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On the mechanics of contact and reattachment in layered aerospace and ocular structures
Descriptive
TitleInfo
Title
On the mechanics of contact and reattachment in layered aerospace and ocular structures
Name
(type = personal)
NamePart
(type = family)
Ge
NamePart
(type = given)
Peinan
NamePart
(type = date)
1987-
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Peinan Ge
Role
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(authority = RULIB)
author
Name
(type = personal)
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Bottega
NamePart
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William J
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William J Bottega
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Advisory Committee
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chair
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Baruh
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Haim
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Haim Baruh
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Advisory Committee
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internal member
Name
(type = personal)
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(type = family)
Benaroya
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(type = given)
Haym
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Haym Benaroya
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Advisory Committee
Role
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(authority = RULIB)
internal member
Name
(type = personal)
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(type = family)
Fine
NamePart
(type = given)
Howard F
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Howard F Fine
Affiliation
Advisory Committee
Role
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outside member
Name
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NamePart
Rutgers University
Role
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(authority = RULIB)
degree grantor
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Graduate School - New Brunswick
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school
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Text
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theses
OriginInfo
DateCreated
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2014
DateOther
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(type = degree)
2014-10
CopyrightDate
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2014
Place
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xx
Language
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(type = code)
eng
Abstract
(type = abstract)
Contact and reattachment of two types of layered structures are examined. In the first part of the dissertation, a constrained patched structure subjected to uniform temperature change with edge damage is studied. Geometric nonlinearities and shear deformation are included in the mathematical model, and the effects of shear deformation are examined. The formulation is based on the calculus of variations with propagating boundaries, and yields the governing equations, boundary conditions, matching conditions and transversality condition. Results are compared with previously published results with transverse shear deformation neglected. The effects of shear deformation on the recently discovered instabilities referred to as 'sling-shot buckling' and 'buckle trapping' are demonstrated and discussed. The influence of the relative size of the detached region and of the difference between the material properties of the base plate and of the patch (in particular, the shear moduli) on the afforementioned thermo-mechanical instabilities are elucidated. In the second part, a representative mathematical model of the eye encircled by a scleral buckle in the vicinity of the equator is developed. The effects of the buckle on the mechanical behavior of the eye, and then on closing posterior retinal detachment are both studied. Both problems are formulated using variational methods. Closed form analytical solutions of the coupled differential equations are obtained. Results of numerical simulations are presented and critical phenomena are unveiled. The effects of material and geometric parameters (radius, width, thickness and Young’s modulus) of the scleral buckle, as well as of the ocular pressure, on the deformation of the eye are studied. Volume changes for each case are evaluated as well. It is seen that the radius of the buckle is the dominant parameter with regard to mechanical behavior of the eye. In the final major chapter, the effect of the scleral buckle on closure and reattachment of posterior retinal detachment is studied. It is seen that as the radius of the scleral buckle reduces, the distance between the detached segment of retina and the retinal pigment epithelium decreases, thus encouraging reattachment between the two surfaces. This, evidently, has ramifications with regard to treatment of posterior retinal detachment.
Subject
(authority = RUETD)
Topic
Mechanical and Aerospace Engineering
Subject
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Topic
Materials--Analysis
RelatedItem
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TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier
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ETD
Identifier
ETD_5798
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electronic resource
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application/pdf
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text/xml
Extent
1 online resource (xv, 176 p. : ill.)
Note
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Ph.D.
Note
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Includes bibliographical references
Note
(type = statement of responsibility)
by Peinan Ge
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TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier
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doi:10.7282/T3JS9NWX
Genre
(authority = ExL-Esploro)
ETD doctoral
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Rights
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The author owns the copyright to this work.
RightsHolder
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Name
FamilyName
Ge
GivenName
Peinan
Role
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Type
Permission or license
DateTime
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2014-08-27 00:51:09
AssociatedEntity
Name
PEINAN GE
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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ETD
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windows xp
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