{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88422"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88422","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Characteristics and modeling of the fracture properties of polymer-silica microparticulate composites via macroscopic scratch tests","abstract":"The advantages of multi-phase materials are exploited in many industries, such as reinforced concrete in bridge construction, heterogeneous geological materials in petroleum engineering, advanced carbon fiber composites in aerospace engineering, and novel corrosion resistant coatings in the automotive industry. Although it is well known that the addition of inclusions can lead to improved multi-phase material properties, the characterization and prediction of these material properties is of current research interest. In this thesis, we evaluate the effect of spherical inclusion content on the material properties of polymer-silica microcomposites, both experimentally and theoretically. A wax mixture with spherical glass bead inclusions is developed as a model material. The hardness and fracture toughness of composites containing 0%, 5%, 10%, and 20% spherical glass bead inclusions by volume are analyzed using a built-in- house macroscopic scratch test device. The elastic modulus and compressive strength are obtained from a series of compression tests. Scanning electron microscopy is employed as an independent means to corroborate the morphology of the specimens. Several types of spherical glass beads with mean inclusion sizes of 20 μm and 200 μm are used in this study, and the effect of using a coating agent is investigated. We find that the compressive strength, elastic modulus, fracture toughness, and scratch hardness tend to increase with inclusion content. The composites containing coated glass beads exhibit superior properties in certain cases. Next, a rigorous linear elastic homogenization technique is derived to account for the observed change in elastic modulus and fracture toughness with inclusion content. The predictions developed are in strong agreement with the experimental data, creating a powerful tool for estimating the material properties of polymer-silica microcomposites. The generality of our theoretical framework makes it applicable to the study and prediction of elastic properties and fracture resistance in advanced composites.","abstract_html":"The advantages of multi-phase materials are exploited in many industries, such as reinforced concrete in bridge construction, heterogeneous geological materials in petroleum engineering, advanced carbon fiber composites in aerospace engineering, and novel corrosion resistant coatings in the automotive industry. Although it is well known that the addition of inclusions can lead to improved multi-phase material properties, the characterization and prediction of these material properties is of current research interest. In this thesis, we evaluate the effect of spherical inclusion content on the material properties of polymer-silica microcomposites, both experimentally and theoretically. A wax mixture with spherical glass bead inclusions is developed as a model material. The hardness and fracture toughness of composites containing 0%, 5%, 10%, and 20% spherical glass bead inclusions by volume are analyzed using a built-in- house macroscopic scratch test device. The elastic modulus and compressive strength are obtained from a series of compression tests. Scanning electron microscopy is employed as an independent means to corroborate the morphology of the specimens. Several types of spherical glass beads with mean inclusion sizes of 20 μm and 200 μm are used in this study, and the effect of using a coating agent is investigated. We find that the compressive strength, elastic modulus, fracture toughness, and scratch hardness tend to increase with inclusion content. The composites containing coated glass beads exhibit superior properties in certain cases. Next, a rigorous linear elastic homogenization technique is derived to account for the observed change in elastic modulus and fracture toughness with inclusion content. The predictions developed are in strong agreement with the experimental data, creating a powerful tool for estimating the material properties of polymer-silica microcomposites. The generality of our theoretical framework makes it applicable to the study and prediction of elastic properties and fracture resistance in advanced composites.","abstract_has_math":false,"creators":["Bouche, Gregory Alexander"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-11-17T21:22:03Z","date_published":"2015-11-17T21:22:03Z","updated_at":"2026-07-22T22:26:32Z","subjects":["multi-phase composite","scratch test","fracture toughness","linear homogenization","polymer-silica","Mori Tanaka","compressive strength","scratch hardness","macro scratch test device","SUNLab Macroscopic Scratch Test Device","micromechanics model","spherical inclusions","fracture energy","Young's modulus","linear elastic fracture mechanics","glass bead","paraffin wax","coupling agent","inclusion content"],"languages":["en"],"rights":["Copyright 2015 Gregory Bouche"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88422","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Bouche, Gregory Alexander"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-11-17T21:22:03Z","2015-05","2015-04-28"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["multi-phase composite","scratch test","fracture toughness","linear homogenization","polymer-silica","Mori Tanaka","compressive strength","scratch hardness","macro scratch test device","SUNLab Macroscopic Scratch Test Device","micromechanics model","spherical inclusions","fracture energy","Young's modulus","linear elastic fracture mechanics","glass bead","paraffin wax","coupling agent","inclusion content"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Gregory Bouche"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88422"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The advantages