A numerical simulation of fabric development in polycrystalline aggregates with one slip system

Y. Zhang, B. E. Hobbs, A. Ord

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Fabric development and grain deformation behaviour in polycrystalline aggregrates involving one slip system have been numerically simulated. The model allows inhomogeneous deformation while still ensuring strain compatibility and overall stress equilibrium. Two types of inhomogeneous deformation occur in deformed polycrystals. Inter-grain strain inhomogeneity results from the contrasting deformability of neighbouring grains, which is dominantly determined by the corresponding initial slip-plane orientation. Intra-grain strain inhomogeneity arises because of the need to achieve strain compatibility across grain boundaries. Grain boundaries are generally the places where strain compromise is reached between neighbouring grains. Various microstructures are developed in deformed polycrystals. The development of kink-subgrain structures, a special type of subgrain observed in this model, is closely controlled by initial lattice orientation. The pattern of preferred orientations of slip planes is sensitive to strain history. In contrast, the preferred orientations of longer axes of deformed grains or passive plates in a deforming ductile medium are always parallel to the bulk extension direction, not showing any relevance to deformation history.

Original languageEnglish
Pages (from-to)1297-1313
Number of pages17
JournalJournal of Structural Geology
Volume16
Issue number9
DOIs
Publication statusPublished - 1 Jan 1994
Externally publishedYes

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preferred orientation
grain boundary
inhomogeneity
simulation
history
microstructure
fabric

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abstract = "Fabric development and grain deformation behaviour in polycrystalline aggregrates involving one slip system have been numerically simulated. The model allows inhomogeneous deformation while still ensuring strain compatibility and overall stress equilibrium. Two types of inhomogeneous deformation occur in deformed polycrystals. Inter-grain strain inhomogeneity results from the contrasting deformability of neighbouring grains, which is dominantly determined by the corresponding initial slip-plane orientation. Intra-grain strain inhomogeneity arises because of the need to achieve strain compatibility across grain boundaries. Grain boundaries are generally the places where strain compromise is reached between neighbouring grains. Various microstructures are developed in deformed polycrystals. The development of kink-subgrain structures, a special type of subgrain observed in this model, is closely controlled by initial lattice orientation. The pattern of preferred orientations of slip planes is sensitive to strain history. In contrast, the preferred orientations of longer axes of deformed grains or passive plates in a deforming ductile medium are always parallel to the bulk extension direction, not showing any relevance to deformation history.",
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A numerical simulation of fabric development in polycrystalline aggregates with one slip system. / Zhang, Y.; Hobbs, B. E.; Ord, A.

In: Journal of Structural Geology, Vol. 16, No. 9, 01.01.1994, p. 1297-1313.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Zhang, Y.

AU - Hobbs, B. E.

AU - Ord, A.

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N2 - Fabric development and grain deformation behaviour in polycrystalline aggregrates involving one slip system have been numerically simulated. The model allows inhomogeneous deformation while still ensuring strain compatibility and overall stress equilibrium. Two types of inhomogeneous deformation occur in deformed polycrystals. Inter-grain strain inhomogeneity results from the contrasting deformability of neighbouring grains, which is dominantly determined by the corresponding initial slip-plane orientation. Intra-grain strain inhomogeneity arises because of the need to achieve strain compatibility across grain boundaries. Grain boundaries are generally the places where strain compromise is reached between neighbouring grains. Various microstructures are developed in deformed polycrystals. The development of kink-subgrain structures, a special type of subgrain observed in this model, is closely controlled by initial lattice orientation. The pattern of preferred orientations of slip planes is sensitive to strain history. In contrast, the preferred orientations of longer axes of deformed grains or passive plates in a deforming ductile medium are always parallel to the bulk extension direction, not showing any relevance to deformation history.

AB - Fabric development and grain deformation behaviour in polycrystalline aggregrates involving one slip system have been numerically simulated. The model allows inhomogeneous deformation while still ensuring strain compatibility and overall stress equilibrium. Two types of inhomogeneous deformation occur in deformed polycrystals. Inter-grain strain inhomogeneity results from the contrasting deformability of neighbouring grains, which is dominantly determined by the corresponding initial slip-plane orientation. Intra-grain strain inhomogeneity arises because of the need to achieve strain compatibility across grain boundaries. Grain boundaries are generally the places where strain compromise is reached between neighbouring grains. Various microstructures are developed in deformed polycrystals. The development of kink-subgrain structures, a special type of subgrain observed in this model, is closely controlled by initial lattice orientation. The pattern of preferred orientations of slip planes is sensitive to strain history. In contrast, the preferred orientations of longer axes of deformed grains or passive plates in a deforming ductile medium are always parallel to the bulk extension direction, not showing any relevance to deformation history.

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