Modeling mechanical behaviors of composites with various ratios of matrix–inclusion properties using movable cellular automaton method

A. Yu Smolin, E. V. Shilko, S. V. Astafurov, I. S. Konovalenko, S. P. Buyakova, S. G. Psakhie

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Two classes of composite materials are considered: classical metal–ceramic composites with reinforcing hard inclusions as well as hard ceramics matrix with soft gel inclusions. Movable cellular automaton method is used for modeling the mechanical behaviors of such different heterogeneous materials. The method is based on particle approach and may be considered as a kind of discrete element method. The main feature of the method is the use of many-body forces of inter-element interaction within the formalism of simply deformable element approximation. It was shown that the strength of reinforcing particles and the width of particle-binder interphase boundaries had determining influence on the service characteristics of metal–ceramic composite. In particular, the increasing of strength of carbide inclusions may lead to significant increase in the strength and ultimate strain of composite material. On the example of porous zirconia ceramics it was shown that the change in the mechanical properties of pore surface leads to the corresponding change in effective elastic modulus and strength limit of the ceramic sample. The less is the pore size, the more is this effect. The increase in the elastic properties of pore surface of ceramics may reduce its fracture energy.

Original languageEnglish
Pages (from-to)18-34
Number of pages17
JournalDefence Technology
Volume11
Issue number1
DOIs
Publication statusPublished - 1 Mar 2015

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Keywords

  • Composites
  • Gel
  • Many-body interaction
  • Metal ceramics
  • Modeling
  • Movable cellular automata
  • Zirconia ceramics

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanical Engineering
  • Ceramics and Composites
  • Metals and Alloys

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