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Micromechanical modeling of non-linear stress-strain behavior of polycrystalline microcracked materials under tension

Journal Article · · Acta Materialia
 [1];  [2];  [3];  [4]
  1. Bundesanstalt fur Materialforschung und -prufung, Berlin (Germany); Univ. of Potsdam, Potsdam (Germany)
  2. Tufts Univ., Medford, MA (United States); R.E.Alexeev Nizhny Novgorod Technical Univ., Nizhny Novgorod (Russia)
  3. New Mexico State Univ., Las Cruces, NM (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations
The stress-strain behavior of microcracked polycrystalline materials (such as ceramics or rocks) under conditions of tensile, displacement-controlled, loading is discussed. Micromechanical explanation and modeling of the basic features, such as non-linearity and hysteresis in stress-strain curves, is developed, with stable microcrack propagation and “roughness” of intergranular cracks playing critical roles. Experiments involving complex loading histories were done on large- and medium grain size β-eucryptite ceramic. As a result, the model is shown to reproduce the basic features of the observed stress-strain curves.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1481704
Alternate ID(s):
OSTI ID: 1755446
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 164; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (11)

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Related Subjects

36 MATERIALS SCIENCE
Ceramics
Hysteresis
Nonlinearity
Polycrystals
Rocks
Stress-strain relations
Tension