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Predicting failure behavior of polymeric and asphalt composites using damage models


Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/20793

Predicting failure behavior of polymeric and asphalt composites using damage models

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dc.contributor.author Vallejo, Meghan
dc.date.accessioned 2012-07-03T16:10:29Z
dc.date.available 2012-07-03T16:10:29Z
dc.date.issued 2012-07-03
dc.date.submitted May 2012
dc.identifier.uri http://hdl.handle.net/1928/20793
dc.description.abstract This study investigates the failure behavior of two types of composite materials using damage models within the framework of ABAQUS finite element software. The failure behavior of an IM7/977-2 carbon epoxy composite material subjected to a Mode I delamination is predicted using traction-separation and bulk material damage models that are based on disturbed state concept (DSC) principles. The models were validated by comparing the results to referenced laboratory testing performed on IM7/977-2 carbon epoxy composite. The damaged states associated with various stages of loading are presented in this study. This study also predicts the failure behavior of asphalt materials through the use of damage models using the principles of the DSC. Traction-separation crack response, damage initiation and damage evolution behavior are investigated by modeling pavement systems consisting of a hot mix asphalt (HMA) overlay above an existing HMA layer and subjected to an applied static wheel loading. Preexisting cracks located within the existing asphalt material are also considered. The extended finite element method (XFEM) was employed to model mesh-independent cracking. The finite element model was validated by comparing the results to indirect tensile laboratory testing and referenced direct tensile laboratory data-based results performed on asphalt samples. The validated model was then used to examine damage in a pavement system with and without preexisting cracks. en_US
dc.description.sponsorship NASA Experimental Project to Stimulate Competitive Research en_US
dc.language.iso en_US en_US
dc.subject Damage, failure, disturbed state concept, DSC, traction-separation, cohesive elements, polymeric, asphalt, fracture, cracking, Abaqus, extended finite element method, XFEM en_US
dc.subject.lcsh Polymeric composites--Fatigue--Computer simulation.
dc.subject.lcsh Composite materials--Delamination--Computer simulation.
dc.subject.lcsh Pavements, Asphalt--Cracking--Computer simulation.
dc.subject.lcsh Pavements--Overlays--Cracking--Computer simulation.
dc.subject.lcsh Finite element method.
dc.title Predicting failure behavior of polymeric and asphalt composites using damage models en_US
dc.type Thesis en_US
dc.description.degree Civil Engineering en_US
dc.description.level Masters en_US
dc.description.department University of New Mexico. Dept. of Civil Engineering en_US
dc.description.advisor Tarefder, Rafiqul
dc.description.committee-member Ng, Tang-Tat
dc.description.committee-member Maji, Arup

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