The carbon supersaturated SKD11 punch and core-die were prepared by the plasma carburizing at 673 K for 14.4 ks. upsetting experiment was performed using this to describe plastic flow of pure titanium β-titanium works in higher reduction thickness than 50%. measured load – stroke relationship utilized frictional behavior on contact interface work materials their hardening process. analyzed inve...

Sheet metal forming problems are typical in nature since they involve geometry, boundary and material non-linearity. Cup drawings involves many parameters like punch and die radius, clearance, lubrication, blank holding force and its trajectories etc. So designing the tools for cup drawing involves a lot of trial and error procedure. To reduce number of costly trial error steps, the process can...

Abstract A discrete-forcing immersed boundary method with permeable membranes is developed to investigate the effect of lubrication on permeations solute and solvent through membrane. The permeation models are incorporated into discretisation at fluid cells including membrane, discretised equations for pressure Poisson equation convection–diffusion represented discontinuities validity proposed ...

The paper proposes a novel nano bearing formed by the physical adsorption of the confined fluid to the solid wall. The bearing is formed between two parallel smooth solid plane walls sliding against one another, where conventional hydrodynamic lubrication theory predicted no lubricating effect. In this bearing, the stationary solid wall is divided into two subzones which respectively have diffe...

In sheet metal forming, draw beads are used to limit the flow of in specific areas stamping die. The value coefficient friction at bead determines achievement desired resistance displacement. This article presents results experimental tests for determining on a using specially developed tribotester. test material consisted CuZn37, CuZn30 and CuZn10 brass sheets various states hardening. Investi...

The force-coupling method (FCM) represents the dynamics of low Reynolds number suspension flows through a distributed, low-order, finite force-multipole expansion and provides an efficient, matrix-free method to solve the mobility problem for the particle motion. In concentrated suspensions, strong short-range lubrication forces are generated between particles in close proximity as fluid in the...

The dynamics of spherical particles near a single plane wall are computed using an extension of the Stokesian dynamics method that includes long-range many-body and pairwise lubrication interactions between the spheres and the wall in Stokes flow. Extra care is taken to ensure that the mobility and resistance tensors are symmetric, positive, and definite—something which is ineluctable for parti...

The motion of an object within a viscous fluid and in the vicinity soft surface induces hydrodynamic stress field that deforms latter, thus modifying boundary conditions flow. This results elastohydrodynamic (EHD) interactions experienced by particle. Here, we derive soft-lubrication model, order to compute all forces torque applied on rigid sphere is free translate rotate near elastic wall. We...