Ultrasonic wave propagation in thick, layered composites containing degraded interfaces
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/33585 |
| _version_ | 1826211301401034752 |
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| author | Small, Peter D. (Peter David) |
| author2 | James H. Williams and David V. Burke. |
| author_facet | James H. Williams and David V. Burke. Small, Peter D. (Peter David) |
| author_sort | Small, Peter D. (Peter David) |
| collection | MIT |
| description | Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005. |
| first_indexed | 2024-09-23T15:03:44Z |
| format | Thesis |
| id | mit-1721.1/33585 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:03:44Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/335852019-04-12T09:46:26Z Ultrasonic wave propagation in thick, layered composites containing degraded interfaces Small, Peter D. (Peter David) James H. Williams and David V. Burke. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Ocean Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Ocean Engineering. Mechanical Engineering. Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005. Includes bibliographical references. The ultrasonic wave propagation of thick, layered composites containing degraded bonds is investigated. A theoretical one-dimensional model of three attenuative viscoelastic layers containing two imperfect interfaces is introduced. Elastic material properties and measured 'values of ultrasonic phase velocity and attenuation are used to represent E-glass and vinyl ester resin fiber-reinforced plastic (FRP) laminate, syntactic foam, and resin putty materials in the model. The ultrasonic phase velocity in all three materials is shown to be essentially constant in the range of 1.0 to 5.0 megahertz (MHz). The attenuation in all three materials is constant or slightly increasing in the range 1.0 to 3.0 MHz. Numerical simulation of the model via the mass- spring-dashpot lattice model reveals the importance of the input signal shape, wave speed, and layer thickness on obtaining non-overlapping, distinct return signals in pulse-echo ultrasonic nondestructive evaluation. The effect of the interface contact quality on the reflection and transmission coefficients of degraded interfaces is observed in both the simulated and theoretical results. by Peter D. Small. S.M. Nav.E. 2006-07-31T15:14:49Z 2006-07-31T15:14:49Z 2005 2005 Thesis http://hdl.handle.net/1721.1/33585 63676884 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 94 p. 3589791 bytes 3593659 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Ocean Engineering. Mechanical Engineering. Small, Peter D. (Peter David) Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title | Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title_full | Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title_fullStr | Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title_full_unstemmed | Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title_short | Ultrasonic wave propagation in thick, layered composites containing degraded interfaces |
| title_sort | ultrasonic wave propagation in thick layered composites containing degraded interfaces |
| topic | Ocean Engineering. Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/33585 |
| work_keys_str_mv | AT smallpeterdpeterdavid ultrasonicwavepropagationinthicklayeredcompositescontainingdegradedinterfaces |