The modeling of tilting-pad journal and thrust bearings presents a level complexity beyond that with fixed-arc geometry, particularly regard to their dynamic influences. With bearings, the theory surrounding fluid film must be complemented representative pad dynamics. What has been recognized in recent decades is significance support, particular flexibility pivot region pad. typical model for i...

a plain strain analysis of frictional rolling contact on an elastic graded coating is presented in this paper. finite element method is applied to gain an understanding of the stresses and contact zone properties caused during rolling contact. the effects of friction, material stiffness ratio and coating thickness on stresses in contact zone and coating/substrate interface are studied. shear mo...

The subsurface elastic stress fields in plane and axisymmetric contacts with friction under oscillating tangential loading are calculated via a very robust, high-precision method, which operates appropriate superpositions of analytic solutions for the respective Hertzian contact problems. Based on fields, two critical fatigue crack initiation criteria—the Smith-Watson-Topper (SWT) parameter Fin...

The objective of this study was to propose a new analytical model for studying response of head impacts. Head is modeled by fluidfilled ellipsoidal shell of inconstant thickness impacted by a solid elastic sphere. Modeling the head as an ellipsoid is more realistic than modeling it as a sphere, the previous model existing in the literature [3]-[8]. In this model, the effect of Hertzian contact ...

It has been hypothesised that the impact duration of a blunt head impact significantly affects the peak intracranial pressures, and that for short impact durations these pressure peaks could reach sufficient magnitude to cause cavitation in the blood vessels of the brain. Two finite element models of pressure wave propagation in the brain have been developed to explore the pressure response to ...

This article explores the excitation of different vibrational states in a spatially extended dynamical system through theory and experiment. As a prototypical example, we consider a one-dimensional packing of spherical particles (a so-called granular chain) that is subject to harmonic boundary excitation. The combination of the multi-modal nature of the system and the strong coupling between th...

Mechanical properties of soft biological materials are dependent on the responses of the two phases of which they are comprised: the solid matrix and interstitial fluid. Indentation techniques are commonly used to measure properties of such materials, but comparisons between different experimental and analytical techniques can be difficult. Most models relating load and time during spherical in...

We investigate the tunable vibration filtering properties of statically compressed one-dimensional diatomic granular crystals composed of arrays of stainless steel spheres and cylinders interacting via Hertzian contact. The arrays consist of periodically repeated three-particle unit cells (spherecylinder-sphere) in which the length of the cylinder is varied systematically. We investigate the re...