A three-phase composite cylinder model is utilized to study the interaction between screw dislocations and nanoscale inclusions. The stress boundary condition at the interface between nanoscale inclusion and the matrix is modified by incorporating surface/interface stress. The explicit solution to this problem is derived by means of the complex variable method. The explicit expressions of image forces exerted on screw dislocations are obtained. The mobility and the equilibrium positions of the dislocation near one of the inclusions are discussed. The results show that, compared to the classical solution (without interface stress), more equilibrium positions of the screw dislocation may be available when the dislocation is close to the nanoscale inclusion due to consider interface stress. Also, the mobility of the dislocation in the matrix will become more complex than the classical case.
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July 2008
Research Papers
Screw Dislocations in a Three-Phase Composite Cylinder Model With Interface Stress
Q. H. Fang,
Q. H. Fang
College of Mechanics and Aerospace,
Hunan University
, Changsha, 410082, P.R.C.
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Y. W. Liu,
Y. W. Liu
College of Mechanics and Aerospace,
e-mail: liuyouw8294@sina.com
Hunan University
, Changsha, 410082, P.R.C.
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P. H. Wen
P. H. Wen
Department of Engineering, Queen Mary,
University of London
, London, EI 4NS, U.K.
Search for other works by this author on:
Q. H. Fang
College of Mechanics and Aerospace,
Hunan University
, Changsha, 410082, P.R.C.
Y. W. Liu
College of Mechanics and Aerospace,
Hunan University
, Changsha, 410082, P.R.C.e-mail: liuyouw8294@sina.com
P. H. Wen
Department of Engineering, Queen Mary,
University of London
, London, EI 4NS, U.K.J. Appl. Mech. Jul 2008, 75(4): 041019 (8 pages)
Published Online: May 16, 2008
Article history
Received:
July 13, 2007
Revised:
December 25, 2007
Published:
May 16, 2008
Citation
Fang, Q. H., Liu, Y. W., and Wen, P. H. (May 16, 2008). "Screw Dislocations in a Three-Phase Composite Cylinder Model With Interface Stress." ASME. J. Appl. Mech. July 2008; 75(4): 041019. https://doi.org/10.1115/1.2913041
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