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The development of physically based micro-mechanics - Based on the characteristic tip field of dislocation pileupBased on the analytical solution by Eshelby et al. (1951) and the numerical calculations by Chou and Li (1969) and Armstrong et al. (1962), it is shown that the force, F, on the locked leading dislocation of a discrete dislocation pileup is capable of characterizing uniquely the stress, strain, and displacement field at the tip of the pileup, including the positions of the discrete mobile dislocations next to the leading dislocation. Conversely, the positions of the mobile dislocations can be used to measure F. The F thus measured can be used to study micro-plastic deformation and micro-fractures at grain boundaries or any other dislocation barriers.
Document ID
19910037553
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gao, Q.
(Southwest Jiaotong University Chengdu, People's Republic of China, United States)
Liu, H. W.
(Syracuse University NY, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Theoretical and Applied Fracture Mechanics
Volume: 13
ISSN: 0167-8442
Subject Category
Structural Mechanics
Accession Number
91A22176
Funding Number(s)
CONTRACT_GRANT: NAG3-837
Distribution Limits
Public
Copyright
Other

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