Showing papers in "Tribology International in 1989"

TL;DR: In this paper, the effects of amplitude, time, materials, contact temperature, frequency, stress and environment on fretting wear and fatigue are reviewed on the basis of work carried out by the present authors and by other investigators.

TL;DR: In this article, the authors evaluated the wear properties of different types of ceramics (silicon nitride, silicon carbide, alumina and zirconia) for the case of oscillating sliding motion at room temperature.

TL;DR: In this paper, a review of correlations between the tribological behaviour of thermoplastics and material properties, the dependency of wear and friction on surface roughness, sliding velocity and contact pressure for various filled polymers is described.

TL;DR: In this article, the friction and wear behavior of self-mated couples of MgOZrO2, Al2O3 and two types of SiSiC were studied under dry sliding conditions in a special pin-on-disc high temperature tribometer.

TL;DR: In this paper, the influence on friction of adsorbed films of polar organic compounds on surfaces sliding or rolling over each other is dependent on the structure of the adorbed species, and an increase of adsorbability of these additives which concentrates them at the metal-oil interface, increases their efficiency.

TL;DR: In this paper, the dry sliding wear of 6061 aluminium alloy and composites containing up to 14 vol.% of graphite particle dispersions prepared by a power metallurgy route was investigated.

TL;DR: In this article, the adhesive and abrasive wear of different types of coatings on steels was examined and a tabulated compilation of all test results revealed the advantages and disadvantages of the different coatings.

TL;DR: In this article, the effect of bearing shell deformation on the static and dynamic performance characteristics of a four pocket capillary-compensated hydrostatic journal bearing have been studied, where the finite element method has been used to solve the Reynold's equation governing the lubricant flow in the clearance space of a hydrostatic bearing and the three-dimensional elasticity equations governing the displacement field in the bearing shell.

TL;DR: In this article, sliding wear studies on different polyimide (PI) formulations against hardened, smooth steel were conducted using a pin-on-ring testing facility, where contact pressure p was varied in such a way that for three different sliding velocities v (0.6, 1.5 and 3.0 m s−1) two pv levels could be maintained.

TL;DR: In this article, a study of the thermo-elastohydrodynamic effects in journal bearings is presented, where the finite element method has been used to solve the governing equations, and the conventional threedimensional energy equation is modified to account for the flow of lubricant in the cavitation region.

TL;DR: In this paper, the ageing characteristics of two competing lubricants, monograde and multigrade crankaase oils, have been studied and a combination of oil acidity, deposit formation and infra-red spectroscopy were used to follow the ageing of the lubricating oils.

TL;DR: The analysis of pneumatic stability of an integral aerostatic bearing subject to axial loads is carried out with the lumped parameter approach in this article, where the influence of various geometric quantities on the instability range has been analyzed.

TL;DR: In this paper, the effects of bearing liner elastic deformation and lubricant viscosity variation with pressure and temperature are studied for an elliptical bearing, and a range of values of the deformation coefficients are presented for various lubricants taking into account the flexibility of the bearing liner, the static and dynamic performance characteristics of an ellipsis bearing operating at different eccentricity ratios.

TL;DR: In this paper, the progress in understanding rubber abrasion during the past decade is reviewed under three headings of dry, oily, and wet abrasions, including single point contact, line contact, multiple contact, and two-body and three-body abrasions.

TL;DR: In this paper, the effect of 0.2 and 1.0% P in a sand cast flake graphite grey iron on the cavitation erosion behavior in distilled, NaCl, and NaCl/inhibitor waters, has been investigated.

TL;DR: Theoretical and experimental results on the instability of tilting pad bearings are presented in this article, showing that they may be unstable under normal working conditions due to destabilizing factors in the bearings.

TL;DR: In this article, the role of alkaline cylinder lubricants in protecting the metal surface of a crosshead diesel engine has been investigated, and a theory is proposed which stresses the importance of lintern wear as a function of fuel sulphur content, feed rate and alkalinity of the oil.

TL;DR: In this paper, the feasibility of applying this technique to the measurement of wear in the liner of a diesel engine was investigated and the results showed that wear measurements with an accuracy of 0.75 μm were attainable.

TL;DR: In this article, the effect of a continuous phosphide network in matrices of pearlite, ferrite, martensite, and tempered martensites has been investigated on the dry wear of a grey iron, sliding at a speed of 15 m s −1 with stresses of 05 and 20 MPa against cast iron.

TL;DR: In this article, experimental data have been determined for proton ionization and partition of a series of hydroxyalkylamines and their hydrochloride salts between water and a hydrocarbon medium by direct phase contact.

TL;DR: In this article, the influence of various geometrical parameters and of the supply pressure on the characteristic quantities of the integral bearing, both single and opposed, subject to axial loads, has been studied in order to give useful information for producing a better design.

TL;DR: In this article, a study of ball dynamics in the mill and scanning electron microscopy of the used ball surface was carried out to evaluate the wear characteristics and the efficiency of the grinding processes.

TL;DR: In this article, the design of flat pad aerostatic bearings is examined to determine the best inlet arrangement to achieve high load capacity, and the optimum selection of supply to inlet pressure and optimum position of inlet devices can be achieved.

TL;DR: In this article, a featureless white layer both on and below the surface was observed, similar to adiabatic shear bands, and it was suggested that the white layer is a form of microscopic friction weld between asperities.

TL;DR: In this article, the effect of a misaligned sterntube bearing with the propeller shafting was investigated in terms of the shaft's lateral vibration amplitude distribution along the shafting, with the after bearing length reduced to 54% of the original.

TL;DR: In this article, the effects of oil compressibility and inertia on the dynamic behavior of recessed hydrostatic bearing with capillary compensation with a single pad bearing are analyzed. But the results are transferable to other bearing configurations.

TL;DR: In this paper, a new Reynold's equation, which uses Winer's viscoplastic model to express the non-Newtonian fluid property, is derived for line-contact elastohydrodynamic (EHD) problems.

TL;DR: In the fluids tested L. pneumophila did not multiply but was reduced in numbers, and the rate of decline in viability varied from fluid to fluid and between fresh and spoiled fluids.