TY  - SER
AU  - Salehi, M. Seyed
AU  - Serajzadeh, S.
TI  - A New Upper Bound Solution  for Analysis OfTwist Extrusion Process with  an Elilptical Die Cross-Section
KW  - Twist Extrusion
KW  - Velocity Field
KW  - Upper Bound Technique
ER  -