Study of ECAP based on stream function

被引：9

作者：

Rejaeian, M. ^{[1
]}

Aghaie-Khafri, M. ^{[1
]}

机构：

[1] KN Toosi Univ Technol, Fac Mech Engn, Tehran 1999143344, Iran

来源：

MECHANICS OF MATERIALS | 2014年 / 76卷

关键词：

Stream function; Streamline; Velocity field; Flow pattern; CHANNEL ANGULAR EXTRUSION; FINITE-ELEMENT; TEXTURE EVOLUTION; DEFORMATION;

D O I：

10.1016/j.mechmat.2014.05.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present study, for the first time velocity fields in ECAP's deformation zone was extracted using stream function approach which is a powerful method in fluid mechanic. The extracted velocity field is based on the geometry of die and shape of streamlines. Considering the exponent of stream function (n), countless kinematically admissible velocity fields were derived. Then, the real field that Minimizes the kinematically computed power was determined by the upper bound theorem. Lagrangian descriptions of motion as well as flow pattern of evolving material for different values of (n) were obtained. The flow pattern that was on the basis of the calculated velocity field was fairly well correlated to experimental results. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：27 / 34

页数：8

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