of multi-phase materials are exploited in many industries, such as reinforced concrete in bridge construction, heterogeneous geological materials in petroleum engineering, advanced carbon fiber composites in aerospace engineering, and novel corrosion resistant coatings in the automotive industry. Although it is well known that the addition of inclusions can lead to improved multi-phase material properties, the characterization and prediction of these material properties is of current research interest. In this thesis, we evaluate the effect of spherical inclusion content on the material properties of polymer-silica microcomposites, both experimentally and theoretically. A wax mixture with spherical glass bead inclusions is developed as a model material. The hardness and fracture toughness of composites containing 0%, 5%, 10%, and 20% spherical glass bead inclusions by volume are analyzed using a built-in- house macroscopic scratch test device. The elastic modulus and compressive strength are obtained from a series of compression tests. Scanning electron microscopy is employed as an independent means to corroborate the morphology of the specimens. Several types of spherical glass beads with mean inclusion sizes of 20 μm and 200 μm are used in this study, and the effect of using a coating agent is investigated. We find that the compressive strength, elastic modulus, fracture toughness, and scratch hardness tend to increase with inclusion content. The composites containing coated glass beads exhibit superior properties in certain cases. Next, a rigorous linear elastic homogenization technique is derived to account for the observed change in elastic modulus and fracture toughness with inclusion content. The predictions developed are in strong agreement with the experimental data, creating a powerful tool for estimating the material properties of polymer-silica microcomposites. The generality of our theoretical framework makes it applicable to the study and prediction of elastic properties and fracture resistance in advanced composites.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-11-17 without embargo terms","The student, Gregory Bouche, accepted the attached license on 2015-04-28 at 11:32.","The student, Gregory Bouche, submitted this Thesis for approval on 2015-04-28 at 12:36.","This Thesis was approved for publication on 2015-04-28 at 16:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8149 on 2015-11-17 at 15:00:59","Made available in DSpace on 2015-11-17T21:22:03Z (GMT). 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Although it is well known that the addition of inclusions can lead to improved multi-phase material properties, the characterization and prediction of these material properties is of current research interest. In this thesis, we evaluate the effect of spherical inclusion content on the material properties of polymer-silica microcomposites, both experimentally and theoretically. A wax mixture with spherical glass bead inclusions is developed as a model material. The hardness and fracture toughness of composites containing 0%, 5%, 10%, and 20% spherical glass bead inclusions by volume are analyzed using a built-in- house macroscopic scratch test device. The elastic modulus and compressive strength are obtained from a series of compression tests. Scanning electron microscopy is employed as an independent means to corroborate the morphology of the specimens. Several types of spherical glass beads with mean inclusion sizes of 20 μm and 200 μm are used in this study, and the effect of using a coating agent is investigated. We find that the compressive strength, elastic modulus, fracture toughness, and scratch hardness tend to increase with inclusion content. The composites containing coated glass beads exhibit superior properties in certain cases. Next, a rigorous linear elastic homogenization technique is derived to account for the observed change in elastic modulus and fracture toughness with inclusion content. The predictions developed are in strong agreement with the experimental data, creating a powerful tool for estimating the material properties of polymer-silica microcomposites. The generality of our theoretical framework makes it applicable to the study and prediction of elastic properties and fracture resistance in advanced composites.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-11-17 without embargo terms","The student, Gregory Bouche, accepted the attached license on 2015-04-28 at 11:32.","The student, Gregory Bouche, submitted this Thesis for approval on 2015-04-28 at 12:36.","This Thesis was approved for publication on 2015-04-28 at 16:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8149 on 2015-11-17 at 15:00:59","Made available in DSpace on 2015-11-17T21:22:03Z (GMT). No. of bitstreams: 4 BOUCHE-THESIS-2015.pdf: 212327093 bytes, checksum: c7e9b66d48037078d565ca4babcdbbd7 (MD5) Bouche_Gregory.docx: 297487396 bytes, checksum: ed99369f07e055153399215310138d42 (MD5) Title Page.docx: 23065 bytes, checksum: 55281eb61c5c8614272ddc65c59368ab (MD5) LICENSE.txt: 4211 bytes, checksum: dec3e34e7fe2ca957928298023ff2d5e (MD5) Previous issue date: 2015-04-28","Embargo set by: Seth Robbins for item 89731 Lift date: 2017-11-17T21:22:17Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Open"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/88422"],"dc:language":["en"],"dc:rights":["Copyright 2015 Gregory Bouche"],"dc:subject":["multi-phase composite","scratch test","fracture toughness","linear homogenization","polymer-silica","Mori Tanaka","compressive strength","scratch hardness","macro scratch test device","SUNLab Macroscopic Scratch Test Device","micromechanics model","spherical inclusions","fracture energy","Young's modulus","linear elastic fracture mechanics","glass bead","paraffin wax","coupling agent","inclusion content"],"dc:title":["Characteristics and modeling of the fracture properties of polymer-silica microparticulate composites via macroscopic scratch tests"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:32Z"}