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Modelling of stress-strain distribution in ECAE by analytical-experimental method

conference contribution
posted on 2006-05-18, 00:00 authored by G Raab, Rimma LapovokRimma Lapovok
It is believed, that uniform simple shear is realized during ECAE resulting in the uniformity of the stress-strain distribution and mechanical properties. However, some experimental facts as well as Finite Element simulation confirm a more complicated and non-uniform strain mode. Despite the increased efficiency of FE packages accounting for temperature, friction condition, tooling configuration and complicated constitutive models, the finite shear strain can not be precisely simulated by plastic flow or incremental models. The simple and precise analytical-experimental method for the direct evaluation of strain distribution during the shear deformation, namely the combined grid method was adopted in this study. This paper describes the theoretical principles, the grid patterns and the calculation of the strains based on the grid node displacements and calculation of stress resulting on integration of equilibrium equations along flow line xs.

History

Volume

2006

Pagination

189-194

Location

San Antonio, Texas

Start date

2006-03-12

End date

2006-03-16

ISBN-10

0873396286

Publication classification

EN.1 Other conference paper

Title of proceedings

TMS Annual Meeting

Publisher

TMS, The Minerals, Metals & Materials Society

Place of publication

Warrendale, Penn

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