Powder flow testing with biaxial and triaxial devices

C. T. David, R. García-Rojo, H. J. Herrmann, S. Luding*

*Corresponding author for this work

Research output: Contribution to conferencePaperAcademicpeer-review

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Abstract

The mechanical response of grains under quasi-static cyclic loading is studied by means of two-and three-dimensional Molecular Dynamics (also called discrete element method). The response of the system is characterized by elastic behavior, softening, plastic yield and critical state flow. Yield is reached for some deformation, and when the contact friction is stronger plastic yield is reached for larger deformation amplitude. In the case of no yield, after many cycles of deformation, accumulation of irreversible plastic strain with the number of cycles is found. For the deviatoric stress and strain, a quasi-periodic ratchet-like behavior is observed. Simulations with different coefficients of friction show weaker plastic strain accumulation in the presence of stronger friction.

Original languageEnglish
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event5th World Congress on Particle Technology, WCPT 2006: AIChE Spring Meeting and Global Congress on Process Safety - Orlando, United States
Duration: 23 Apr 200627 Apr 2006
Conference number: 5

Conference

Conference5th World Congress on Particle Technology, WCPT 2006
Abbreviated titleWCPT 2006
CountryUnited States
CityOrlando
Period23/04/0627/04/06

Keywords

  • Creep
  • Friction
  • Particle simulation
  • Ratcheting
  • Strain accumulation

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