| 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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Gaillard, Yves
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Multiscale Elastic Modulus Characterization of Ti0.5Fe0.45Mn0.05, an Iron–Titanium–Manganese Alloy Dedicated to Hydrogen Storage
- 2024Fracture toughness determination methods of WC-Co cemented carbide material at micro-scale from micro-bending method using nanoindentation
- 2024Experimental and numerical investigation of porous heat exchangers with Kelvin cell structured foam at high temperatures: Coupled conduction-convection and radiation heat transfercitations
- 2022In situ damping identification of plant fiber composites using dynamic grid nanoindentationcitations
- 2022Simultaneous extraction of the elastic-plastic properties of a thin film and its substrate from an identifiability-based design of depth-sensing nanoindentation testing
- 2022Viscoelastic properties of plant fibers - Dynamic analysis and nanoindentation tests
- 2021Grid nano-indentation as full-field measurements
- 2021Extraction of microstructural parameters from sculptured thin films nanoindentation
- 2021Damping behavior of hemp and flax fibre reinforced greenpoxy composites
- 2020RELATION BETWEEN HARDNESS OF (Ti, Al)N BASED MULTILAYERED COATINGS AND PERIODS OF THEIR STACKINGcitations
- 2020Identifiability of single crystal plasticity parameters from residual topographies in Berkovich nanoindentation on FCC nickelcitations
- 2020RELATION BETWEEN HARDNESS OF MULTILAYERED (Ti, Al)N BASED COATINGS AND PERIODS OF THEIR STACKING
- 2020High-Entropy FeCoNiB0.5Si0.5 Alloy Synthesized by Mechanical Alloying and Spark Plasma Sinteringcitations
- 2020High-Entropy FeCoNiB0.5Si0.5 Alloy Synthesized by Mechanical Alloying and Spark Plasma Sinteringcitations
- 2020High-Entropy FeCoNiB0.5Si0.5 Alloy Synthesized by Mechanical Alloying and Spark Plasma Sinteringcitations
- 2020On the uniqueness of intrinsic viscoelastic properties of materials extracted from nanoindentation using FEMUcitations
- 2020In situ synchrotron ultrasonic fatigue testing device for 3D characterisation of internal crack initiation and growthcitations
- 2019Relation between hardness of multilayered (Ti,Al)N based coatings and periods of their stacking
- 2018Single crystal plasticity parameters identification from residual imprint topography after nano-indentation
- 2017Effect of a hyper deformation drawing process on mechanical behaviour of thin wires of Ti-26Nb (at.%) alloyscitations
- 2016Sensitivity of the residual topography to single crystal plasticity parameters in Berkovich nanoindentation on FCC nickel
- 2014Anisotropy and crystal plasticity analysis of a FCC nickel polycrystal by nanoindentation and numerical modeling
- 2012Superplastic behavior of rosin/beeswax blends at room temperaturecitations
- 2006Instrumented indentation on alumina-alumina/zirconia multilayered composites with residual stressescitations
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article
On the uniqueness of intrinsic viscoelastic properties of materials extracted from nanoindentation using FEMU
Abstract
International audience ; Instrumented nanoindentation is widely used to extract the material properties from the measured force-displacement curves. In this work, the uniqueness/non-uniqueness of the intrinsic viscoelastic properties of materials determined by nanoindentation during load-unload tests is investigated. A four-parameter viscoelastic law with constant Poisson's ratio is used to model the mechanical behavior of a polymer material and a 2D-axisymetric Finite Element Model (FEM) is used to simulate the nanoindentation test. Firstly, a nanoindentation experimental triangular load-unload test is performed on a bulk sample of polypropylene (PP) with a Berkovich indenter tip at a depth rate of 1000 nm/min. The values of the four material parameters are estimated by the Finite Element Model Updating (FEMU). The numerical results can accurately fit the experimental data. However, several quasi-solutions are shown to exist. These load-unload data allow to identify only three viscoelastic parameters if the Poisson's ratio is known. Secondly, the effect of nanoindentation depth rate, loading type (triangular, trapezoidal, exponential, sinusoidal) and apex angle is numerically investigated using an identifiability index based on the conditioning of the inverse problem. We show a correlation between the identifiability index and the energy dissipated by the material during the tests. The extraction of all material parameters remains impossible using a single test. Finally, some combinations of several nanoindentation triangular tests and indenter tip angles are also investigated. We show that a dual nanoindentation technique (cube corner and Berkovich tips) with triangular load-unload tests is an interesting combination to reliably extract all the viscoelastic parameters, provided that plasticity is taken into account. This result illustrates the interest of using this numerical identifiability index to design nanoindentation experiments to ensure the robustness of the intrinsic viscoelastic properties extraction.