| 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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Pasternak, Elena
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Topics
Publications (15/15 displayed)
- 2023Implication of Different Types of Post-peak Behaviour in Lateral Direction on Failure of Class II Rocks in Uniaxial Compressioncitations
- 2022Possible mechanism of spallation in rock samples under uniaxial compressioncitations
- 2019Effective properties of layered auxetic hybridscitations
- 2017Behavior of Extreme Auxetic and Incompressible Elastic Materialscitations
- 2017Extracting real-crack properties from non-linear elastic behaviour of rockscitations
- 2017Transitional negative stiffness and numerical modelling of failure of particulate material
- 2017Extracting shear and normal compliances of crack-like defects from pressure dependences of elastic-wave velocitiescitations
- 2016Wave propagation in materials with negative Cosserat shear moduluscitations
- 2016Deformation analysis of reinforced-core auxetic assemblies by close-range photogrammetrycitations
- 2016Thermal stresses in hybrid materials with auxetic inclusionscitations
- 2015Negative Poisson's ratio in hollow sphere materialscitations
- 2015Hybrid materials with negative Poisson's ratio inclusionscitations
- 2007Percolation mechanism of failure of a planar assembly of interlocked osteomorphic elementscitations
- 2006Cracks of higher modes in Cosserat continuacitations
- 2004On the possibility of elastic strain localisation in a faultcitations
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document
Transitional negative stiffness and numerical modelling of failure of particulate material
Abstract
We observed negative stiffness effect during the bond breakage in a simple 4 discs PFC 2D simulation. This negative stiffness effect only exists during the transitional time during which the model regains equilibrium. We subsequently call this negative stiffness effect - transitional negative stiffness effect. It can be shown the instability of geomaterials is reached when the (incremental) Poisson’s ratio reached value of 1(2D case). Hence we embarked on verifying the hypothesis that the peak load coincides with the critical incremental Poisson’s ratio. We demonstrate that the peak on the stress-strain curve corresponds to the incremental Poisson’s ratio reaching 1. This gives a confirmation that the transitional negative stiffness can be responsible for the global instability of particulate materials.