One dimensional model of vein structure evolution

A numerical model describing the formation of the dislocation vein matrix structure and its transformation onto the wall structure of persistent slip bands is presented. One active slip system is assumed. The equations used in this model are based on the continuum mechanics approach and the balance...

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Bibliographic Details
Published in:Key engineering materials 1994-09, Vol.97-98, p.491-496
Main Author: Zatloukal, J
Format: Article
Language:English
Online Access:Get full text
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Summary:A numerical model describing the formation of the dislocation vein matrix structure and its transformation onto the wall structure of persistent slip bands is presented. One active slip system is assumed. The equations used in this model are based on the continuum mechanics approach and the balance law of dislocation loops. The numerical model provides a qualitative simulation of some typical phenomena which appear during transformation, such as disintegration of veins and vein rebuilding to two walls, direct rebuilding of one vein to one wall, and forming of new walls in the middle of wall spacings. The computed stress-strain diagrams exhibit a considerable stress decrease after the vein matrix structure disintegration, which results in localization of deformation. (Author)
ISSN:1013-9826