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RISA General Formulation for Hydroforming of Arbitrarily-Shaped Boxes and Its Application to Hydroforming of an Elliptic-Circular Box
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A general kinematically admissible velocity field is suggested for the upper-bound solution of hydroforming of arbitrarily-shaped boxes. The suggested formulation is then applied to hydroforming ...
A Numerical Investigation into Hot Square Die Extrusion of an L-Section Considering the Variation of Die Bearing Length
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The variation of die bearing length is a primary way to control the metal flow in hot square die extrusion. Finite element computations are carried out to assess the influences of die bearing ...
Elastic-Plastic Finite Element Analysis of Deep Drawing Processes by Membrane and Shell Elements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Both cylindrical cup drawing and square cup drawing are analyzed using both membrane analysis and shell analysis by the elastic-plastic finite element method. An incremental formulation incorporating ...
Analysis of Hydrostatic Bulging of Anisotropic Rectangular Diaphragms by the Rigid-Plastic Finite Element Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A variational formulation is derived for the incremental analysis of the nonsteady large deformation of normal anisotropic sheet metal which exhibits a rigid-plastic work-hardening behavior. The ...
An Investigation into the Relationship between Torque and Load in Ring Rolling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the ring-rolling process most of the required forming energy is transferred from the roll into the deforming region by the aid of friction between the roll surface and the ring. In this ...
A New Formulation of Generalized Velocity Field for Axisymmetric Forward Extrusion Through Arbitrarily Curved Dies
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new analytic method is proposd for estimating the extrusion pressure, the final effective strain of the extruded billet, and the grid distortion patterns in axisymmetric forward extrusion ...
An Analysis of Three-Dimensional Upset Forging of Regular Polygonal Blocks by Using the Upper-Bound Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A simple kinematically admissible velocity field for three-dimensional deformation in upset forging of regular polygonal blocks is proposed which takes into account the sidewise spread as well ...
Hydrofilm Extrusion of Tubes Through Optimized Curved Dies
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An analytical method for hydrofilm extrusion of axisymmetric tubes through optimized curved dies is proposed. The upper-bound method and hydrodynamic lubrication theory are used in combination. ...
Backward Extrusion of Internally Shaped Tubes From Round Billets
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An analytical method is proposed for estimating the steady-state punch pressure for three-dimensional backward extrusion (or piercing) of complicated internally shaped tubes from circular billets. ...
Roll Torque and Pressing in Plane-Strain Ring Rolling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A simple method of analysis using force polygon diagrams is proposed for determining roll torque and pressing load, in particular plane-strain ring rolling processes. Pressing velocity together ...