Results 91 to 100 of about 141 (133)
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Elastic and anelastic structure of the Earth
Reviews of Geophysics, 1979The objective of this review is to outline the progress made in the last four years in studies of global or large scale properties of the Earth. Work related to strictly regional structure of the crust and the uppermost mantle is described in other reports in this volume.During the previous reporting period 1971–1974 (Anderson, 1975) there was a large ...
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Elastic and anelastic properties of rare earth phosphate glasses
Journal of Non-Crystalline Solids, 1990Abstract The behaviour of the ultrasonic attenuation between 10 K and 400 K in Sm 2 O 3 P 2 O 5 glasses is characterized by the presence of very broad peaks, due to thermally activated relaxations of structural defects, typical of amorphous materials. A study of these anomalies reveals that the addition of Sm 2 O 3 to P 2 O 5 has little influence
CARINI, Giuseppe +7 more
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Elastic and Anelastic Behavior of Materials in Small Dimensions
MRS Bulletin, 2002AbstractUnder certain circumstances, decreasing the dimensions of a material may lead to elastic or anelastic properties that diverge from bulk behavior. A distinction is made between elastic deformation, for which bond rearrangements are not required, and anelastic behavior, which involves reversible deformation due to defect motion.
Shefford P. Baker +2 more
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Elastic and Anelastic Behavior of Ion-Implanted Silicon
Applied Physics Letters, 1972Ion-implantation damage has been studied in thin reeds of silicon by resonant-frequency and internal-friction measurements. For a dose of 1016/cm2 of 28Si+, the principal effects are the appearance of an internal-friction peak and a decrease in the flexural vibration frequencies. The amorphous surface layer produced by implantation is deduced to have a
S. I. Tan, B. S. Berry, B. L. Crowder
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Elasticity and anelasticity: continuous viewpoint*
1999Abstract The elastic behaviour of a material is characterized anthropomorphically by stating that it ‘remembers’ only one of its previous states, namely the natural, unstressed and unstrained state. Whether such a state had actually been occupied in the past or not, or whether it is a mere abstract notion which helps one to give an ...
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High-temperature anelasticity and elasticity of mantle peridotite
Physics of the Earth and Planetary Interiors, 1979Abstract An apparatus has been devised which allows precise creep and relaxation measurements to be made on minerals and rocks at temperatures up to 1600°C and at very low deviatoric stresses (1 The reaction of the sample to a step-like increase in stress is called its “creep function”. It is shown that the creep function contains all the necessary
H. Berckhemer, F. Auer, J. Drisler
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Measurement of elastic and anelastic properties of nanocrystalline metals
Nanostructured Materials, 1999Abstract Due to their high content in nanocrystalline materials, the grain boundaries are expected to contribute significantly to the elastic and anelastic properties of the bulk material. Thus nanocrystalline materials lend themselves to the study of grain boundary contributions to absorption and dispersion of ultrasonic waves.
M.J. Lang +5 more
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Elasticity and anelasticity: discrete viewpoint
1999Abstract The purpose of this chapter is to justify theoretically the somewhat formal contents of Chapter 3 on the basis of microscopic considerations. There is, of course, no methodological obligation to do so as the success of a phenomenological theory is determined by its efficiency in macroscopic (which, for many of us, means ...
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Physics of the Earth and Planetary Interiors, 1985
Abstract With the aim of a simultaneous interpretation of elastic, anelastic and electric in situ data from the asthenosphere a comprehensive set of numerical models is developed for partial melt in different geometrical configurations. For the elastic and anelastic modulus use is made throughout of the melt squirt mechanism.
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Abstract With the aim of a simultaneous interpretation of elastic, anelastic and electric in situ data from the asthenosphere a comprehensive set of numerical models is developed for partial melt in different geometrical configurations. For the elastic and anelastic modulus use is made throughout of the melt squirt mechanism.
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Elasticity and anelasticity of oxide glasses
2007The current understanding of sound properties in glasses is reviewed and compared to that in crystals. Sound damping in oxide glasses is controlled mainly by three processes which in increasing order of the frequency at which they dominate are: the thermal relaxation of defects, relaxation via anharmonic interactions with the thermal bath, and ...
Courtens, Eric +3 more
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