| 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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Pierron, Fabrice
Laboratoire de Mécanique et Procédés de Fabrication
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Into a rapid polymer characterization employing optical measurement systems and high-power ultrasonic excitationcitations
- 2021High strain rate elasto-plasticity identification using the Image-Based Inertial Impact (IBII) test part 1: Error quantificationcitations
- 2021Assessment of the heterogeneous microstructure in the vicinity of a weld using thermographic measurements of the full-field dissipative heat sourcecitations
- 2021Assessment of the heterogeneous microstructure in the vicinity of a weld using thermographic measurements of the full-field dissipative heat sourcecitations
- 2021Data rich imaging approaches assessing fatigue crack initiation and early propagation in a DS superalloy at room temperaturecitations
- 2021High strain rate elasto-plasticity identification using the Image-Based Inertial Impact (IBII) test part 2: Experimental validationcitations
- 2020Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy
- 2020The off-axis IBII test for compositescitations
- 2020Microstructural assessment of 316L stainless steel using infrared thermography based measurement of energy dissipation arising from cyclic loadingcitations
- 2020Image-based inertial impact (IBII) tests for measuring the interlaminar shear moduli of composites
- 2019A Manual for Conducting Image-Based Inertial Impact (IBII) Tests
- 2019Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy
- 2019Image-Based Inertial Impact Test for Characterisation of Strain Rate Dependency of Ti6Al4V Titanium Alloycitations
- 2019A computational approach to design new tests for viscoplasticity characterization at high strain-ratescitations
- 2019Characterising the compressive anisotropic properties of analogue bone using optical strain measurementcitations
- 2019A benchmark testing technique to characterize the stress–strain relationship in materials based on the spalling test and a photomechanical methodcitations
- 2018A novel image-based ultrasonic test to map material mechanical properties at high strain-ratescitations
- 2018Strain accumulation and fatigue crack initiation at pores and carbides in a SX superalloy at room temperaturecitations
- 2018Inertial impact tests to identify the plastic properties of metalscitations
- 2018Image-based inertial impact test for composite interlaminar tensile propertiescitations
- 2018Image-based high strain rate testing of orthopaedic bone cementcitations
- 2018A practical procedure for measuring the stiffness of foam like materialscitations
- 2018An image-based approach for measuring dynamic fracture toughness
- 2018Image-based high strain-rate testing for the characterization of viscoplasticity
- 2017Conception d’un essai purement inertiel pour la caractérisation du comportement dynamique de matériaux métalliques par la Méthode des Champs Virtuels
- 2017Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by SEM-DIC in an advanced disc alloycitations
- 2017Deformation mechanisms of idealised cermets under multi-axial loadingcitations
- 2014The application of digital volume correlation (DVC) to study the microstructural behaviour of trabecular bone during compressioncitations
- 2012Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir weldscitations
- 2012Identification of constitutive properties of composite materials under high strain rate loading using optical strain measurement techniques
- 2011Texture evolution in Nd:YAG-laser welds of AZ31 magnesium alloy hot rolled sheets and its influence on mechanical propertiescitations
- 2011Full-field strain measurement and identification of composites moduli at high strain rate with the Virtual Fields Methodcitations
- 2010Comparison of two approaches for differentiating full-field data in solid mechanicscitations
- 2009Full-field evaluation of the onset of microplasticity in a steel specimen
- 2009Variation of transverse and shear stiffness properties of wood in a treecitations
- 2008Identification of viscoplastic parameters and characterization of Lüders behaviour using digital image correlation and the virtual fields methodcitations
- 2008Identification of heterogeneous constitutive parameters in a welded specimen: Uniform stress and virtual fields methods for material property estimationcitations
- 2008Identification of elasto-visco-plastic parameters and characterization of Lüders behavior using digital image correlation and the virtual fields methodcitations
- 2007Novel experimental approach for longitudinal-radial stiffness characterisation of clear wood by a single testcitations
- 2006Identification of the Through-Thickness Orthotropic Stiffness of Composite Tubes from Full-Field Measurementscitations
- 2006Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields methodcitations
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article
Deformation mechanisms of idealised cermets under multi-axial loading
Abstract
The response of idealised cermets comprising approximately 60% by volume steel spheres in a Sn/Pb solder matrix is investigated under a range of axisymmetric compressive stress states. Digital volume correlation (DVC) analysis of X-ray micro-computed tomography scans (μ-CT), and the measured macroscopic stress-strain curves of the specimens revealed two deformation mechanisms. At low triaxialities the deformation is granular in nature, with dilation occurring within shear bands. Under higher imposed hydrostatic pressures, the deformation mechanism transitions to a more homogeneous incompressible mode. However, DVC analyses revealed that under all triaxialities there are regions with local dilatory and compaction responses, with the magnitude of dilation and the number of zones wherein dilation occurs decreasing with increasing triaxiality. Two numerical models are presented in order to clarify these mechanisms: (i) a periodic unit cell model comprising nearly rigid spherical particles in a porous metal matrix and (ii) a discrete element model comprising a large random aggregate of spheres connected by non-linear normal and tangential “springs”. The periodic unit cell model captured the measured stress-strain response with reasonable accuracy but under-predicted the observed dilation at the lower triaxialities, because the kinematic constraints imposed by the skeleton of rigid particles were not accurately accounted for in this model. By contrast, the discrete element model captured the kinematics and predicted both the overall levels of dilation and the simultaneous presence of both local compaction and dilatory regions with the specimens. However, the levels of dilation in this model are dependent on the assumed contact law between the spheres. Moreover, since the matrix is not explicitly included in the analysis, this model cannot be used to predict the stress-strain responses. These analyses have revealed that the complete constitutive response of cermets depends both on the kinematic constraints imposed by ...