Results 181 to 190 of about 955,250 (214)

Drying cracks: Kinematics and scale laws

Materials and Structures, 2000
Natural drying of concrete specimens involves a desiccation shrinkage, which can produce significant cracking. The knowledge of its evolution may allow us to estimate the final configuration of the drying cracks. To achieve this, experiments with a micro-concrete have been performed. The visualisation of the cracking network at different ages of drying,
H. Colina, P. Acker
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PARAMETER ESTIMATION OF FICK'S LAW DRYING EQUATION

Drying Technology, 1997
ABSTRACT Distributed parameter drying models such as the Fick's law diffusion model, unlike the lumped parameter model of van Meel whose parameters can be easily estimated by regression, suffer from the difficulty in estimating the parameters of the models quantitatively with accuracy.
Wan Ramli Wan Daud, Mahamad Hakimi Ibrahim, Meor Zainal Meor Talib   +2 more
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Remarks on Constitutive Laws for Dry Granular Materials

AIP Conference Proceedings, 2010
In this paper we resume some remarks upon the model for dry granular materials formulated in [19] which generalized the distributed theory of Goodman & Cowin [24] by allowing the possibility of rotations of grains. Firstly, we reconsider the balance equations for micromomentum and energy by bearing the bulk and rotational effects of granules in mind ...
Pasquale Giovine, Joe Goddard, Pasquale Giovine, James T. Jenkins   +3 more
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Growth law of silicon oxides by dry oxidation

Semiconductor Science and Technology, 1996
A theoretical description of the kinetic mechanism of thermal oxidation in silicon is proposed by complementing the Deal - Grove model. The relationship of the classical linear - parabolic growth law is generalized to the logarithmic growth law which provides a complete description for the whole regime of oxide films.
Keunjoo Kim, Young Hee Lee, Myung Hwan An, Moon Suhk Suh, Chang Joo Youn, Kee Bang Lee, Hyung Jae Lee   +6 more
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Wood drying and Fick's second law

Wood Science and Technology, 1996
The diffusion equation (sometimes referred to as Fick's second law) is derived in terms of water movement under the action of capillary forces. The mass diffusivity is thereby expressed in terms of the capillary diffusion coefficient. A numerical calculation is given for yellow poplar.
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Ejecta scaling laws for craters in dry alluvial sites

Journal of Geophysical Research: Solid Earth, 1989
The existing factor‐of‐20 scatter in the ejecta thickness data, for surface bursts (chemical and nuclear) in dry alluvium, is reduced to a scatter a factor of ∼4 by a simple yield correction. This correction accounts for the mismatch in the scaling laws that govern the formation of the ejecta blanket and of the apparent crater.
C. K. B. Lee, T. A. Mazzola
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Janssen's law and stress fluctuations in confined dry granular materials

Physica A: Statistical Mechanics and its Applications, 2000
In order to clarify the mechanisms which determine the Janssen's law for the pressure distribution at the bottom of a silo we reconsider the so-called q-model describing an assembly of granular particles on a lattice, confined between vertical walls.
MARINI BETTOLO MARCONI, Umberto, A. Petri, A. Vulpiani   +2 more
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Generalized densification law for dry sand subjected to dynamic loading

Soil Dynamics and Earthquake Engineering, 2006
In this paper a generalization of the well known endochronic densification law for dry sand under dynamic loading is presented, taking into account the dependence of its parameters on some measured and calculated sand properties and the variation of these parameters with time.
R. Blázquez, S. López-Querol
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