{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/87295"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/87295","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Finite element analysis of multipass effects of vehicles on soil compaction","abstract":"A computer program based on the finite element procedure was modified to analyze the multipass effect of rubber-tired vehicles on soil compaction. The wheel-soil interaction was modeled as an axisymmetric problem by approximating the elliptical wheelsoil contact area with an equivalent circular area. A hyperbolic stress-strain relationship was used to model the nonlinear material characteristics of the soil. The boundary load conditions were based on contact area and contact pressure data for a standard tire. The finite element program developed was verified by conducting a linear elastic analysis of a circular flexible footing problem and comparing the results with closed form solution. The results of the finite element analysis agreed well with the closed form solution. The effects of soil type, wheel-soil contact area, and multiple wheel loading on soil compaction were analyzed. The results of the analyses provided information on soil displacement, stress distribution, and volumetric strain. Residual volumetric strain contours, developed after each loading and unloading cycle (simulating the passage of a wheel), showed zones of maximum compaction and the propagation of compaction zones as a function of the number of wheel loadings. A major portion (80% - 90%) of the total residual volumetric strain was found to occur during the first wheel pass. The rate of increase in volumetric strain dropped noticeably as the number of passes increased. As expected, results of the analysis show that for a given vehicle weight, the use of large tires minimizes the degree of compaction.","abstract_html":"A computer program based on the finite element procedure was modified to analyze the multipass effect of rubber-tired vehicles on soil compaction. The wheel-soil interaction was modeled as an axisymmetric problem by approximating the elliptical wheelsoil contact area with an equivalent circular area. A hyperbolic stress-strain relationship was used to model the nonlinear material characteristics of the soil. The boundary load conditions were based on contact area and contact pressure data for a standard tire. The finite element program developed was verified by conducting a linear elastic analysis of a circular flexible footing problem and comparing the results with closed form solution. The results of the finite element analysis agreed well with the closed form solution. The effects of soil type, wheel-soil contact area, and multiple wheel loading on soil compaction were analyzed. The results of the analyses provided information on soil displacement, stress distribution, and volumetric strain. Residual volumetric strain contours, developed after each loading and unloading cycle (simulating the passage of a wheel), showed zones of maximum compaction and the propagation of compaction zones as a function of the number of wheel loadings. A major portion (80% - 90%) of the total residual volumetric strain was found to occur during the first wheel pass. The rate of increase in volumetric strain dropped noticeably as the number of passes increased. As expected, results of the analysis show that for a given vehicle weight, the use of large tires minimizes the degree of compaction.","abstract_has_math":false,"creators":["Pollock, David Garnet"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Agricultural Engineering","degree_department":"Agricultural Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1984,"date_issued":"1984","date_published":"1984","updated_at":"2026-07-22T22:20:27Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/87295","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Agricultural Engineering"]},{"key":"dc:creator","label":"Author","values":["Pollock, David Garnet"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-01-31T18:56:01Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2019-01-31T18:56:01Z"]},{"key":"dc:date.issued","label":"Date","values":["1984"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agricultural Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"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.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/87295"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A computer program based on the finite element procedure was modified to analyze the multipass effect of rubber-tired vehicles on soil compaction. The wheel-soil interaction was modeled as an axisymmetric problem by approximating the elliptical wheelsoil contact area with an equivalent circular area. A hyperbolic stress-strain relationship was used to model the nonlinear material characteristics of the soil. The boundary load conditions were based on contact area and contact pressure data for a standard tire. The finite element program developed was verified by conducting a linear elastic analysis of a circular flexible footing problem and comparing the results with closed form solution. The results of the finite element analysis agreed well with the closed form solution. The effects of soil type, wheel-soil contact area, and multiple wheel loading on soil compaction were analyzed. The results of the analyses provided information on soil displacement, stress distribution, and volumetric strain. Residual volumetric strain contours, developed after each loading and unloading cycle (simulating the passage of a wheel), showed zones of maximum compaction and the propagation of compaction zones as a function of the number of wheel loadings. A major portion (80% - 90%) of the total residual volumetric strain was found to occur during the first wheel pass. The rate of increase in volumetric strain dropped noticeably as the number of passes increased. As expected, results of the analysis show that for a given vehicle weight, the use of large tires minimizes the degree of compaction."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Finite element analysis of multipass effects of vehicles on soil compaction"]}]}],"canonical_facts":{"dc:contributor.department":["Agricultural Engineering"],"dc:creator":["Pollock, David Garnet"],"dc:date.accessioned":["2019-01-31T18:56:01Z"],"dc:date.available":["2019-01-31T18:56:01Z"],"dc:date.issued":["1984"],"dc:description.abstract":["A computer program based on the finite element procedure was modified to analyze the multipass effect of rubber-tired vehicles on soil compaction. The wheel-soil interaction was modeled as an axisymmetric problem by approximating the elliptical wheelsoil contact area with an equivalent circular area. A hyperbolic stress-strain relationship was used to model the nonlinear material characteristics of the soil. The boundary load conditions were based on contact area and contact pressure data for a standard tire. The finite element program developed was verified by conducting a linear elastic analysis of a circular flexible footing problem and comparing the results with closed form solution. The results of the finite element analysis agreed well with the closed form solution. The effects of soil type, wheel-soil contact area, and multiple wheel loading on soil compaction were analyzed. The results of the analyses provided information on soil displacement, stress distribution, and volumetric strain. Residual volumetric strain contours, developed after each loading and unloading cycle (simulating the passage of a wheel), showed zones of maximum compaction and the propagation of compaction zones as a function of the number of wheel loadings. A major portion (80% - 90%) of the total residual volumetric strain was found to occur during the first wheel pass. The rate of increase in volumetric strain dropped noticeably as the number of passes increased. As expected, results of the analysis show that for a given vehicle weight, the use of large tires minimizes the degree of compaction."],"dc:description.degree":["Master of Science"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/87295"],"dc:language.iso":["en_US"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Finite element analysis of multipass effects of vehicles on soil compaction"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Agricultural Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:27Z"}