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Strain evolution after fiber failure in a single-fiber metal matrix composite under cyclic loading

  • Jay C. Hanan*
  • , Sivasambu Mahesh
  • , Ersan Üstündag
  • , Irene J. Beyerlein
  • , Geoffrey A. Swift
  • , Bjørn Clausen
  • , Donald W. Brown
  • , Mark A.M. Bourke
  • *Bu çalışma için yazışmadan sorumlu yazar
  • California Institute of Technology
  • Oklahoma State University
  • Los Alamos National Laboratory Materials Science and Technology Division
  • Los Alamos National Laboratory Theoretical Division

Araştırma çıktısı: Dergi yayınıMakaleHakem

10 Atıf (Scopus)

Özet

The evolution of in situ elastic strain with cyclic tensile loading in each phase of a single Al2O3-fiber/aluminum-matrix composite was studied using neutron diffraction (ND). An analytical model appropriate for metal matrix composites (MMCs) was developed to connect the measured axial strain evolution in each phase with the possible micromechanical events that could occur during loading at room temperature: fiber fracture, interfacial slipping, and matrix plastic deformation. Model interpretation showed that the elastic strain evolution in the fiber and matrix was governed by fiber fracture and interface slipping and not by plastic deformation of the matrix, whereas the macroscopic stress-strain response of the composite was influenced by all three. The combined single-fiber composite model and ND experiment introduces a new and quick engineering approach for qualifying the micromechanical response in MMCs due to cyclic loading and fiber fracture.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)33-42
Sayfa sayısı10
DergiMaterials Science and Engineering: A
Hacim399
Basın numarası1-2
DOI'lar
Yayın durumuYayınlandı - 15 Haz 2005
Harici olarak yayınlandıEvet

Finansman

Funding was provided by the National Science Foundation (CAREER grant no. DMR-9985264) at Caltech and a Laboratory-Directed Research and Development Project (no. 2000043) at Los Alamos. The neutron diffraction experiments were conducted at the Lujan Center, LANSCE, a national user facility supported by the Department of Energy, Office of Basic Energy Sciences under contract W-7405-ENG-36. Dr. C. Brian Hooper assisted with the radiographic measurements.

FinansörlerFinansör numarası
Laboratory-Directed Research and Development Project2000043
Los Alamos
National Science FoundationDMR-9985264
U.S. Department of Energy
Basic Energy SciencesW-7405-ENG-36

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