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RISPrediction of the Geometry Changes of the Free Boundary During Upsetting by the Slip-Line Theory
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Local values of shear stress at the tool-workpiece interface in plane-strain upsetting were determined from experimental observation of the distorted grid pattern. The friction condition at the ...
Computer-Aided Visioplasticity Solution to Axisymmetric Extrusion Through Curved Boundaries
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A procedure for smoothing the experimental values of the flow function ψ in axisymmetric extrusion through curved boundaries was developed. The analysis was applied to a 45 deg conical die ...
Differential Pressure Extrusion Through Double Reduction Dies
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Differential pressure extrusion using double reduction dies was examined. Axisymmetric extrusion experiments using superplastic eutectic alloy of lead-tin were carried out for both single and double ...
A New Workability Criterion for Ductile Metals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The forming limit curves are important aids in determining the extent of deformation a material can be subjected to during a forming process. In this paper a forming limit criterion for bulk ...
A Theoretical Method for the Analysis of Metal-Working Problems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Theoretical and experimental flow fields of several extrusion ratios of lead extruded in plane strain are compared. The two methods given were derived from the equations describing the mechanics ...
Comparison of Two Complete Solutions in an Axisymmetric Extrusion With Experiment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An upper-bound and a potential solution to a forward extrusion problem were compared with experimental results obtained by the visioplasticity method. The process consisted of extruding a 2-in-dia ...
The Use of Superplastic Alloy of the Eutectic of Lead–Tin for the Analysis of Hot Extrusion Process
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The dynamic similarity of two geometrically similar extrusion processes was examined. The flow lines, values of the flow function ψ, and velocity components were compared for the hot extrusion ...
A Modified Tension Test
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present paper deals with a modified tension test with experimental results for SAE 1020, SAE 1215, and OFHC Cu of standard 12.8 mm (0.505 in.) dia test bars. The tension test was ...
Analysis of Tube Extrusion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Two solutions for the detailed mechanics of tube extrusion are presented. One is based on the theoretical velocity field, and the other on the flow field observed experimentally. The theoretical ...
An Approach to Die Design in Extrusions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The visioplasticity method was used to obtain the complete analysis of stress and strain in axisymmetric extrusions of lead and aluminum at different die angles and friction conditions. The ...