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RISCriterion for Prevention of Central Bursting in Forward Extrusions Through Spherical Dies Using the Finite Element Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Spherical dies are increasing in popularity in the cold-forming industry because of the ease in subsequent secondary operations. This paper presents criteria curves, calculated using the finite ...
Analysis of Spatiotemporal Variations and Flow Structures in a Periodically Driven Cavity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The time-dependent fluid flow in a square cavity was studied using model fluids of glycerol-water solution at different frequencies and amplitudes of motion of the top plate. The range of ...
Development of an Empirical Model to Characterize Fracture Behavior During Forming of Advanced High Strength Steels Under Bending Dominated Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Higher strength advanced high-strength steels (AHSS) such as DP780 and DP980 are more susceptible to fractures at bend radii during press stampings in comparison with more ductile low carbon ...
Extrusion Through Spherical Dies—An Upper Bound Analysis [ASME Journal of Manufacturing Science and Engineering, 124, pp. 92–97]
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Equation (26) should read Ẇf=πR02σ0v0 2m3 r0/R0rf/R0|Δv3|ρ2∂ψ∂ρ2+1ρ sin(ψ)dρwhich causes the friction power losses to be slightly larger than presented in the paper.
Extrusion Through Spherical Dies—An Upper Bound Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An upper bound solution for extrusion through a spherical die has been developed. Equations for the velocity and strain rate fields in the deformation zone are presented. The equations to ...
The Application of Scanning Tunneling Microscopy to Study Lubricant Distribution of Magnetic Thin Film Rigid Disk Surfaces
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A special imaging mode of the scanning tunneling microscope (STM) based on charge trapping was used to probe the uniformity of lubricant distribution on magnetic thin film rigid disks at ...