Shakedown limits on coated and engineered surfaces

Effects of displacement amplitude on fretting wear behaviors and mechanism of Inconel 600 alloy

“…According to material hardening laws, loading conditions will maintain an elastic response, whereas, above this critical cyclic stress state, the material will undergo accumulated plastic dissipation [20][21][22]. With the increase of displacement amplitude, the worn scars transform from round to ellipsoidal shape elongated along the fretting direction, which is presumed to be due to the pushing of spherical specimen against the edge, leading to high shear stress and localized plasticity [6,23].…”

The evolution and failure of pearlitic microstructure in rail steel – observations and modelling

“…the results are quick and parametric so it is easy to see the effect of material properties such as hardness on the shakedown limit. this approach has been extensively used by the Johnson group (Johnson, 1962;ponter et al, 1985;Bower and Johnson, 1991;Johnson, 1992) for determining lower bounds and the kapoor group Williams, 1994, 1996;Wong et al, 1997a;Dyson et al, 1999) for determining upper bounds. additional results for shakedown limits for line contact (such as obtained in two contacting parallel cylinders), point contact (two contacting spheres) and elliptic contacts (two general smooth bodies such as eggs) are available Wong et al, 1996Wong et al, , 1997bJones et al, 1997;Williams et al, 1999).…”

Plane strain sliding contact of multilayer magnetic storage thin-films using the finite element method

“…Step-2 (d y = 5 nm, l = 0.5): a von Mises; b max tensile principal; c max compressive principal; d shear 3.5 Effect of repeated sliding contact Repeated sliding contact behavior of materials undergoing permanent deformation can be broadly classified into three different kinds (Johnson 1995;Wong et al 1997), as depicted schematically in Fig. 11.…”