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oai:dspace.mit.edu:1721.1/1001112026-06-06T01:04:46Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023col_1721.1_131024

James H. Williams. Pharr, Vanea R. (Vanea Ryann) Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering 2015-12-03T20:54:06Z 2015-12-03T20:54:06Z 2014 2015 http://hdl.handle.net/1721.1/100111 929471363 Thesis: Nav. E., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2015. Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2015. Cataloged from PDF version of thesis. "June 2015." Includes bibliographical references (page 135). Nondestructive Evaluation (NDE) is a branch of applied science that is concerned with assessing the properties and serviceability of materials and structures without causing collateral damage or depreciation. This study presents a detailed analysis of advanced composite rods (comprised of two or more distinct axial sections of different materials) using theoretical ultrasonic NDE. In anticipation of the high elastic moduli of the rods (relative to many metals) along their longitudinal axes, a one-dimensional wave propagation analysis will be conducted. By analyzing the propagation of ultrasonic waves in nondispersive media and the corresponding reflections and transmissions at structural interfaces, assessments of interfacial debonding will be explored and the presence of anomalous materials can be demonstrated. The resulting graphical presentations will be compiled and should provide the basis for material characterizations and assessments of structural integrity throughout the rods. by Vanea R. Pharr. Nav.E. S.M. 135 pages eng Massachusetts Institute of Technology 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 Mechanical Engineering. Nondestructive evaluation of composite rods using ultrasonic wave propagation Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="93312060-dc92-4b4e-b412-67bea69cf938"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Nondestructive evaluation of composite rods using ultrasonic wave propagation</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2015</PublicationDate> <Authors> <Author> <DisplayName>Pharr, Vanea R. (Vanea Ryann)</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Mechanical Engineering.</Keyword> <Abstract>Nondestructive Evaluation (NDE) is a branch of applied science that is concerned with assessing the properties and serviceability of materials and structures without causing collateral damage or depreciation. This study presents a detailed analysis of advanced composite rods (comprised of two or more distinct axial sections of different materials) using theoretical ultrasonic NDE. In anticipation of the high elastic moduli of the rods (relative to many metals) along their longitudinal axes, a one-dimensional wave propagation analysis will be conducted. By analyzing the propagation of ultrasonic waves in nondispersive media and the corresponding reflections and transmissions at structural interfaces, assessments of interfacial debonding will be explored and the presence of anomalous materials can be demonstrated. The resulting graphical presentations will be compiled and should provide the basis for material characterizations and assessments of structural integrity throughout the rods.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>