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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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article
Energy Dissipation and Self-Heating due to Microplastic Deformation Mechanisms at Very High Cycle Fatigue for Single-Phase Ductile Metals
Abstract
This paper aims at a deeper understanding of mechanisms leading to crack initiation in ductile metals in Very High Cycle Fatigue (VHCF). The VHCF regime is associated with stress amplitudes lower than the conventional fatigue limit and numbers of cycles higher than 10 9. Tests were conducted using an ultrasonic technique at loading frequency of 20 kHz. The mechanisms leading to crack initiation express via slip bands at the specimen surface and self-heating due to intrinsic dissipation. Thermal maps were used to estimate the mean dissipation and its change with number of cycles and stress amplitudes in case of pure copper polycrystals. At the same time, the surface relief changes due to plasticity were characterized using optical and scanning electronic microscopes. A good correlation was found between slip band initiation and dissipation. Dissipation and slip band amount always increased over the number of cycles. At very small stress amplitudes, no slip band appeared up to 10 8 cycles but the material was found to dissipate energy. Results derived from tests performed at high loading frequency on pure cupper specimens showed a drift of dissipative regimes incompatible with concepts of fatigue limit and/or asymptotic cyclic stability. These results reveal that the material never reached a steady state. Therefore it could break at higher number of cycles.