Acoustic Elasticity
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate
Abstract This paper applies acoustic analysis of Sound Transmission Loss (STL) through infinite Functionally Graded (FG) thick plate employing Hyperbolic Shear Deformation Theory (HSDT). The procedure for applying a FG plate is followed by considering the material properties are changed continually based on power-law distribution of the materials in terms of
Lat. Am. j. solids struct.. Publicado em: 04/02/2019
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2. Estudo de mecanismos de deformação lenta da gipsita bandada da Chapada do Araripe em ensaios de fluência monitorados por emissão acústica / Study of slow deformation mechanisms of the banded gypsum rock of the Chapada do Araripe in creep tests monitored by acoustic emission
Experimental studies by several authors have shown some of the key deformation mechanisms in gypsum, such as plastic flow and pressure dissolution. Even so, there is still sparse knowledge about the mechanical behavior of natural gypsum rocks. Creep mechanisms of the banded gypsum rock of Santana Formation from the Chapada do Araripe (Santana Formation) in c
Publicado em: 2009
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3. Filtros acústicos em cristais fonônicos
In this work, we have studied the acoustic phonon wave propagation within the periodic and quasiperiodic superlattices of Fibonacci type. These structures are formed by phononic crystals, whose periodicity allows the raise of regions known as stop bands, which prevent the phonon propagation throughout the structure for specific frequency values. This p
Publicado em: 2009
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4. Efeito da temperatura sobre a medição de tensão por ondas Lcr em aços API 5L X70 / Temperature effect on stress measurement by Lcr waves in API 5L X70
O processo de medição de tensões mecânicas por ultra-som faz uso da teoria acustoelástica, que relaciona a variação na velocidade de propagação de ondas com as deformações no objeto sob análise. Ondas ultra-sônicas propagando-se em meios elásticos são fortemente influenciadas pelas condições ambientais. Além disso, os sistemas instrumentais
Publicado em: 2007
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5. Efeito de esforços vibracionais na estrutura do tecido vegetal
The present work aims to study the effects of cyclic loading on selected mechanical properties of vegetative tissues. Farm machinery operations involved in all agricultural processes since seedling up to harvesting, transportation, packaging and storage is here considered as a potential generators of vibrating loading. Experiments were carried out on specime
Publicado em: 2003
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6. MECHANISM, BEHAVIOR AND EVOLUTION OF CALLING IN FOUR NORTH AMERICAN TREEFROGS / Mecanismos de produção de som em anfíbios norte americanos: biomecânica, comportamento e evolução
Acoustic communication in frogs is an important model system for the study of behavioral evolution in vertebrates. This study aimed to extend the current model on the mechanism of calling in frogs in order to strengthen the bridge between behavioral and physiological knowledge in the field. The limits and tradeoffs of sound production by the passive larynx w
Publicado em: 2003
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7. Detection of abnormal aortic elastic properties in asymptomatic patients with Marfan syndrome by combined transoesophageal echocardiography and acoustic quantification.
OBJECTIVE: To evaluate the potential value of transoesophageal echocardiography combined with automated border detection and acoustic quantification for the assessment of elastic properties of the thoracic aorta in patients with Marfan syndrome. SUBJECTS: 16 patients with Marfan syndrome and 12 age matched normal controls. METHODS: Transoesophageal echocardi
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8. Aggregate sound velocities and acoustic Grüneisen parameter of iron up to 300 GPa and 1,200 K
Successful interpretation of available geophysical data requires experimental and theoretical information on the elasticity of solids under physical conditions of Earth's interior. Because iron is considered as major component in Earth's core, elastic properties of iron at high pressures and temperatures are very important for modeling its composition a
National Academy of Sciences.
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9. Characterization and Stability of Emulsion Gels Based on Acrylamide/Sodium Acryloyldimethyl Taurate Copolymer
Sepineo P 600, a concentrated dispersion of acrylamide/sodium acryloyldimethyl taurate copolymer in isohexadecane, has self-gelling and thickening properties and the ability to emulsify oily phases, which make it easy to use in the formulation of gels and o/w emulsion gels. In this paper, gels were prepared using a Sepineo P 600 concentration between the 0.5
Springer US.