{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/138037"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/138037","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Geometry-Dependent Fracture and Rebound of Particulate under Compressor-Relevant Impact Conditions","abstract":"Gas turbine engines, such as those used in aircraft, are vulnerable to damage when they ingest small solid particles like sand, dust, or volcanic ash. Once inside, these particles collide with engine blades at very high speeds, where they may bounce, stick, or break apart. Each of these outcomes affects how particles travel through the engine and, in turn, how they contribute to erosion, clogging, or loss of performance. Predicting this behavior is difficult because it depends not only on the speed and angle of impact, but also on the irregular shape of the particles and the ability of the metal surfaces to deform. Previous models have often assumed that particles are perfect spheres, which simplifies the problem but does not reflect real conditions. This dissertation uses advanced computer simulations to study these impacts in more detail, focusing on how particle shape influences both rebound and fracture. The research shows that particle geometry strongly affects how energy is transferred during impact, how fragments are created, and how they move afterward. New ways of describing particle shape were developed that simplify the problem without losing important physical details, and a new modeling framework was introduced that combines experiments with simulations to make predictions more accurate and broadly applicable. These advances provide engineers with better tools for forecasting when and how engines are likely to be damaged by ingested particles, ultimately helping improve the durability and reliability of engines operating in harsh environments.","abstract_html":"Gas turbine engines, such as those used in aircraft, are vulnerable to damage when they ingest small solid particles like sand, dust, or volcanic ash. Once inside, these particles collide with engine blades at very high speeds, where they may bounce, stick, or break apart. Each of these outcomes affects how particles travel through the engine and, in turn, how they contribute to erosion, clogging, or loss of performance. Predicting this behavior is difficult because it depends not only on the speed and angle of impact, but also on the irregular shape of the particles and the ability of the metal surfaces to deform. Previous models have often assumed that particles are perfect spheres, which simplifies the problem but does not reflect real conditions. This dissertation uses advanced computer simulations to study these impacts in more detail, focusing on how particle shape influences both rebound and fracture. The research shows that particle geometry strongly affects how energy is transferred during impact, how fragments are created, and how they move afterward. New ways of describing particle shape were developed that simplify the problem without losing important physical details, and a new modeling framework was introduced that combines experiments with simulations to make predictions more accurate and broadly applicable. These advances provide engineers with better tools for forecasting when and how engines are likely to be damaged by ingested particles, ultimately helping improve the durability and reliability of engines operating in harsh environments.","abstract_has_math":false,"creators":["Wilson, Jacob Oliver"],"institution":"Virginia Tech","degree_name":"Doctor of Philosophy","degree_level":"doctoral","degree_discipline":"Mechanical Engineering","degree_department":"Mechanical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Qiao, Rui"],"committee_members":["Lowe, Kevin T.","Son, Chang Min","Ng, Wing Fai"],"year":2025,"date_issued":"2025-10-06","date_published":"2025-10-06","updated_at":"2026-07-22T22:20:23Z","subjects":["non-spherical geometry","particle impact","particle fracture","ductile substrate","compressor erosion"],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:44747"],"render_values":[{"text":"vt_gsexam:44747","href":null,"code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/10919/138037","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Qiao, Rui"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Lowe, Kevin T.","Son, Chang Min","Ng, Wing Fai"]},{"key":"dc:contributor.department","label":"Department","values":["Mechanical Engineering"]},{"key":"dc:creator","label":"Author","values":["Wilson, Jacob Oliver"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-10-07T08:00:11Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-10-07T08:00:11Z"]},{"key":"dc:date.issued","label":"Date","values":["2025-10-06"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["non-spherical geometry","particle impact","particle fracture","ductile substrate","compressor erosion"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:44747"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10919/138037"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstractgeneral","label":"General Abstract","values":["Gas turbine engines, such as those used in aircraft, are vulnerable to damage when they ingest small solid particles like sand, dust, or volcanic ash. Once inside, these particles collide with engine blades at very high speeds, where they may bounce, stick, or break apart. Each of these outcomes affects how particles travel through the engine and, in turn, how they contribute to erosion, clogging, or loss of performance. Predicting this behavior is difficult because it depends not only on the speed and angle of impact, but also on the irregular shape of the particles and the ability of the metal surfaces to deform. Previous models have often assumed that particles are perfect spheres, which simplifies the problem but does not reflect real conditions. This dissertation uses advanced computer simulations to study these impacts in more detail, focusing on how particle shape influences both rebound and fracture. The research shows that particle geometry strongly affects how energy is transferred during impact, how fragments are created, and how they move afterward. New ways of describing particle shape were developed that simplify the problem without losing important physical details, and a new modeling framework was introduced that combines experiments with simulations to make predictions more accurate and broadly applicable. These advances provide engineers with better tools for forecasting when and how engines are likely to be damaged by ingested particles, ultimately helping improve the durability and reliability of engines operating in harsh environments."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Doctor of Philosophy"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Geometry-Dependent Fracture and Rebound of Particulate under Compressor-Relevant Impact Conditions"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Qiao, Rui"],"dc:contributor.committeemember":["Lowe, Kevin T.","Son, Chang Min","Ng, Wing Fai"],"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Wilson, Jacob Oliver"],"dc:date.accessioned":["2025-10-07T08:00:11Z"],"dc:date.available":["2025-10-07T08:00:11Z"],"dc:date.issued":["2025-10-06"],"dc:description.abstractgeneral":["Gas turbine engines, such as those used in aircraft, are vulnerable to damage when they ingest small solid particles like sand, dust, or volcanic ash. Once inside, these particles collide with engine blades at very high speeds, where they may bounce, stick, or break apart. Each of these outcomes affects how particles travel through the engine and, in turn, how they contribute to erosion, clogging, or loss of performance. Predicting this behavior is difficult because it depends not only on the speed and angle of impact, but also on the irregular shape of the particles and the ability of the metal surfaces to deform. Previous models have often assumed that particles are perfect spheres, which simplifies the problem but does not reflect real conditions. This dissertation uses advanced computer simulations to study these impacts in more detail, focusing on how particle shape influences both rebound and fracture. The research shows that particle geometry strongly affects how energy is transferred during impact, how fragments are created, and how they move afterward. New ways of describing particle shape were developed that simplify the problem without losing important physical details, and a new modeling framework was introduced that combines experiments with simulations to make predictions more accurate and broadly applicable. These advances provide engineers with better tools for forecasting when and how engines are likely to be damaged by ingested particles, ultimately helping improve the durability and reliability of engines operating in harsh environments."],"dc:description.degree":["Doctor of Philosophy"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:44747"],"dc:identifier.uri":["https://hdl.handle.net/10919/138037"],"dc:language.iso":["en"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["non-spherical geometry","particle impact","particle fracture","ductile substrate","compressor erosion"],"dc:title":["Geometry-Dependent Fracture and Rebound of Particulate under Compressor-Relevant Impact Conditions"],"dc:type":["Dissertation"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["doctoral"],"thesis:degree_name":["Doctor of Philosophy"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:23Z"}