Ultrasonic wave propagation in random particulate composites and porous materials
碩士 === 逢甲大學 === 機械工程學所 === 90 === Wave propagations in an inhomogeneous medium (e.g., particles, voids, defects, inclusions) undergo multiple scattering which results in a frequency dependent velocity and attenuation of coherent waves. The aim of this study is to analyses multiple scattering of plan...
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2002
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ndltd-TW-090FCU054890162018-05-11T04:19:33Z http://ndltd.ncl.edu.tw/handle/p3d974 Ultrasonic wave propagation in random particulate composites and porous materials 超音波在粒子強化複材與多孔性材料之波傳研究 Sheng-Jien Lin 林聖傑 碩士 逢甲大學 機械工程學所 90 Wave propagations in an inhomogeneous medium (e.g., particles, voids, defects, inclusions) undergo multiple scattering which results in a frequency dependent velocity and attenuation of coherent waves. The aim of this study is to analyses multiple scattering of plane compressional and shear waves in a composite containing randomly distributed spherical inhomogeneous inclusions or voids in a homogeneous isotropic medium. To calculate the effective wavenumbers of ultrasonic waves propagating in three types of heterogeneous materials, i.e., the particulate composites, porous materials and composites with multilayered interphases, a generalized self-consistent multiple scattering model is used in this study. Numerical results for the effective phase velocity and attenuation of both P and SV waves are calculated for a wide range of frequencies and concentrations. The proposed dynamic generalized self-consistent model for composites recovers both well-known static effective moduli ( Hashin (1962); Christensen and Lo (1979); Huang and Rokhlin (1996) ) in the static limit and the results at higher frequencies and concentrations agree well with published experimental data (Kinra and Rousseau, (1987) ). Ruey-Bin Yang 楊瑞彬 2002 學位論文 ; thesis 79 zh-TW |
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碩士 === 逢甲大學 === 機械工程學所 === 90 === Wave propagations in an inhomogeneous medium (e.g., particles, voids, defects, inclusions) undergo multiple scattering which results in a frequency dependent velocity and attenuation of coherent waves. The aim of this study is to analyses multiple scattering of plane compressional and shear waves in a composite containing randomly distributed spherical inhomogeneous inclusions or voids in a homogeneous isotropic medium. To calculate the effective wavenumbers of ultrasonic waves propagating in three types of heterogeneous materials, i.e., the particulate composites, porous materials and composites with multilayered interphases, a generalized self-consistent multiple scattering model is used in this study. Numerical results for the effective phase velocity and attenuation of both P and SV waves are calculated for a wide range of frequencies and concentrations. The proposed dynamic generalized self-consistent model for composites recovers both well-known static effective moduli ( Hashin (1962); Christensen and Lo (1979); Huang and Rokhlin (1996) ) in the static limit and the results at higher frequencies and concentrations agree well with published experimental data (Kinra and Rousseau, (1987) ).
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Ruey-Bin Yang |
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Ruey-Bin Yang Sheng-Jien Lin 林聖傑 |
author |
Sheng-Jien Lin 林聖傑 |
spellingShingle |
Sheng-Jien Lin 林聖傑 Ultrasonic wave propagation in random particulate composites and porous materials |
author_sort |
Sheng-Jien Lin |
title |
Ultrasonic wave propagation in random particulate composites and porous materials |
title_short |
Ultrasonic wave propagation in random particulate composites and porous materials |
title_full |
Ultrasonic wave propagation in random particulate composites and porous materials |
title_fullStr |
Ultrasonic wave propagation in random particulate composites and porous materials |
title_full_unstemmed |
Ultrasonic wave propagation in random particulate composites and porous materials |
title_sort |
ultrasonic wave propagation in random particulate composites and porous materials |
publishDate |
2002 |
url |
http://ndltd.ncl.edu.tw/handle/p3d974 |
work_keys_str_mv |
AT shengjienlin ultrasonicwavepropagationinrandomparticulatecompositesandporousmaterials AT línshèngjié ultrasonicwavepropagationinrandomparticulatecompositesandporousmaterials AT shengjienlin chāoyīnbōzàilìziqiánghuàfùcáiyǔduōkǒngxìngcáiliàozhībōchuányánjiū AT línshèngjié chāoyīnbōzàilìziqiánghuàfùcáiyǔduōkǒngxìngcáiliàozhībōchuányánjiū |
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1718636030708416512 |