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Sahoo, S. K.
- A Class of Upper Bound Solutions for Plane-Strain Extrusion
Abstract Views :309 |
PDF Views:0
Authors
N. S. Das
1,
S. K. Sahoo
1
Affiliations
1 Department of Mechanical Engineering, National Institute of Technology, Rourkela, 769 008, IN
1 Department of Mechanical Engineering, National Institute of Technology, Rourkela, 769 008, IN
Source
Manufacturing Technology Today, Vol 4, No 5 (2005), Pagination: 17-22Abstract
In the present investigation a class of upper bound solutions are proposed for plane-strain extrusion through square dies at different area reductions. The variation of normalized mean extrusion pressure with area reduction has been computed for a number of die geometries and for different values of friction conditions at the interfaces. A non-linear optimization procedure for calculation of the best upper bound is used. The method eliminates the constraints by a simple change of variables thus transforming the usual constrained problem to an unconstrained problem so that more complex velocity fields may be analyzed by the proposed procedure. The results are compared with slipline field analysis.- Experimental Study of Strip Extrusion
Abstract Views :163 |
PDF Views:0
Authors
N. S. Das
1,
S. K. Sahoo
1
Affiliations
1 Department of Mechanical Engineering, National Institute of Technology, Rourkela, 769 008, IN
1 Department of Mechanical Engineering, National Institute of Technology, Rourkela, 769 008, IN
Source
Manufacturing Technology Today, Vol 2, No 11 (2003), Pagination: 18-22Abstract
In the present investigation, experimental studies were carried out with a view to compare some theoretically predicted plane-strain extrusion loads with experiment, taking into account friction at the billet-die and billet-container interfaces. The study was confined to square dies only and a laboratory extrusion apparatus was used for the purpose with lead as the work material.- Forging off a Truncated Cone:An Upper Bound Analysis
Abstract Views :166 |
PDF Views:0
Authors
S. K. Sahoo
1,
N. S. Das
1
Affiliations
1 Department of Mechanical Engineering, Eegional Engineering College, Rourkela-769 008, IN
1 Department of Mechanical Engineering, Eegional Engineering College, Rourkela-769 008, IN