{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/19294"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/19294","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"A Refined Methodology for Calibrating Premium Connection Make-ups","abstract":"Digital Image Correlation is used to generate high-spatial-density full-field displacement
and strain data of a connection box outer diameter for use in the calibration of finite element
make-up models. Image acquisition and data processing techniques are discussed and best
practice recommendations are made. 3D-wedge models consisting of a twenty-degree sweep of
the connection geometry are generated from manufacturer supplied profiles. Deformation
plasticity material models are developed from identified minimum strength material coupons.
Axisymmetric and 3D meshing schemes are used to capture the geometric complexity, supply
enough resolution to represent seal performance, and provide a solution in an acceptable
timeframe. Several techniques for achieving good contact resolution are presented. The
mechanics of the full 3D connection makeup are decomposed into simple idealized
representations. Finite element boundary conditions are developed to adequately represent the
360-degree make-up mechanics in a wedge section. The wedge model is loaded to achieve a
torque-rotation coupling which satisfies the experimental make-up conditions. This model
displays a much improved ability to capture box outer diameter strain and displacement fields,
and thus better represents the mechanics of a connection make-up. A 3D inspired axisymmetric
pretension loading scheme is developed which enables the 3D-wedge seal conditions to be
replicated in a computationally efficient axisymmetric form for connection performance
evaluation. Seal metrics are developed and converged to evaluate connection sealing capabilities
in the power-tight configuration. Modeling error metrics are developed, and the final 3D-wedge
model is evaluated relative to the experimental DIC data.","abstract_html":"Digital Image Correlation is used to generate high-spatial-density full-field displacement<br />and strain data of a connection box outer diameter for use in the calibration of finite element<br />make-up models. Image acquisition and data processing techniques are discussed and best<br />practice recommendations are made. 3D-wedge models consisting of a twenty-degree sweep of<br />the connection geometry are generated from manufacturer supplied profiles. Deformation<br />plasticity material models are developed from identified minimum strength material coupons.<br />Axisymmetric and 3D meshing schemes are used to capture the geometric complexity, supply<br />enough resolution to represent seal performance, and provide a solution in an acceptable<br />timeframe. Several techniques for achieving good contact resolution are presented. The<br />mechanics of the full 3D connection makeup are decomposed into simple idealized<br />representations. Finite element boundary conditions are developed to adequately represent the<br />360-degree make-up mechanics in a wedge section. The wedge model is loaded to achieve a<br />torque-rotation coupling which satisfies the experimental make-up conditions. This model<br />displays a much improved ability to capture box outer diameter strain and displacement fields,<br />and thus better represents the mechanics of a connection make-up. A 3D inspired axisymmetric<br />pretension loading scheme is developed which enables the 3D-wedge seal conditions to be<br />replicated in a computationally efficient axisymmetric form for connection performance<br />evaluation. Seal metrics are developed and converged to evaluate connection sealing capabilities<br />in the power-tight configuration. Modeling error metrics are developed, and the final 3D-wedge<br />model is evaluated relative to the experimental DIC data.","abstract_has_math":false,"creators":["Ostergaard, Erik Barr"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Mechanical Engineering","degree_department":"Mechanical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["West, Robert L. Jr."],"committee_members":["Coe, David H.","Batra, Romesh C."],"year":2013,"date_issued":"2013-03-21","date_published":"2013-03-21","updated_at":"2026-07-22T22:20:18Z","subjects":["Oil Country Tubular Goods","Connection Make-up","Finite element method","Digital Image Correlation"],"languages":[],"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:431"],"render_values":[{"text":"vt_gsexam:431","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/19294","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["West, Robert L. 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and strain data of a connection box outer diameter for use in the calibration of finite element
make-up models. Image acquisition and data processing techniques are discussed and best
practice recommendations are made. 3D-wedge models consisting of a twenty-degree sweep of
the connection geometry are generated from manufacturer supplied profiles. Deformation
plasticity material models are developed from identified minimum strength material coupons.
Axisymmetric and 3D meshing schemes are used to capture the geometric complexity, supply
enough resolution to represent seal performance, and provide a solution in an acceptable
timeframe. Several techniques for achieving good contact resolution are presented. The
mechanics of the full 3D connection makeup are decomposed into simple idealized
representations. Finite element boundary conditions are developed to adequately represent the
360-degree make-up mechanics in a wedge section. The wedge model is loaded to achieve a
torque-rotation coupling which satisfies the experimental make-up conditions. This model
displays a much improved ability to capture box outer diameter strain and displacement fields,
and thus better represents the mechanics of a connection make-up. A 3D inspired axisymmetric
pretension loading scheme is developed which enables the 3D-wedge seal conditions to be
replicated in a computationally efficient axisymmetric form for connection performance
evaluation. Seal metrics are developed and converged to evaluate connection sealing capabilities
in the power-tight configuration. Modeling error metrics are developed, and the final 3D-wedge
model is evaluated relative to the experimental DIC data."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["A Refined Methodology for Calibrating Premium Connection Make-ups"]}]}],"canonical_facts":{"dc:contributor.committeechair":["West, Robert L. Jr."],"dc:contributor.committeemember":["Coe, David H.","Batra, Romesh C."],"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Ostergaard, Erik Barr"],"dc:date.accessioned":["2013-03-22T08:00:11Z"],"dc:date.available":["2013-03-22T08:00:11Z"],"dc:date.issued":["2013-03-21"],"dc:description.abstract":["Digital Image Correlation is used to generate high-spatial-density full-field displacement
and strain data of a connection box outer diameter for use in the calibration of finite element
make-up models. Image acquisition and data processing techniques are discussed and best
practice recommendations are made. 3D-wedge models consisting of a twenty-degree sweep of
the connection geometry are generated from manufacturer supplied profiles. Deformation
plasticity material models are developed from identified minimum strength material coupons.
Axisymmetric and 3D meshing schemes are used to capture the geometric complexity, supply
enough resolution to represent seal performance, and provide a solution in an acceptable
timeframe. Several techniques for achieving good contact resolution are presented. The
mechanics of the full 3D connection makeup are decomposed into simple idealized
representations. Finite element boundary conditions are developed to adequately represent the
360-degree make-up mechanics in a wedge section. The wedge model is loaded to achieve a
torque-rotation coupling which satisfies the experimental make-up conditions. This model
displays a much improved ability to capture box outer diameter strain and displacement fields,
and thus better represents the mechanics of a connection make-up. A 3D inspired axisymmetric
pretension loading scheme is developed which enables the 3D-wedge seal conditions to be
replicated in a computationally efficient axisymmetric form for connection performance
evaluation. Seal metrics are developed and converged to evaluate connection sealing capabilities
in the power-tight configuration. Modeling error metrics are developed, and the final 3D-wedge
model is evaluated relative to the experimental DIC data."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:431"],"dc:identifier.uri":["http://hdl.handle.net/10919/19294"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Oil Country Tubular Goods","Connection Make-up","Finite element method","Digital Image Correlation"],"dc:title":["A Refined Methodology for Calibrating Premium Connection Make-ups"],"dc:type":["Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:18Z"}