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Compression of Viscoplastic Material Between Rotating Plates
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An analysis is conducted of the two-dimensional flow of Bingham solids between two rotating plates. The maximum friction law is adopted at the plate surface. An asymptotic analysis of the ...
Static Friction Model of Elastic-Plastic Contact Behavior of Surface With Elliptical Asperities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The friction coefficient (μ) of a contact surface with elliptical asperities is examined at various values of the plasticity index (ψ), the effective radius ratio (γ), the shear-strength-pressure ...
An Average Lubrication Equation for Thin Film Grain Flow With Surface Roughness Effects
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A closed-form average lubrication equation for thin film grain flow with the effects of surface roughness is derived. This equation is based on Haff’s grain flow theory and also the flow ...
Contact Behavior of Surfaces Containing Elliptical Asperities With Gaussian and Non-Gaussian Height Distributions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study investigates the effects of asperity interactions on the mean surface separation and real contact area of rough surfaces containing elliptical asperities with Gaussian and non-Gaussian ...
An Elliptical Microcontact Model Considering Elastic, Elastoplastic, and Plastic Deformation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study developed an elastic-plastic microcontact model that considers the elliptical contact of surface asperities. In the elastoplastic regime, the relations of the mean contact pressure and ...
Static Atomistic Simulations of Nanoindentation and Determination of Nanohardness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper develops a nonlinear finite element formulation to analyze nanoindentation using an atomistic approach, which is conducive to observing the deformation mechanisms associated with the ...
Characteristics of Powder Lubricated Finite-Width Journal Bearings: A Hydrodynamic Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper analyzes the performance of hydrodynamic journal bearings by applying the control-volume method to solve the average lubrication equation for grain flow. The grain characteristics, ...
Study of Interfacial Phenomena Affecting Thermosonic Wire Bonding in Microelectronics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thermosonic ball bonding is the method of choice for many interconnections to integrated circuits. This study investigated the effects of bonding parameters on bonding strength using a thermosonic ...
Elastic-Plastic Contact Behavior Considering Asperity Interactions for Surfaces With Various Height Distributions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study investigates the effects of asperity interactions on the mean surface separation and the real contact area for rough surfaces with non-Gaussian height distributions. The effects of ...
Effect of Pressure-Dependency of the Yield Criterion on the Development of Plastic Zones and the Distribution of Residual Stresses in Thin Annular Disks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The main objective of the present paper is to show an effect of pressure-dependency of the yield criterion on the development of the plastic zone and the distribution of residual stresses in ...