Fracture mechanics of porous ceramics using discrete element simulations

Jauffrès, David, Liu, Xiaoxing and Martin, Christophe L. (2011). Fracture mechanics of porous ceramics using discrete element simulations. In: Mario Guagliano and Laura Vergani, 11th International Conference on the Mechanical Behavior of Materials (ICM11). 11th International Conference on the Mechanical Behavior of Materials (ICM11), Como, Italy, (2719-2724). 5-9 June 2011. doi:10.1016/j.proeng.2011.04.453


Author Jauffrès, David
Liu, Xiaoxing
Martin, Christophe L.
Title of paper Fracture mechanics of porous ceramics using discrete element simulations
Conference name 11th International Conference on the Mechanical Behavior of Materials (ICM11)
Conference location Como, Italy
Conference dates 5-9 June 2011
Proceedings title 11th International Conference on the Mechanical Behavior of Materials (ICM11)   Check publisher's open access policy
Journal name Procedia Engineering   Check publisher's open access policy
Place of Publication Amsterdam, Netherlands
Publisher Elsevier
Publication Year 2011
Sub-type Fully published paper
DOI 10.1016/j.proeng.2011.04.453
Open Access Status DOI
ISBN *****************
ISSN 1877-7058
Editor Mario Guagliano
Laura Vergani
Volume 10
Start page 2719
End page 2724
Total pages 6
Collection year 2012
Language eng
Abstract/Summary The fracture behavior of highly porous ceramics is simulated using the discrete element method. A representative volume element made of spherical particles models the powder used to obtain a partially sintered ceramic material. Three-dimensional porous microstructures made of several tens of thousands of particles are then generated. Elastic force-displacement laws model the bonds formed between particles during sintering. A realistic fracture criterion, based on the local stress intensity factor associated with the bond between two particles, is also introduced. Based on these simulations, we compute the effective strength of these microstructures in tension as a function of the residual porosity. Furthermore, the introduction of a pre-crack in a sample subjected to a remote tensile stress allows the critical stress intensity factor to be calculated. Porous electrodes for electrochemical applications represent an important application field for these ceramics. Those discrete element simulations should be an effective tool for optimizing their microstructure at the submicronic length scale.
Keyword Discrete Element Method
Porous ceramic
Strength
Toughness
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes This issue of Procedia Engineering contains full text of papers presented at the ICM11. Selection and peer-review under responsibility of ICM11.

Document type: Conference Paper
Collections: Non HERDC
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Created: Fri, 14 Oct 2011, 18:22:55 EST by Xiaoxing Liu on behalf of Earth Systems Science Computational Centre