| People | Locations | Statistics |
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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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André, Stéphane
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Deformation mechanisms in PBT at elevated temperaturescitations
- 2022Deformation in Semi-Crystalline Polymers from a Heterogeneous Spherulitic Microstructure
- 2022Development of plasticity in vitrimers synthesized from a semi‐crystalline polymer using injection moldingcitations
- 2021An FFT solver used for virtual Dynamic Mechanical Analysis experiments: Application to a glassy/amorphous system and to a particulate compositecitations
- 2021Solid rheological properties of PBT-based vitrimerscitations
- 2021Certifying the intrinsic character of a constitutive law for semicrystalline polymers: a probation test
- 2021Certifying the intrinsic character of a constitutive law for semicrystalline polymers: a probation test ; Certifier du caractère intrinsèque d'une loi constitutive pour les polymères semi-cristallins : un test de probation
- 2020An FFT-solver used for virtual Dynamic Mechanical Analysis experiments: Application on a glassy/amorphous system and on a particulate composite
- 2019CONJOINT EFFECTS OF CHEMICAL AND MECHANICAL DEGRADATION STRESSORS ON FUEL CELL PFSA MEMBRANES
- 2018Viscoelastic behaviour of heterogeneous materials: extension of CraFT software to harmonic regime
- 2018Viscoelastic behaviour of heterogeneous materials studied thanks to an extension of CraFT software in harmonic regime
- 2017Mesoscopic strain field analysis in a woven composite using a spectral solver and 3D-DIC measurementscitations
- 2017In-situ continuous 1D/2D synchrotron SAXS scans to study the kinematics of plastic instability in SCP
- 2017Anisotropy development during HDPE necking studied at the microscale with in situ continuous 1D SAXS scanscitations
- 2016A Mechanical Study of a Glass Fabric-Thermoplastic Resin Composite: 3D-DIC and X-ray tomographic observations explained by numerical simulations based on a spectral solver
- 2016Advantages of a 3-parameter reduced constitutive model for the measurement of polymers elastic modulus using tensile testscitations
- 2015Kinematic study of necking in a semi-crystalline polymer through 3D Digital Image Correlationcitations
- 2015Influence of the fiber/matrix strength on the mechanical properties of a glass fiber/thermoplastic-matrix plain weave fabric compositecitations
- 2013A Common Multiscale Feature of the Deformation Mechanisms of a Semicrystalline Polymercitations
- 2011From the thermodynamics of constitutive laws to the thermomechanical experimental characterization of a semicrystalline polymer from IR imagingcitations
- 2010Investigation of the Mesostructure of a Mechanically Deformed HDPE by Synchrotron Microtomographycitations
- 2008Optical techniques for in situ dynamical investigation of plastic damagecitations
Places of action
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article
Kinematic study of necking in a semi-crystalline polymer through 3D Digital Image Correlation
Abstract
This study is devoted to the necking phenomenon and to the kinematic aspects associated with this plastic instability. The material studied is a High Density PolyEthylene deformed in tension. Full-field 3D-DIC (Digital Image Correlation) strain measurements were carried out on one face of a tensile specimen. On the opposite face, the longitudinal strain was measured in the central section using video-traction®, an extensometer based on marker tracking. This last measurement was used with feedback to control the strain rate in the specimen center. Specific data processing was run on the 3D-DIC measurements to obtain strain and strain rate maps up to true strain levels greater than 1.8. Even with measurements made on a relatively small strain rate range (smaller than 1 decade), we highlighted how much the necking phenomenon depends on the strain rate. In particular, we found that, around the yield point, the strain localization is more pronounced with higher strain rates. By analyzing the evolution of the strain rates in the necking shoulder regions, we carried out direct and original measurements of the strain level corresponding to the onset of necking stabilization (Natural Draw Ratio). This was possible because our original experimental protocol enabled us to obtain such strain maps even when the true strain values were significantly greater than 1. From an experimental point of view, we found that a video-extensometer based on marker tracking cannot efficiently measure the strain rate in the specimen center at large strain levels when the markers are greatly very deformed. In addition, a wide range of new experimental results (2D and 1D strain-rate and velocity data) is presented in this paper and we consider that this data should be particularly useful for the validation of numerical simulations of necking in polymers.