Quasicontinuum Models of Interfacial Structure and Deformation

Journal Article · Wed Dec 31 23:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.80.742· OSTI ID:573904

Shenoy, V B; Miller, R; Phillips, R ^[1]; Tadmor, E B ^[2]; Ortiz, M ^[3]

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1. Division of Engineering, Brown University, Providence, Rhode Island 02912 (United States)
2. Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
3. Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, California 91125 (United States)

Microscopic models of the interaction between grain boundaries (GBs) and both dislocations and cracks are of importance in understanding the role of microstructure in altering the mechanical properties of a material. A recently developed mixed atomistic and continuum method is reformulated to allow for the examination of the interactions between GBs, dislocations, and cracks. These calculations elucidate plausible microscopic mechanisms for these defect interactions and allow for the quantitative evaluation of critical parameters such as the force needed to induce GB migration. {copyright} {ital 1998} {ital The American Physical Society}

• DOE Contract Number: FG02-95ER14561
• OSTI ID: 573904
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRACKS
DISLOCATIONS
FINITE ELEMENT METHOD
GRAIN BOUNDARIES
INTERFACES
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE