Discrete instabilities in granular materials

 

In the framework of continuum mechanics, it has been shown that Hill’s Condition of Stability can detect diffuse modes of failure as, for example, the ones exhibited by loose sands subjected to undrained triaxial loading, axially stress controlled. The purpose of this paper is to consider a discrete form of Hill’s Condition of Stability and to apply it to discrete element computations. The reference bidimensional discrete material is constituted of wooden piled cylinders and different

 

In the framework of continuum mechanics, it has been shown that Hill’s Condition of Stability can detect diffuse modes of failure as, for example, the ones exhibited by loose sands subjected to undrained triaxial loading, axially stress controlled. The purpose of this paper is to consider a discrete form of Hill’s Condition of Stability and to apply it to discrete element computations. The reference bidimensional discrete material is constituted of wooden piled cylinders and different

boundary conditions simulating slope stability problems have been considered. The numerical results show that the kinetic energy is correlated in space and in time with local and global peaks of negative values ofthe second order work. It is concluded that grain avalanches can be analysed by Hill`s Condition of Stability, which might be considered as a precursor to certain modes of failure.


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AUTORI: Darve F., Laouafa F., Servant G.
RIG ANNO:2002 NUMERO:3
Numero di pagine: 57


Allegato: https://associazionegeotecnica.it/wp-content/uploads/2010/03/RIG_2003_3_57.pdf
Allegato:
Articolo completo: https://associazionegeotecnica.it/wp-content/uploads/2010/03/RIG_2003_3_57.pdf