{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/132576"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/132576","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The effects of case mass to charge mass ratio on aluminum-based structural energetic materials","abstract":"High explosives used in warfighting are generally encased in a steel case. The steel shell not only provides structure to the weapon, but it also contributes significantly to the total damage by adding shrapnel to the blast. Steel is commonly used due to its low cost, high strength, and destructive fragments. However, steel cases can substantially reduce the energy released by the explosive into the environment by using a large amount of energy to break the steel into fragments and accelerate them to high speeds. Alternative case materials are being investigated to have a cased explosive that has similar or greater fragmentation damage while also contributing to the energy of the initial blast. Tests were conducted on three different aluminum based reactive materials and a steel baseline explore differences in initial blast overpressure, total energy release, and fragmentation as the case mass to charge mass ratio changes. Cylindrical cases with high explosive charges were tested in a closed 4’ x 4’ blast chamber. Pressure sensors were used to measure both dynamic and static pressure for the first 90ms of each test. To isolate how much energy was released from the initial blast versus the secondary reactions from reactive fragments hitting the walls, tests for the materials were conducted where the fragments hit the steel chamber walls, or wood positioned along the shrapnel path.","abstract_html":"High explosives used in warfighting are generally encased in a steel case. The steel shell not only provides structure to the weapon, but it also contributes significantly to the total damage by adding shrapnel to the blast. Steel is commonly used due to its low cost, high strength, and destructive fragments. However, steel cases can substantially reduce the energy released by the explosive into the environment by using a large amount of energy to break the steel into fragments and accelerate them to high speeds. Alternative case materials are being investigated to have a cased explosive that has similar or greater fragmentation damage while also contributing to the energy of the initial blast. Tests were conducted on three different aluminum based reactive materials and a steel baseline explore differences in initial blast overpressure, total energy release, and fragmentation as the case mass to charge mass ratio changes. Cylindrical cases with high explosive charges were tested in a closed 4’ x 4’ blast chamber. Pressure sensors were used to measure both dynamic and static pressure for the first 90ms of each test. To isolate how much energy was released from the initial blast versus the secondary reactions from reactive fragments hitting the walls, tests for the materials were conducted where the fragments hit the steel chamber walls, or wood positioned along the shrapnel path.","abstract_has_math":false,"creators":["Son, Nicholas T"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Glumac, Nick G"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-12","date_published":"2025-12","updated_at":"2026-07-22T22:25:07Z","subjects":["Structural Reactive Material","Impact Induced Reaction","Fine Particle Reaction"],"languages":["en"],"rights":["Copyright 2025 Nicholas Son"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/132576","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Glumac, Nick G"]},{"key":"dc:creator","label":"Author","values":["Son, Nicholas T"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-12","2025-12-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical 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 Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Structural Reactive Material","Impact Induced Reaction","Fine Particle Reaction"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Nicholas Son"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/132576"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["High explosives used in warfighting are generally encased in a steel case. The steel shell not only provides structure to the weapon, but it also contributes significantly to the total damage by adding shrapnel to the blast. Steel is commonly used due to its low cost, high strength, and destructive fragments. However, steel cases can substantially reduce the energy released by the explosive into the environment by using a large amount of energy to break the steel into fragments and accelerate them to high speeds. Alternative case materials are being investigated to have a cased explosive that has similar or greater fragmentation damage while also contributing to the energy of the initial blast. Tests were conducted on three different aluminum based reactive materials and a steel baseline explore differences in initial blast overpressure, total energy release, and fragmentation as the case mass to charge mass ratio changes. Cylindrical cases with high explosive charges were tested in a closed 4’ x 4’ blast chamber. Pressure sensors were used to measure both dynamic and static pressure for the first 90ms of each test. To isolate how much energy was released from the initial blast versus the secondary reactions from reactive fragments hitting the walls, tests for the materials were conducted where the fragments hit the steel chamber walls, or wood positioned along the shrapnel path.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2026-02-19 without embargo terms","The student, Nicholas Son, accepted the attached license on 2025-12-04 at 14:00.","The student, Nicholas Son, submitted this Thesis for approval on 2025-12-04 at 14:03.","This Thesis was approved for publication on 2025-12-08 at 10:46.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23064 on 2026-02-19 at 18:29:32"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The effects of case mass to charge mass ratio on aluminum-based structural energetic materials"]}]}],"canonical_facts":{"dc:contributor":["Glumac, Nick G"],"dc:creator":["Son, Nicholas T"],"dc:date":["2025-12","2025-12-08"],"dc:description":["High explosives used in warfighting are generally encased in a steel case. The steel shell not only provides structure to the weapon, but it also contributes significantly to the total damage by adding shrapnel to the blast. Steel is commonly used due to its low cost, high strength, and destructive fragments. However, steel cases can substantially reduce the energy released by the explosive into the environment by using a large amount of energy to break the steel into fragments and accelerate them to high speeds. Alternative case materials are being investigated to have a cased explosive that has similar or greater fragmentation damage while also contributing to the energy of the initial blast. Tests were conducted on three different aluminum based reactive materials and a steel baseline explore differences in initial blast overpressure, total energy release, and fragmentation as the case mass to charge mass ratio changes. Cylindrical cases with high explosive charges were tested in a closed 4’ x 4’ blast chamber. Pressure sensors were used to measure both dynamic and static pressure for the first 90ms of each test. To isolate how much energy was released from the initial blast versus the secondary reactions from reactive fragments hitting the walls, tests for the materials were conducted where the fragments hit the steel chamber walls, or wood positioned along the shrapnel path.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2026-02-19 without embargo terms","The student, Nicholas Son, accepted the attached license on 2025-12-04 at 14:00.","The student, Nicholas Son, submitted this Thesis for approval on 2025-12-04 at 14:03.","This Thesis was approved for publication on 2025-12-08 at 10:46.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23064 on 2026-02-19 at 18:29:32"],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/132576"],"dc:language":["en"],"dc:rights":["Copyright 2025 Nicholas Son"],"dc:subject":["Structural Reactive Material","Impact Induced Reaction","Fine Particle Reaction"],"dc:title":["The effects of case mass to charge mass ratio on aluminum-based structural energetic materials"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:07Z"}