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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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Ye, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Organic A-Site Cations Improve the Resilience of Inorganic Lead-Halide Perovskite Nanocrystals to Surface Defect Formation
- 2023Experimental study of DED-arc additively manufactured steel double-lap shear bolted connectionscitations
- 2022Experimental investigation of wire arc additively manufactured steel single-lap shear bolted connections
- 2019Development of optimum cold-formed steel beams for serviceability and ultimate limit states using Big Bang-Big Crunch optimisation
- 2018Local-flexural interactive buckling of standard and optimised cold-formed steel columnscitations
- 2016Optimum design of cold-formed steel beams using Particle Swarm Optimisation methodcitations
- 2015Kinematic study of necking in a semi-crystalline polymer through 3D Digital Image Correlationcitations
- 2015Development of More Efficient Cold-Formed Steel Channel Sections in Bendingcitations
- 2010Cubic boron nitride based metastable coatings and nanocompositescitations
- 2010Magnetron sputter deposition of low-stress, carbon-containing cubic boron nitride films using Ar-N₂-CH₄ gas mixturescitations
- 2009Molecular dynamics simulations of the sputter deposition process of silicon carbide on silicon and comparison with experiments
- 2009Cubic boron nitride based metastable coatings and nanocomposites
- 2009Wetting behaviour and protein adsorption tests on ultrananocrystalline diamond and amorphous hydrogenated carbon thin films
- 2009Magnetron sputter deposition of low-stress cubic boron nitride films using Ar-N₂CH₄ gas mixtures
- 2009Coatings of c-BN, c-BN-based metastable materials and c-BNbased nanocomposites
- 2008Quantum computing with alkaline-earth-metal atomscitations
- 2006Stress reduction in nanocomposite coatings consisting of hexagonal and cubic boron nitridecitations
- 2005Stress reduction in nanocomposite coatings of hexagonal and cubic boron nitride
- 2003Influence of low energy ion implantation on mechanical properties of magnetron sputtered metastable (Cr,Al)N thin filmscitations
- 2002Influence of the energy of sputtered carbon atoms on the constitution of diamond-like carbon thin filmscitations
- 2002Correlation between plasma particle fluxes, microstructure and properties of titanium diboride thin filmscitations
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.