Powder flow testing with biaxial and triaxial devices

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

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 conference › Paper › peer-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 language	English
Publication status	Published - 1 Dec 2006
Externally published	Yes
Event	5th World Conference of Particle Technology, WCPT 2006: AIChE Spring Meeting and Global Congress on Process Safety - Orlando, United States Duration: 23 Apr 2006 → 27 Apr 2006 Conference number: 5

Conference

Conference	5th World Conference of Particle Technology, WCPT 2006
Abbreviated title	WCPT5
Country/Territory	United States
City	Orlando
Period	23/04/06 → 27/04/06

Keywords

Creep
Friction
Particle simulation
Ratcheting
Strain accumulation

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title = "Powder flow testing with biaxial and triaxial devices",

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.",

keywords = "Creep, Friction, Particle simulation, Ratcheting, Strain accumulation",

author = "David, {C. T.} and R. Garc{\'i}a-Rojo and Herrmann, {H. J.} and S. Luding",

year = "2006",

month = dec,

day = "1",

language = "English",

note = "5th World Conference of Particle Technology, WCPT 2006 : AIChE Spring Meeting and Global Congress on Process Safety, WCPT5 ; Conference date: 23-04-2006 Through 27-04-2006",

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TY - CONF

T1 - Powder flow testing with biaxial and triaxial devices

AU - David, C. T.

AU - García-Rojo, R.

AU - Herrmann, H. J.

AU - Luding, S.

N1 - Conference code: 5

PY - 2006/12/1

Y1 - 2006/12/1

N2 - 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.

AB - 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.

KW - Creep

KW - Friction

KW - Particle simulation

KW - Ratcheting

KW - Strain accumulation

UR - http://www.scopus.com/inward/record.url?scp=56749169722&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:56749169722

T2 - 5th World Conference of Particle Technology, WCPT 2006

Y2 - 23 April 2006 through 27 April 2006

ER -

Powder flow testing with biaxial and triaxial devices

Abstract

Conference

Keywords

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