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Effects of Lubricant Oil Film Thickness on Seizure Initiation in Cold Extrusion of Aluminium
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A critical condition for seizure initiation has been investigated under a relatively low extrusion speed using an extrusion-type friction testing machine. To examine the effects of lubricant oil ...
Three-Dimensional Stress Fields of Elastic Interface Cracks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Various aspects of stress fields near an interface crack in three-dimensional bimaterial plates are investigated. Due to the nature of the resulting deformation field, three-dimensional effects ...
Dynamic Stability of Annular Plates Under Pulsating Torsion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The dynamic stability of annular plates under periodic torsion is analyzed by means of the Galerkin method in conjunction with Hsu’s procedure. The instability regions associated with both ...
An Analysis of the Two-Bar Ratcheting Behavior Using the Viscoplasticity Theory Based on Overstress (VBO)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The ratcheting behavior of the “unsymmetric two-bar system” was investigated by numerical experiments. The two bars are restrained to the same length and are subjected to a constant load. One ...
Simulations of Crack Propagation in Porous Materials
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Failure propagation behavior of thermally sprayed coatings containing many random pores is investigated. The porous coatings are subjected to either external mechanical loads or residual stresses ...
Extensive Modeling of High-Temperature Deformation Based on Unified Approach
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A unified inelastic constitutive equation is proposed to describe the cyclic inelastic deformation of 2 1/4Cr-1Mo steel at 550°C. In the present study, an evolution of the overstress is ...
Three-Dimensional Stress Field Near the Crack Front of a Thin Elastic Plate
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Based on very detailed full-field finite element analysis of the near tip region of a thin isotropic elastic plate, the three-dimensional stress state in the vicinity of a through-crack front ...
Boring by Plug-Type Rotary Cutting Tool
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new boring process is introduced and machining properties are examined. In this process, a drilled hole is finished with a plug-type rotary cutting tool which has a ring-like cutting edge. ...
Development of Anti-Weldability Test in Metal Forming by Means of Strip-Ironing Type Friction Testing Machine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To develop an anti-weldability test in metal forming, a strip-ironing type friction testing machine was devised to measure simultaneously normal and frictional forces acting on the die during ...
The Frictional Mechanism on the Surface of Metal Being Plastically Deformed by Drawing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To examine welding phenomena in deformation process, two-dimensional drawing-type friction tests have been carried out, using mild steel as the work metal. On the holder-surface a boundary ...