Materials Science & Technology

FULLTEXT SEARCH
NEW: Advanced Search

An Upper Bound Solution for a Two-Layer Cylinder Subject to Compression and Twist

Journal Key Engineering Materials (Volumes 345 - 346)
Volume The Mechanical Behavior of Materials X
Edited by S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages 37-40
DOI 10.4028/www.scientific.net/KEM.345-346.37
Citation Gow Yi Tzou et al., 2007, Key Engineering Materials, 345-346, 37
Online since August, 2007
Authors Gow Yi Tzou, Sergei Alexandrov
Keywords Limit Load, Maximum Friction Law, Singular Velocity Field, Twist, Two-Layer Cylinder
Abstract

The choice of a kinematically admissible velocity field has a great effect on the predictive capacity of upper bound solutions. It is always advantageous, in addition to the formal requirements of the upper bound theorem, to select a class of velocity fields satisfying some additional conditions that follow from the exact formulation of the problem. In the case of maximum friction law, such an additional condition is that the real velocity field is singular in the vicinity of the friction surface. In the present paper this additional condition is incorporated in the class of kinematically admissible velocity fields chosen for a theoretical analysis of two - layer cylinders subject to compression and twist. An effect of the angular velocity of the die on process parameters is emphasized and discussed.

Full Paper PDF Get the full paper by clicking here

First page example

Preview of first page