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RISDynamic Strength Criterion for Concrete
Publisher: American Society of Civil Engineers
Abstract: An integral dynamic strength criterion for concrete is proposed, which accounts for the short duration stress history in the range idealized as elastic. The concept of critical value of generalized stress impulse, proposed ...
Modelling Friction Under Complex Motion Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An analytical model of friction under combined linear sliding and spin of the contact area is presented. It is shown that the model, although based on simplifying assumptions, predicts reasonably ...
An Analysis of Contact Between a Pair of Surface Asperities During Sliding
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An analysis of friction junction formed by a pair of interacting hemispherically shaped surface asperities was carried out. Depending on the maximum geometrical interference of the asperities ...
Membrane Locking and Reduced Integration for Curved Elements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The behavior of a curved beam element is studied by comparison to an analytic solution. In the curved beam element, curvature effects are incorporated through a “shallow-shell” type theory. It ...
Acoustic Journal Bearing With Changeable Geometry and Built-in Flexibility
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The influence of embodiment flexibility on the performance of an acoustic journal bearing is presented. Two completely different embodiments of the bearing were investigated using three criteria of performance assessment ...
Use of Near-Field Acoustic Levitation in Experimental Sliding Contact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper presents an investigation into producing the self-levitation effect using piezo-electric actuators (PZTs). Self-levitation has been demonstrated and results are presented and discussed. A ...
The Influence of Linear and Rotating Motions on the Friction of Polymers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A series of experiments are described where combined linear and rotating motions are imposed upon a polymer while it is in contact with a smooth and clean counterface. Friction data are ...
Flow–Structure Interaction Simulations of the Aortic Heart Valve at Physiologic Conditions: The Role of Tissue Constitutive Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The blood flow patterns in the region around the aortic valve depend on the geometry of the aorta and on the complex flow–structure interaction between the pulsatile flow and the valve leaflets. Consequently, the flow ...
Dynamics of Flexible Beams and Plates in Large Overall Motions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The dynamic response of flexible beams, plates, and solids undergoing arbitrary spatial motions are systematically derived via a proposed approach. This formulation is capable of incorporating ...
The Ozone Hole of 2002 as Measured by TOMS
Publisher: American Meteorological Society
Abstract: Since its discovery in 1985, the ozone hole has been regularly mapped using the data from Total Ozone Mapping Spectrometer (TOMS) instruments on several satellites. The current TOMS, on the Earth Probe satellite, has been ...