Persistent Link:
http://hdl.handle.net/10150/289577
Title:
Strength and stiffness of cellular foamed materials
Author:
Stone, Robert Michael, 1957-
Issue Date:
1997
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The use of cellular foams as a core material in light-weight optical and structural systems is of considerable interest. Research and development of these systems, however, have been hampered by the lack of material property data and uncertainty in the use of various suggested material characterizations and the associated constants of proportionality. ASTM standards were researched and, for the most part, found inadequate for testing cellular foam materials. The compression, tension and shear test methods developed are presented, as well as the results from physical tests on closed-cell SXATM foam specimens. Based on the test results, material characterizations are presented. Additionally, a parametric study was performed to investigate the behavior of open and closed-cell foams. Twenty-one (21) finite element models were built and seventy (70) analyses were performed to study the effects of cell geometry. Based on the FEA results, material characterizations are presented for the cubic array and the tetrakaidecahedron geometry. The FEA results are compared with the characterizations proposed by Gibson and Ashby and the test results. The validity of the scaling laws are confirmed; however, the proposed constants of proportionality overestimate the modulii a minimum of 50%. New constants are presented for both open-cell and closed-cell foams, as well as additional insights into the effects of cell shape on Poisson's ratio.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Applied Mechanics.; Engineering, Mechanical.; Engineering, Materials Science.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Civil Engineering and Engineering Mechanics
Degree Grantor:
University of Arizona
Advisor:
Richard, Ralph M.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleStrength and stiffness of cellular foamed materialsen_US
dc.creatorStone, Robert Michael, 1957-en_US
dc.contributor.authorStone, Robert Michael, 1957-en_US
dc.date.issued1997en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe use of cellular foams as a core material in light-weight optical and structural systems is of considerable interest. Research and development of these systems, however, have been hampered by the lack of material property data and uncertainty in the use of various suggested material characterizations and the associated constants of proportionality. ASTM standards were researched and, for the most part, found inadequate for testing cellular foam materials. The compression, tension and shear test methods developed are presented, as well as the results from physical tests on closed-cell SXATM foam specimens. Based on the test results, material characterizations are presented. Additionally, a parametric study was performed to investigate the behavior of open and closed-cell foams. Twenty-one (21) finite element models were built and seventy (70) analyses were performed to study the effects of cell geometry. Based on the FEA results, material characterizations are presented for the cubic array and the tetrakaidecahedron geometry. The FEA results are compared with the characterizations proposed by Gibson and Ashby and the test results. The validity of the scaling laws are confirmed; however, the proposed constants of proportionality overestimate the modulii a minimum of 50%. New constants are presented for both open-cell and closed-cell foams, as well as additional insights into the effects of cell shape on Poisson's ratio.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectApplied Mechanics.en_US
dc.subjectEngineering, Mechanical.en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRichard, Ralph M.en_US
dc.identifier.proquest9738959en_US
dc.identifier.bibrecord.b3747117xen_US
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