Showing papers in "Tribology International in 2000"

TL;DR: In this article, a more comprehensive study of the formation, mechanical properties and composition of the tribological surfaces of brake pads was performed using high resolution scanning electron microscopy, nanoindentation, energy dispersive X-ray analysis and three-dimensional profilometry using white light optical interferometry.

TL;DR: In this paper, a numerical procedure for the simulation of three-dimensional surfaces has been developed based on Fast Fourier Transform (FFT), which can simulate surfaces with given spectral density or auto-correlation function (ACF).

TL;DR: A review of contact modeling with an emphasis on the forces of contact and their relationship to the geometrical, material and mechanical properties of the contacting bodies can be found in this paper.

TL;DR: In this article, the friction and wear characteristics of automotive friction materials containing two different phenolic resins were investigated using a pad-on-disk type friction tester, and two different test modes were employed to examine the friction characteristics concerning accumulated thermal history and friction heat.

TL;DR: In this article, a mixed lubrication model is presented by which Stribeck curves can be calculated and subsequently the lubrication regime in which a particular contact operates can be predicted.

TL;DR: In this article, the usefulness of acoustic emission (AE) measurements for the detection of defects in roller bearings has been investigated, and the results showed that ringdown counts of AE signal is a very good parameter for detecting defects both in the inner race and roller of the bearings tested.

TL;DR: In this study, the potential of artificial neural network techniques to predict and analyze the wear behaviour of short fibre reinforced polymeric bearing materials was investigated and it is argued that the results are still reasonable when compared with the substantial wear volume measurement error.

TL;DR: In this article, ambient air, room temperature testing of die-cast (DC) and Thixomolded ® (ThM) AZ91D, in both unidirectional and reciprocating sliding motion, using stainless steel type 440C as the counterface.

TL;DR: In this article, the acoustic emission (AE) measurement method for the monitoring of the lubrication situation in a grease-lubricated rolling bearing was presented. But the results showed that the AE measurement indicated very clearly the lowest contaminant concentration included in the study that was as low as 0.02 weight-%.

TL;DR: In this paper, composites of polyethersulphone (PES) containing short glass fibres (GF) and solid lubricants viz. PTFE and MoS2; and two composites containing short carbon fibre (CF) were selected for the present studies.

TL;DR: In this paper, it has been shown that when water is present, some acids form significantly thicker films, around 10 nm in thickness, similar to that of metal carboxylate additive films, including thick film collapse at high rolling speeds followed by film reformation at slow speeds.

TL;DR: In this article, compression tests were conducted to determine the flow behavior of various types of Plasticine, and it was shown that the strength coefficient and the strain hardening exponent vary significantly among the Plasticine with different colors commercially available.

TL;DR: In this article, a stochastic process was used to solve the problem of isotropic steady-state characteristics of hydrodynamic journal bearings of finite width, considering two types of misalignment, axial (vertical displacement) and twisting (horizontal displacement).

TL;DR: In this article, a kind of on-line wear condition monitoring system for marine diesel engines is introduced, which consists of three functions i.e. particle detecting, lubricant quality detecting and shaft torque moment and instantaneous rotation velocity detecting.

TL;DR: In this paper, two nucleation models are chosen: one based on "mechanical alloying" considerations, and the other linked to high-strain-recrystallisation phenomena.

TL;DR: In this paper, the authors developed new knowledge about the tribological response deriving from the interaction of the substrate/coating-chip system, with special attention to the orthogonal cutting process when chatter-free end turning using natural contact tools.

TL;DR: In this article, the authors studied the transient thermo-elastohydrodynamic behavior of a tilting-pad journal bearing exposed to severe operating conditions, and the influence of several parameters (rotational speed, radial bearing clearance, feeding temperature) on the running time was analyzed in order to predict safe operating conditions.

TL;DR: In this paper, a friction force measurement system using the floating liner method was developed to study the frictional behavior of piston rings and the measurement system was designed to control the effect of the secondary piston motion and to control temperatures of the cylinder wall and oil.

TL;DR: In this article, the second moment of the power spectrum can be expressed in terms of fractal parameters which are intrinsic properties of the surface, and a method for choosing this sampling interval is proposed, based on Archard's observation that repetitive contact must be elastic.

TL;DR: In this article, a rectangular thrust bearing for the most common form of gap non-uniformities, such as tilt, concavity, convexity and waviness at various spatial wavelengths, as well as changes in orifice diameter and position from the bearing edge were analyzed.

TL;DR: In this paper, the design of aerostatic bearings for use within machines requiring nanometre precise translation or rotation is discussed, and the major design parameters which affect aerostastic bearing performance are discussed.

TL;DR: In this article, the conical depression (surface dimple) phenomena observed by Kaneta et al. in optical interferometry experiments are simulated numerically by a complete solution to the simple sliding circular contact thermal elastohydrodynamic lubrication (TEHL) problem.

TL;DR: In this article, the effect of non-linear behavior of the lubricant on the performance of a slot-entry journal bearing was analyzed and the results showed that the combination of nonlinearity factor (K ) and bearing flexibility (C d ) affects the performance significantly.

TL;DR: In this article, the role of the tribochemical reaction to explain the antagonism between zinc dithiophosphate (Zndtp) and polyisobutene succinimide (PIBSI) was studied in the mild wear regime by a dual analysis approach.

TL;DR: In this paper, the effect of contact pressure and slip amplitude on the fatigue limit of a shrink-fit assembly was investigated, and a favorable value for overhang of hub and fillet radius with constant diameter ratio was obtained.

TL;DR: In this paper, hydrodynamic analysis is performed on a semiconductor wafer to understand the mechanism of the chemical mechanical polishing (CMP) process, and the resultant forces and moments acting on the wafer are calculated in typical conditions of the Wafer polishing and nominal clearance of the slurry film, roll and pitch angles at the steady state are obtained.

TL;DR: In this article, the authors analyse the characteristics of a fixed-geometry thrust bearing in typical operating conditions and give experimental results in order to validate future thermohydrodynamic models.

TL;DR: In this paper, the authors investigated the correlation between the shear strength of grease-lubricated roller bearings and the service-length of the bearing and found that high gamma values correspond to high shear stresses in the grease, and thus severe conditions for the thickener.