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Mechanics of 3d Printed Fiber-Reinforced Composites.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Mechanics of 3d Printed Fiber-Reinforced Composites./
作者:	Kabir, S M Fijul.
面頁冊數:	1 online resource (221 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
標題:	Mechanical properties. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28484319click for full text (PQDT)
ISBN:	9798505573112

Mechanics of 3d Printed Fiber-Reinforced Composites.
Kabir, S M Fijul.

Mechanics of 3d Printed Fiber-Reinforced Composites. - 1 online resource (221 pages)

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2021.

Includes bibliographical references

Three-dimensional printing (3DP), also known as additive manufacturing, is an emerging advanced manufacturing technology that develops a complex 3D structure in layer-by-layer fashion with unlimited design flexibilities which is often beyond the capacity of traditional technologies. Recent development in material extrusion based 3DP includes incorporation of reinforcement (such as short and long fibers) in the monolithic polymeric system unlocking ample prospects to apply this technology for high-performance arenas such as aerospace, automobile, construction, defense and electronic. Literature reveals that fiber-reinforced 3DP being a very young technology lacks sufficient understanding of the materials and technology, the behavior and manipulation of resulting composites as well as its commercial prospects regarding high-performance composite applications. The present research plan was designed based on the gap in the literature including; (1) the characterization of materials and discovering the technological capabilities of the commercial fiber-reinforced 3D printer to disclose manufacturing secrets and tailor properties of resulting composites, (2) enhancing mechanical properties of fiber-reinforced 3D printed composites with unique architectures, and (3) assessment of performance analysis of an applied complex 3D printed composite part with respect to the part developed via existing fabrication technology. Characterization of printing materials included plastic and fiber filaments (fiber bundle pre-impregnated with polymer, can be referred as composite filaments). Thermal and microstructural analysis were conducted to discover the manufacturing secrets such as thermal behavior of fiber and plastic filaments, diameters of composite filaments, number of fibers in the composite filaments, diameter and density of the fiber, fiber volume fraction, and fiber-matrix distribution in the composite filaments that has direct practical implications in determining and tuning composites' properties and their applications. Enhancing mechanical properties included fabrication of composites with (1) sandwiched cellular structures (triangular, hexagonal, rectangular and solid) at varying fiber orientations (unidirectional, cross-lay and quasiisotropic), and (2) maximum fiber content at varying fiber orientations (unidirectional, cross-lay, angle-lay and quasi-isotropic). Previously unexplored mechanical properties such as impact (Drop-weight, Charpy and Izod) in addition to the most widely explored properties such as tensile and microstructures of the developed composites were investigated. Results showed (1) incorporation of cellular cells reduced the composite weight without compromising the performance involving material saving approach, and (2) composites with maximum fiber content showed significant improvement in mechanical performance. For both cases, impact strength of the printed composites exhibited up to 300% more impact strength (Drop-weight) and tensile strength was comparable when normalized by fiber areal density with respect to 3D orthogonal plain-woven composites manufactured by Vacuum Assisted Resin Transfer Molding (VARTM) technology. Finally, ring travelers for ring spinning machine were fabricated as an applied composite part. The fabrication of investigated travelers demonstrated that fiber-reinforced 3DP is a promising technology with myriad flexibilities regarding reinforcement pattern and material selection, although the performance of printed travelers was not at desired level due to poor surface finish and limitation of slicing software. However, larger travelers with modified design could be a promising piece to apply this technology more effectively. Cost competitiveness is an important aspect for the commercial application of fiber-reinforced 3D printing technology.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798505573112Subjects--Topical Terms:

3549505
Mechanical properties.
Index Terms--Genre/Form:

542853
Electronic books.

Mechanics of 3d Printed Fiber-Reinforced Composites.
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502 $a Thesis (Ph.D.)--North Carolina State University, 2021.
504 $a Includes bibliographical references
520 $a Three-dimensional printing (3DP), also known as additive manufacturing, is an emerging advanced manufacturing technology that develops a complex 3D structure in layer-by-layer fashion with unlimited design flexibilities which is often beyond the capacity of traditional technologies. Recent development in material extrusion based 3DP includes incorporation of reinforcement (such as short and long fibers) in the monolithic polymeric system unlocking ample prospects to apply this technology for high-performance arenas such as aerospace, automobile, construction, defense and electronic. Literature reveals that fiber-reinforced 3DP being a very young technology lacks sufficient understanding of the materials and technology, the behavior and manipulation of resulting composites as well as its commercial prospects regarding high-performance composite applications. The present research plan was designed based on the gap in the literature including; (1) the characterization of materials and discovering the technological capabilities of the commercial fiber-reinforced 3D printer to disclose manufacturing secrets and tailor properties of resulting composites, (2) enhancing mechanical properties of fiber-reinforced 3D printed composites with unique architectures, and (3) assessment of performance analysis of an applied complex 3D printed composite part with respect to the part developed via existing fabrication technology. Characterization of printing materials included plastic and fiber filaments (fiber bundle pre-impregnated with polymer, can be referred as composite filaments). Thermal and microstructural analysis were conducted to discover the manufacturing secrets such as thermal behavior of fiber and plastic filaments, diameters of composite filaments, number of fibers in the composite filaments, diameter and density of the fiber, fiber volume fraction, and fiber-matrix distribution in the composite filaments that has direct practical implications in determining and tuning composites' properties and their applications. Enhancing mechanical properties included fabrication of composites with (1) sandwiched cellular structures (triangular, hexagonal, rectangular and solid) at varying fiber orientations (unidirectional, cross-lay and quasiisotropic), and (2) maximum fiber content at varying fiber orientations (unidirectional, cross-lay, angle-lay and quasi-isotropic). Previously unexplored mechanical properties such as impact (Drop-weight, Charpy and Izod) in addition to the most widely explored properties such as tensile and microstructures of the developed composites were investigated. Results showed (1) incorporation of cellular cells reduced the composite weight without compromising the performance involving material saving approach, and (2) composites with maximum fiber content showed significant improvement in mechanical performance. For both cases, impact strength of the printed composites exhibited up to 300% more impact strength (Drop-weight) and tensile strength was comparable when normalized by fiber areal density with respect to 3D orthogonal plain-woven composites manufactured by Vacuum Assisted Resin Transfer Molding (VARTM) technology. Finally, ring travelers for ring spinning machine were fabricated as an applied composite part. The fabrication of investigated travelers demonstrated that fiber-reinforced 3DP is a promising technology with myriad flexibilities regarding reinforcement pattern and material selection, although the performance of printed travelers was not at desired level due to poor surface finish and limitation of slicing software. However, larger travelers with modified design could be a promising piece to apply this technology more effectively. Cost competitiveness is an important aspect for the commercial application of fiber-reinforced 3D printing technology.
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