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RISBiaxial Thermomechanical-Fatigue Life Property of a Directionally Solidified Ni-Base Superalloy
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High-temperature components in thermal power plants are subjected to creep-fatigue loading where creep cavities initiate and grow on grain boundaries. Development of life assessment methods of ...
Film Thickness and Rolling Resistance in Starved Elastohydrodynamic Lubrication of Point Contacts With Reflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Elastohydrodynamic lubrication (EHL) film thickness and rolling resistance play a critical role in determining friction, wear, life, and other tribological characteristics of rolling bearings. Although film thickness ...
Nonlinear Dynamic Responses of Elastic Structures With Two Rectangular Liquid Tanks Subjected to Horizontal Excitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Nonlinear vibrations of an elastic structure with two partially filled liquid tanks subjected to horizontal harmonic excitation are investigated. The natural frequencies of the structure and ...
Nonlinear Responses of Dual-Pendulum Dynamic Absorbers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The nonlinear responses of a single-degree-of-freedom system with two pendulum tuned mass dampers under horizontal sinusoidal excitation are investigated. In the theoretical analysis, van der Pol’s ...
Degradation of Perfluoropolyether Fluids With Metal Ions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Chemical degradation of lubricant fluids of perfluoropolyether (PFPE), such as Fomblin Z-DOL, Fomblin AM-2001, Fomblin Z-25, Demnum SP-3, and Demnum SA, with bivalent metal ions was examined. The ...
On the Simplification of Transfer Functions of Linear Dynamical Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A method for the simplification of transfer functions of linear dynamical systems is presented. The sampled input and output data of the original system are used, and the least squares fit ...
Bifurcation Phenomena Caused by Multiple Nonlinear Vibration Absorbers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The characteristics of two, three, and four nonlinear vibration absorbers or nonlinear tuned mass dampers (NTMDs) attached to a structure under harmonic excitation are investigated. The frequency ...
Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Polycrystalline conventional casting (CC) and directionally solidified (DS) Ni base superalloys are widely used as gas turbine blade materials. It was reported that the surface of a gas turbine ...
DYNAMICAL INTERACTION BETWEEN THE LOWER STRATOSPHERE AND THE TROPOSPHERE
Publisher: American Meteorological Society
Abstract: The vertical flux of geopotential and the conversion between eddy available potential and eddy kinetic energy due to non-stationary disturbances are studied by solving numerically the diagnostic as well as the prognostic ...
Stability of the Walker Circulation
Publisher: American Meteorological Society
Abstract: A stability analysis is made for the east-west Walker circulation in the tropics by means of eigenfrequency calculations of a small perturbation. The characteristic equations are formulated based on the assumption that the ...