Upper bound analysis of thick wall tubes extrusion process through rotating curved dies

Meccanica ◽  
2013 ◽  
Vol 48 (8) ◽  
pp. 1947-1958
Author(s):  
H. Haghighat ◽  
M. Moradmand
Keyword(s):  
Upper Bound ◽  
Extrusion Process ◽  
Thick Wall ◽  
Upper Bound Analysis ◽  
Bound Analysis

An upper-bound analysis of the tube extrusion process

2008 ◽  
Vol 199 (1-3) ◽  
pp. 214-220 ◽  
Author(s):  
R. Ebrahimi ◽  
M. Reihanian ◽  
M. Kanaani ◽  
M.M. Moshksar
Keyword(s):  
Upper Bound ◽  
Extrusion Process ◽  
Upper Bound Analysis ◽  
Tube Extrusion ◽  
Bound Analysis

Upper-Bound Analysis for Change-Channel Angular Extrusion

2009 ◽  
Vol 610-613 ◽  
pp. 838-843
Author(s):  
Tian Mo Liu ◽  
Yu Liu ◽  
Li Wei Lu ◽  
Fu Sheng Pan
Keyword(s):  
Upper Bound ◽  
Deformation Process ◽  
Extrusion Process ◽  
Extrusion Force ◽  
Upper Bound Theorem ◽  
Upper Bound Analysis ◽  
Outer Corner ◽  
Angular Extrusion ◽  
Deformation Patterns ◽  
Bound Analysis

Deformation of the material during 90° change-channel angular extrusion (CCAE) process is analyzed using upper-bound theorem. The mathematical model was established which includes the effect of friction between the sample and inner surface of the die, radius of inner and outer corner of the die, and the dead metal zone on the deformation patterns during change-channel angular extrusion deformation process. The model of parameters is explored in relation to the deformation of the material during the change-channel angular extrusion process. Results showed that the extrusion force increased with the increase of extrusion ratio (a2/b2), friction factor m, out corner and the reduce of inner corner. Further directions for progress in upper-bound analysis in change-channel angular extrusion deformation process are outlined.

Sign in / Sign up

Export Citation Format

Share Document