{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/72196"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/72196","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites","abstract":"A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements.","abstract_html":"A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements.","abstract_has_math":false,"creators":["Rahman, Shahzad"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Pecknold, D.A.,"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-17T21:05:03Z","date_published":"2014-12-17T21:05:03Z","updated_at":"2026-07-22T22:26:06Z","subjects":["Applied Mechanics","Engineering, Civil","Engineering, Materials Science"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI9305661"],"render_values":[{"text":"(UMI)AAI9305661","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/72196","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Pecknold, D.A.,"]},{"key":"dc:creator","label":"Author","values":["Rahman, Shahzad"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-17T21:05:03Z","10000-01-01","1992"]},{"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":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Applied Mechanics","Engineering, Civil","Engineering, Materials Science"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/72196","(UMI)AAI9305661"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements.","The matrix material is characterized using nonlinear-elastic Ramberg-Osgood relations. Micromechanical failure criteria are used for determining various modes of failure, including compression kink-banding. The accuracy of the micromechanical model is demonstrated by comparing its predictions with results from other micromechanical models and experimental data. Examples are also presented for laminated structures; the results are in good agreement with analytical and experimental results available in the literature.","Made available in DSpace on 2014-12-17T21:05:03Z (GMT). No. of bitstreams: 1 9305661.pdf: 5971486 bytes, checksum: 8ad9b1605af87a67bfc0bb3bc3dae492 (MD5) Previous issue date: 1992","Embargo set by: Seth Robbins for item 72364 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","181 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1992."]},{"key":"dc:title","label":"Title","values":["Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites"]}]}],"canonical_facts":{"dc:contributor":["Pecknold, D.A.,"],"dc:creator":["Rahman, Shahzad"],"dc:date":["2014-12-17T21:05:03Z","10000-01-01","1992"],"dc:description":["A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements.","The matrix material is characterized using nonlinear-elastic Ramberg-Osgood relations. Micromechanical failure criteria are used for determining various modes of failure, including compression kink-banding. The accuracy of the micromechanical model is demonstrated by comparing its predictions with results from other micromechanical models and experimental data. 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