanical behavior of reinforced polyamides
- 2013Very high cycle fatigue for single phase ductile materials: microplasticity and energy dissipation
- 2013Very High Cycle Fatigue for single phase ductile materials: slip band appearance criterioncitations
- 2013Dissipative and microstructural effects associated with fatigue crack initiation on an Armco ironcitations
- 2012Study of Fatigue Crack Initiation Mechanism on an Armco Iron by Dissipation Assessments and Microstructural Observations
- 2011Microplasticity and energy dissipation in very high cycle fatigue
- 2011Microplasticity and energy dissipation in very high cycle fatigue
- 2011Influence of Dissipated Energy on Shear Band Spacing in HY100 Steelcitations
- 2011Microplasticity evolution in polycrystalline pure copper subjected to very high cycle fatigue
- 2011Microplasticity in polycrystalline pure copper subjected to very high cycle fatigue: thermal and microstructural analyses
- 2010Energy analysis of phase change localization in monocrystalline shape memory alloy
- 2009Local energy analysis of HCF fatigue using DIC & IRT
- 2008Energy Balance of a Semicrystalline Polymer During Local Plastic Deformationcitations
- 2008Infrared image processing for the calorimetric analysis of fatigue phenomenacitations
- 2007Thermographic analysis of fatigue dissipation properties of steel sheets
- 2007Analysis of heat sources accompanying the fatigue of 2024 T3 aluminium alloyscitations
- 2007Influence of dissipated energy on shear band spacing in HY100 steel
- 2006On the shear band spacing in stainless steel 304Lcitations
- 2006On the shear band spacing in stainless steelcitations
- 2005Thermomechanical couplings and localization phenomena in polymers and shape memory alloys
- 2002Multiscale thermomechanical approaches to SMA behaviour
- 2001Influence of the thermomechanical coupling on the propagation of a phase change frontcitations
- 2001Thermal and dissipative effects accompanying Lüders band propagationcitations
- 2001Analysis of strain localization during tensile tests by digital image correlationcitations
Places of action
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conferencepaper
Microplasticity in polycrystalline pure copper subjected to very high cycle fatigue: thermal and microstructural analyses
Abstract
When ductile single-phase metallic materials are subjected to stress magnitudes lower than the conventional fatigue limit, the number of cycles to failure is higher than 109, the so-called very high cycle fatigue (VHCF) regime. This works aims at studying the mechanism leading to crack initiation. The main challenge of this work results from the fact that the manifestations of the mechanisms of interest give rise to very low and localized signal owing to the very low stress magnitudes involved. To rapidly reach the VHCF regime, the ultrasonic fatigue technique has been used with the hourglass shaped plate specimen in commercial CuOF 99.95% copper. Using infrared thermography techniques, the temperature field at the specimen surface was measured during the fatigue test up to 108 cycles. Then, the dissipation in the variable section part of the specimen was calculated using a diffusion model. Moreover, the other surface was observed using a Scanning Electron Microscope (SEM) after interrupted tests at 106, 107 and 108 cycles, respectively. At stress lower than 35 MPa, we did not observe any change of the specimen surface despite a significant self-heating induced by dissipation, whatever the number of cycles. For stress higher than 35 MPa, localized slip band appeared on the specimen surface and high dissipation zones were detected. The dissipation was found to increase higher and faster with increasing applied stress. The amount of slip bands observed on the specimen surface followed the same trend. In addition, two types of slip bands were observed: straight, concentrated, intensive slip bands and fine, spreading slip bands. These results suggested different plasticity behaviors of material which were correlated to the work of Stanzl-Tschegg and Schönbauer [9] who determined VHCF Persistent Slip Bands threshold at 45 MPa.