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Design of a Split Hopkinson Pressure Bar facility for dynamic material characterization
Descriptive
TitleInfo
Title
Design of a Split Hopkinson Pressure Bar facility for dynamic material characterization
Name
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Spaniol
NamePart
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Joseph R.
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Joseph R. Spaniol
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author
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Pelegri
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Assimina A
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Assimina A Pelegri
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Advisory Committee
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chair
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DeMauro
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Edward
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Edward DeMauro
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Advisory Committee
Role
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internal member
Name
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NamePart
(type = family)
Malhotra
NamePart
(type = given)
Rajiv
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Rajiv Malhotra
Affiliation
Advisory Committee
Role
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internal member
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Rutgers University
Role
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degree grantor
Name
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NamePart
School of Graduate Studies
Role
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school
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Text
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theses
OriginInfo
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2019
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2019-10
Language
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(type = text)
English
Abstract
(type = abstract)
It is important to know the mechanical response of materials over a full range of strain rates. In machining and stamping, or in ballistic type events such as bullet penetration, shell impacts, and explosive blasts, strain rates of 100 s-1 to 10,000 s-1 or even higher for hyper-velocity impacts, are achieved. A Split Hopkinson Pressure Bar facility is generally used to study the mechanical response of materials at these strain rates. The Split Hopkinson Pressure Bar produces precise data which can be used to study the dynamic response of materials. Over the last 70 years the Split Hopkinson Pressure Bar has been subject to many scrutinous studies which push the boundaries of materials it can test. In this thesis, the design of a compressive Split Hopkinson Pressure Bar facility is presented. The Split Hopkinson Pressure Bar is designed to obey the fundamental assumptions: one-dimensional and undispersed wave propagation as well as uniaxial loading of the specimen. Each subsystem of the compressive Split Hopkinson Pressure Bar is closely examined to outline its role in obeying these assumptions as well as its role in obtaining accurate data acquisition, then a design of each subsystem is presented. The presented facility improves accuracy, functionality, and ease of operation compared to previous work. Improvements in strain gage design increased the maximum attainable impact velocity from 40 m/s to at least 50 m/s. The Split Hopkinson Pressure Bar facility is thoroughly tested to verify the design. The dynamic response of aluminum 6061-T6511 is tested between strain rates of 1,000 s-1 and 6,300 s-1 to verify the accuracy of the facility. Testing showed that the response of 6061-T6511 is strain rate dependent which is consistent with literature. The flow stress of 6061-T6511 increases as strain rate increases from 350 MPa to 400 MPa at a rate of about 0.009 MPa-s. The dynamic response of polycarbonate is reported at strain rates between 1,000 s-1 and 7,000 s-1. The flow stress increases by about 8.2% over the range of strain rates. Super activated carbon and a super activated carbon composite is also studied using aluminum pressure bars, specifically designed for soft materials.
Subject
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Topic
Mechanical and Aerospace Engineering
Subject
(authority = local)
Topic
Split
Subject
(authority = LCSH)
Topic
Testing-machines
Subject
(authority = LCSH)
Topic
Materials -- Fatigue -- Testing
RelatedItem
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Title
Rutgers University Electronic Theses and Dissertations
Identifier
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Identifier
ETD_10366
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application/pdf
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text/xml
Extent
1 online resource (xi, 79 pages) : illustrations
Note
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M.S.
Note
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Includes bibliographical references
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School of Graduate Studies Electronic Theses and Dissertations
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rucore10001600001
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(displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier
(type = doi)
doi:10.7282/t3-gydh-h723
Genre
(authority = ExL-Esploro)
ETD graduate
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Rights
RightsDeclaration
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The author owns the copyright to this work.
RightsHolder
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Name
FamilyName
Spaniol
GivenName
Joseph
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime
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2019-09-29 14:14:57
AssociatedEntity
Name
Joseph Spaniol
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
Type
License
Name
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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windows xp
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2019-09-29T13:12:15
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2019-09-29T13:12:15
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