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001 AAI28667027
005 20210920103617.5
006 m o d
007 cr mn ---uuuuu
008 210920s2021 xx sbm 000 0 eng d
020 9798516089473
035 (MiAaPQ)AAI28667027
035 (MiAaPQ)umichrackham003509
040 MiAaPQ|beng|cMiAaPQ|dNTU
100 1 Nasser, Jalal
245 10 Nanostructured Interphases for Improved Interfacial
Adhesion in Structural and Ballistic Composites
264 0 |c2021
300 1 online resource (252 pages)
336 text|btxt|2rdacontent
337 computer|bc|2rdamedia
338 online resource|bcr|2rdacarrier
500 Source: Dissertations Abstracts International, Volume: 83-
01, Section: B
502 Thesis (Ph.D.)--University of Michigan, 2021
504 Includes bibliographical references
520 Fiber reinforced polymer matrix composites are a class of
structural materials that have gained high desirability in
a wide range of applications over the past few decades.
Due to their high specific strength and toughness, low
density, and design flexibility, fiber reinforced
composites have been preferred over traditional homogenous
materials, such as ceramics and metals, in structures and
components within the military, aerospace, automotive and
marine industries. The two constituents of these composite
materials are typically the rigid fibers and compliant
polymer resin, acting as reinforcement and matrix phases,
respectively. Yet unlike biological multicomponent
materials, such as bones, teeth, and bamboo, composites
are heterogeneous materials suffering from failure-prone,
discontinuous, and discrete fiber-matrix interfaces that
limit them from achieving their ideal theoretical
mechanical properties. Therefore, improving interfacial
adhesion and the load transfer mechanism between the fiber
and the matrix, while simultaneously maintaining the
structural integrity and light weight of composite
structures, is of great importance for the fabrication of
high performance composites and has been a long-lasting
challenge in the field of composite materials.This
dissertation is an effort to experimentally investigate
hierarchical and multifunctional fiber reinforced polymer
matrix composites with improved interfacial and
interlaminar adhesion through the integration of nanoscale
interphases and interlayers. As nanotechnology regularly
introduces new functional building blocks, many promising
and lightweight nano-reinforcement approaches are
continuously emerging and integrated into composite
materials. Here, the potential and role of chemical
interactions between nanomaterials (aramid nanofibers
(ANFs) and nanofibrils, zinc oxide nanowires (ZnO NWs),
laser induced graphene (LIG)) and fiber surfaces (aramid,
carbon, glass), along with their impact on the morphology
and adhesion quality of the resulting interphases and
interlayers are initially investigated. As a result, it is
demonstrated that well-adhered nanostructured interphases
and interlayers can be achieved in various fiber
reinforced composites through a number of chemical
processes, which include fibrilization, physical and
electrostatic adsorption, surface functionalization,
hydrothermal growth, and laser-induced graphitization, as
well as other mechanical approaches, such as transfer
printing and spray-coating. Further research is then
performed to thoroughly investigate and optimize the
effect of the introduced nanostructured interphases and
interlayers on the interfacial and interlaminar properties
of both fabrics and composites under quasi-static and
dynamic loading conditions, all while maintaining their
structural integrity, light weight, and flexibility.The
obtained results conclusively indicate that aramid
nanostructured interphases are capable of enhancing the
interfacial shear strength (IFSS) and interlaminar
properties of quasi-statically loaded aramid and glass
fiber reinforced composites, while also improving the
impact response and stab resistance of ballistic
protection aramid fabrics. Moreover, ceramic zinc oxide
interphases are studied using a novel experimental setup
and are shown to allow for the tailoring of composite
interfacial properties as a function of the applied strain
rate. Finally, ANF and LIG nanostructured interlayers are
demonstrated to suppress delamination and improve
interlaminar fracture toughness in both aramid and carbon
fiber reinforced polymer matrix composites. The
nanomaterial reinforced interlaminar regions exhibit
improved toughening mechanisms that increase energy
absorption, and thus delay catastrophic failure due to
delamination in composite structures. The research
presented in this dissertation provides a multitude of
scalable and efficient approaches for the grafting of
nanostructured interphases and interlayers capable of
yielding hierarchical and multifunctional fiber reinforced
polymer matrix composites with improved mechanical
performance and maintained light weight and flexibility
533 Electronic reproduction.|bAnn Arbor, Mich. :|cProQuest,
|d2021
538 Mode of access: World Wide Web
650 4 Materials science
650 4 Nanotechnology
650 4 Aerospace engineering
653 Fiber reinforced polymer matrix composites
653 Interphase design
653 Aramid nanofibers
653 Zinc oxide nanomaterials
653 Laser induced graphene
653 Delamination
655 7 Electronic books.|2local
690 0538
690 0794
690 0652
710 2 ProQuest Information and Learning Co
710 2 University of Michigan.|bAerospace Engineering
773 0 |tDissertations Abstracts International|g83-01B
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/
advanced?query=28667027|zclick for full text (PQDT)
912 圖書館PQDT110|b1110406
