Free Volume Theory
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. SYNTHESIS, CHARACTERIZATION, ADSORPTION AND THERMODYNAMIC STUDIES OF PURE AND BINARY CO2-N2 MIXTURES ON OXYGEN ENRICHED NANOSTRUCTURED CARBON ADSORBENTS
Abstract Oxygen enriched porous carbons have been synthesized by a nanocasting technique using mesoporous zeolite as template and epoxy resin as precursor. Characterization results show the effect of the nanocasting technique on the development of heterogeneous surface, high basicity, and high surface area of 686.37 m2g-1, beneficial for CO2 adsorption. Pure
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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2. Free vibration analysis of nano-tubes consisted of functionally graded bi-semi-tubes by a two-steps perturbation method
Abstract Free vibration of a bimaterial circular nano-tube is investigated. The tube is formed by bonding together a Si3N4/SUS304 functionally graded upper semi tube and a ZrO2/Ti-6Al-4V functionally graded lower semi tube. The material properties of the tube are assumed to vary along the radius according to power law with the power index of upper semi tube
Lat. Am. j. solids struct.. Publicado em: 04/02/2019
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3. Free Vibration Analysis of Reinforced Composite Functionally Graded Plates with Steady State Thermal Conditions
Abstract The present paper deals with free vibration of functionally graded fiber reinforced rectangular plates subjected to thermal loads. The rectangular plates are assumed orthotropic. The continuous grading fiber reinforced plates have a smooth variation in matrix volume fraction in the thickness direction. Two different types of volume fraction profiles
Lat. Am. j. solids struct.. Publicado em: 2017-06
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4. Free Vibration of Laminated Composite Plate with Shape Memory Alloy Fibers
Abstract In the present study, an analytical closed form solution for free vibration response of hybrid composite plate reinforced with shape memory alloy (SMA) fibers is derived. Recovery stresses generated during martensitic phase transformation are obtained based on one- dimensional Brinson's model. The mechanical properties of plate are assumed to be tem
Lat. Am. j. solids struct.. Publicado em: 2016-02
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5. Two-Dimensional Fractional Order Generalized Thermoelastic Porous Material
AbstractIn the work, a two-dimensional problem of a porous material is considered within the context of the fractional order generalized thermoelasticity theory with one relaxation time. The medium is assumed initially quiescent for a thermoelastic half space whose surface is traction free and has a constant heat flux. The normal mode analysis and eigenvalue
Lat. Am. j. solids struct.. Publicado em: 2015-07
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6. Free vibration response of a multilayer smart hybrid composite plate with embedded SMA wires
In this paper, free vibration response of a hybrid composite plate was studied. Effects of some geometrical, physical and material parameters on response of the composite plates embedded with shape memory alloy (SMA) wires were investigated, which have not been reported in the literature thus far. Some of these parameters included important factors affecting
Lat. Am. j. solids struct.. Publicado em: 2014-03
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7. Size-dependent vibrations of post-buckled functionally graded Mindlin rectangular microplates
In this paper, the free vibration behavior of post-buckled functionally graded (FG) Mindlin rectangular microplates are described based on the modified couple stress theory (MCST). This theory enables the consideration of the size-effect through introducing material length scale parameters. The FG microplates made of a mixture of metal and ceramic are consid
Lat. Am. j. solids struct.. Publicado em: 2014
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8. Study of water entry of circular cylinder by using analytical and numerical solutions
Water impact phenomenon in the case of a circular cylinder is an important issue in offshore industry where cross members may be in the splash zone of the incident wave. An analytical method as well as a numerical solution are employed to study the water entry problem of a circular section. The procedure for derivation of the analytical formulas is demonstra
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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9. Gestão do capital de giro: impacto sobre a rentabilidade da empresa e seus determinantes
Working capital management is a relevant subject for financial managers who invest a significant amount of time and effort seeking an ideal balance level of its components, in order to create value for the company (Lamberson, 1995; Appuhami, 2008; Martin e Morgan in Kim e Srinivasan, 1991). Companies are able to reduce financing costs and/or increase the ava
Publicado em: 2010
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10. Experimental analyisis of a hypersonic waverider.
This work presents the results of shock tunnel tests of a Mach 10 waverider with sharp leading edges. The waverider surface was generated from a conical flowfield with the volume and the viscous lift-to-drag ratio as optimization parameters. A compression and expansion ramps were added to the pure waverider surface in order to simulate the flow over a scramj
Publicado em: 2009
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11. Desenvolvimento de um modelo matematico mais rigoroso para polimerização radicalar controlada mediada por radicais nitroxido de estireno / Development of more detailed mathematics model for nitroxide mediated living free radical polymerization (NMRP)
Living Free-Radical Polymerization (LFRP) has been target of much attention in the last years, because it allows getting polymers with a highly controlled microstructure, with narrow distribution of the average molecular weights and polydispersity (PDI) close to unit, and with complex molecular structures (e.g. pure block copolymers), with different architec
Publicado em: 2007
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12. Universal curve of ionic conductivities in binary alkali tellurite glasses
The main objective of this work is to present an analysis and brief discussion of experimental ionic conductivity s data in the binary alkali tellurite system, including on 47 glasses that extend the ionic conductivity range by more than 14 orders of magnitude in a wide compositional range. A 'universal' behavior is obtained, using log sigma or log sigmaT vs
Brazilian Journal of Physics. Publicado em: 2006-09