1,720,973 research outputs found
Dynamic Admissable States, Negative Absolute Temperature, and the Entropy Maximum Principle
No full textMan, Chi-Sing. (1985). Dynamic Admissable States, Negative Absolute Temperature, and the Entropy Maximum Principle. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/2865
Towards an Acoustoelastic Theory for Measurement of Residual Stress
No full textMan, Chi-Sing. (1986). Towards an Acoustoelastic Theory for Measurement of Residual Stress. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/4446
Two micromechanical models in acoustoelasticity: A comparative study
No full textHerein we derive, under the micromechanical model we proposed earlier, Man and Paroni [14], a complete set of formulae for the twelve material constants in the acoustoelastic constitutive equation for orthorhombic aggregates of cubic crystallites. We present also a second model and compare its predictions on the material constants with those of the first model. Both these models lead to constitutive equations which are indifferent to rotation of reference placement. This allows us to appeal to a new representation theorem (Paroni and Man [15]), which greatly facilitates our derivation of the formulae for the material constants. The second model introduced in this paper is intimately related to some previous averaging theories in the literature. We explain why and in what sense our second model could be taken as a generalization of its predecessors
A Coordinate-Free Approach to the Kinematics of Membranes
No full textMan, Chi-Sing; Cohen, H.. (1985). A Coordinate-Free Approach to the Kinematics of Membranes. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/3044
On the Significance of Normal Stress Effects in the Flow of Glaciers
No full textMan, Chi-Sing; Sun, Quan-Xin. (1986). On the Significance of Normal Stress Effects in the Flow of Glaciers. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/4488
Spherulitic crystallization in binary thin films under solvent-vapor annealing. I. A sharp-interface theory
No full textWe present a thermodynamically consistent theory for solvent-vapor induced spherulitic crystallization in binary thin-film blends, including those which consist of polymeric or organic small-molecule semiconductors. Under the proposed theory, spherulitic growth is interface driven, with no diffusion of any species. The thermodynamic driving force at the interface between the spherulite and amorphous phase is identified, and a kinetic relation that delivers a constant growth rate is proposed. © 2013 AIP Publishing LLC
Modelling of the Heart and Pericardium at End-Diastole
No full textShivakumar, P. N.; Man, Chi-Sing; Rabkin, Simon W.. (1986). Modelling of the Heart and Pericardium at End-Diastole. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/4477
On the geometric autocorrelation function of polycrystalline materials
No full textHerein we derive an expression for direct determination of the geometric autocorrelation function W of a polycrystalline material from images of its grain boundary network (e.g., those delivered by orientation imaging microscopy). We also obtain an identity that relates the mean linear intercept function to a directional derivative of the geometric autocorrelation function. These formulae were applied to examine whether a widely-used formula for W, particularly in theoretical studies of attenuation of elastic waves in polycrystalline media, would be valid for the grain boundary structure of a commercial aluminum alloy. The conclusion was negative
On the Separation of Stress-Induced and Texture-Induced Birefringence in Acoustoelasticity
No full text. In this paper we develop a simple micromechanical model of a prestressed polycrystalline aggregate, in which the texture-induced and stress-induced anisotropies of the aggregate are precisely defined; here the word "texture" always refers to the texture of the aggregate at the given prestressed configuration, not to that of a perhaps fictitious natural state of the aggregate. We use this model to derive, for a prestressed orthotropic aggregate of cubic crystallites, a birefringence formula which shows explicitly the effects of the orthotropic texture on the acoustoelastic coefficients. From this formula we observe that, generally speaking, we cannot separate the total birefringence into two distinct parts, one reflecting purely the influence of stress on the birefringence, and the other encompassing all the effects of texture. The same formula, on the other hand, provides for each material specific quantitative criteria under which the "separation of stress-induced and texture-induce..
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