The mechanical response of grains under quasi-static cyclic loading is studied by means of a threedimensional Molecular Dynamics scheme. The response of the system is characterized by an accumulation of plastic deformation with increasing number of cycles. From the (deviatoric) stressstrain relation a ratchet-like behavior is observed: Increasing the coefficient of friction leads to a transition from ratcheting to shake-down, i.e., the accumulation of strain stops. The strain rate shows a sharp transition when friction is increases above a certain value, whereas the fraction of sliding contacts shows a smooth, continuous transition, indicating that both effects are decoupled.
|Title of host publication||PARTEC 2007, 27-29 March 2007, Nuremberg, Germany|
|Editors||W. Peukert, C. Schreglmann|
|Place of Publication||Nuernberg, Germany|
|Publisher||Institute of Particle Technology, University of Erlangen.remberg and NurnbergMesse, Germany|
|Number of pages||4|
|Publication status||Published - 27 Mar 2008|
|Event||International Congress on Particle Technology, PARTEC 2007 - Nuremberg, Germany|
Duration: 27 Mar 2007 → 29 Mar 2007
|Publisher||University of Erlangen-Nuremberg, Institute of Particle Technology|
|Conference||International Congress on Particle Technology, PARTEC 2007|
|Period||27/03/07 → 29/03/07|
Luding, S., David, C. T., Garcia-Rojo, R., & Herrmann, H. J. (2008). Frictional powders: Ratchetting under periodic strain in 3D (CD rom Paper no. S 20-5). In W. Peukert, & C. Schreglmann (Eds.), PARTEC 2007, 27-29 March 2007, Nuremberg, Germany (pp. 1-4). Nuernberg, Germany: Institute of Particle Technology, University of Erlangen.remberg and NurnbergMesse, Germany.