... alloys. Also, time-dependent prediction of cutting tool wear has not been addressed adequately. In this study, a theoretical model to predict tool wear in drilling as a function of time and to evaluate tool life of anti-abrasion-, TiAlSiN-, and TiAlN-coated drills are presented. Considering feed rate...

... optimization may start from patterned surfaces where topography can be precisely quantified and the relationship between textures and lubrication performance can be numerically established. Presented in this paper are the concept of the virtual texturing technology, models involved, and a preliminary...

...) is unavoidable and directly affects the mechanical and magnetic performance of the hard disk drive, and is of great interest. The HDI wear has a nonlinear and time-varying nature due to the change of contact force and roughness. To predict the HDI wear evolution, an iterative model of Coupled Head And Disk (CHAD...

..., the probabilistic analysis is based on surrogate models (metamodels), which are developed using the kriging method. An optimum symmetric Latin hypercube algorithm is used for efficient “space-filling” sampling of the design space. The metamodels provide an efficient and accurate substitute to the actual engine...

... will be increased and the bearing contact fatigue life will be decreased accordingly. The axial load effect on the roller bearing fatigue life had been studied by researchers in the past. Because of different assumptions used in their models, quite different predictions were made in their analysis. This work...

... efficiency. However, contact forces generated at the interface of the rotor and fiber tips can lead to eventual bristle fatigue and wear of the seal/rotor system. Therefore, it is important that reliable modeling techniques be developed that can help identify complex relationships among brush seal design...

...Lior Kogut, Mem. ASME; Izhak Etsion, Fellow ASME A model that predicts the static friction for elastic-plastic contact of rough surfaces is presented. The model incorporates the results of accurate finite element analyses for the elastic-plastic contact, adhesion and sliding inception of a single...

...Wen-Zhong Wang; Yu-Chuan Liu; Hui Wang; Yuan-Zhong Hu This paper presents a transient thermal model for mixed lubrication problems in point contacts. The model deterministically calculates pressure and surface temperature by simultaneously solving a system of equations that govern the lubrication...

... presented an elaborate stochastic model assuming a Gaussian distribution of heights, slopes, and curvatures based on finite difference approximations, which becomes equivalent to Nayak’s model if finite values for the variances of the height, slopes, and curvatures can be found in the limit of vanishing...

... at node ( i ) when a unit normal line load acts on the node ( j ). It is assumed that the unit load is uniformly distributed within the element centered at the node ( j ). In addition to the normal load, a friction force is added to the model, by introducing f as the friction coefficient. Using Eqs. ( 7...

.... A combined modeling and experimental approach has been employed. The numerical model has been developed from an earlier circular contact study [1]. In this model, the amount and distribution of the lubricant in the inlet region determines the onset of starvation and predicts the film decay in the contact...

...Q. Jane Wang; Dong Zhu; Herbert S. Cheng; Tonghui Yu; Xiaofei Jiang; Shuangbiao Liu This paper presents an improvement of a simplified approach, namely, the macro-micro approach, used to model the mixed elastohydrodynamic lubrication problems in counterformal contacts, and its comparison with Zhu...

...K. J. Sharif; H. P. Evans; R. W. Snidle; J. P. Newall The paper describes the application of a full non-Newtonian, thermal elastohydrodynamic lubrication (EHL) model for the prediction of film thickness and viscous traction force in a special high speed rolling traction rig. The primary objective...

...Young Sup Kang, Graduate Research Assistant; Farshid Sadeghi, Professor; Mike R. Hoeprich, Senior Research Specialist The objective of this study is to develop models to investigate the effects of contaminants (debris denting process) in heavily loaded rolling and sliding contacts. A dynamic time...

...N. Ye, Graduate Student; K. Komvopoulos, Professor, Fellow ASME A hardness analysis based on finite element simulation results and contact constitutive models is presented for both homogeneous and layered elastic-plastic media. The analysis provides criteria for obtaining the real material hardness...

...Yansong Wang; Q. Jane Wang; Chih Lin A mixed lubrication model is developed to investigate the lubrication of coupled journal-thrust-bearing systems. The governing equations are mapped into a computational domain with a conformal mapping technique developed in a previous study by Wang et al. (2002...

... model, based on a one degree of freedom model was developed in which damping is replaced by an equivalent frictional force in order to gain insight into the dynamic friction coefficient of the individual damping element interfaces. Experimental results, obtained in the form of hysteresis loops were...

...Shunhe Xiong; Richard F. Salant, Fellow, ASME A dynamic model of a contacting mechanical seal for down-hole tools, operating in the mixed lubrication regime, has been constructed. Two dynamic cases are examined: the behavior of the seal after it is subjected to a nonequilibrium initial condition...

...W. Gregory Sawyer,; Kelvin I. Diaz,; Matthew A. Hamilton, and; Brian Micklos A nearly ideal two-dimensional scotch yoke mechanism was constructed to test a model of wear depth as a function cycle number. Model variables include the reciprocating mass, a two dimensional wear-rate, crank radius...

...Stefan Weissner; Uwe Zander; Frank E. Talke A new beam suspension model for load/unload simulations of magnetic hard disk drive sliders is presented. The model is applicable to the load/unload process as well as to the dynamic flying behavior of the slider on the disk. Suspension and gimbal...