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Modeling of asphalt mixtures

dc.contributor.advisorŠejnoha Michal
dc.contributor.authorValenta Richard
dc.date.accessioned2011-12-15T11:13:36Z
dc.date.available2011-12-15T11:13:36Z
dc.date.issued2011-12-15
dc.date.submitted2011-12-15 12:12:57.0
dc.identifier43071896505
dc.identifier.urihttp://hdl.handle.net/10467/8002
dc.description.abstractA well established framework of an uncoupled hierarchical modeling approach is adopted here for the prediction of macroscopic material parameters of the generalized Leonov constitutive model intended for the analysis of flexible pavements at both moderate and elevated temperature regimes. To that end, a recently introduced concept of a statistically equivalent periodic unit cell is addressed to reflect a real microstructure of mastic asphalt mixtures. While mastic properties are derived from an extensive experimental program, the macroscopic properties of mastic asphalt mixtures are fitted to virtual numerical experiments performed on the basis of first order homogenization scheme. To enhance feasibility of the solution of the underlying nonlinear problem a two-step homogenization procedure is proposed. Here, the effective material properties are first found for a mortar phase, a composite consisting of a mastic matrix and a fraction of small aggregates. These properties are then introduced in place of the matrix in actual unit cells to give estimates of the model parameters on macroscale. To avoid intensive mesoscopic simulations the Mori-Tanaka averaging scheme is introduced as a potential candidate for performing the homogenization step in the framework of fully coupled multiscale analysis. Being aware of various limitations of classical micromechanical models the Mori-Tanaka method is enhanced to take into account, at least to some extent, increasing compliance of the matrix phase associated with highly localized deformation manifested here through a network of shear bands.
dc.description.abstractA well established framework of an uncoupled hierarchical modeling approach is adopted here for the prediction of macroscopic material parameters of the generalized Leonov constitutive model intended for the analysis of flexible pavements at both moderate and elevated temperature regimes. To that end, a recently introduced concept of a statistically equivalent periodic unit cell is addressed to reflect a real microstructure of mastic asphalt mixtures. While mastic properties are derived from an extensive experimental program, the macroscopic properties of mastic asphalt mixtures are fitted to virtual numerical experiments performed on the basis of first order homogenization scheme. To enhance feasibility of the solution of the underlying nonlinear problem a two-step homogenization procedure is proposed. Here, the effective material properties are first found for a mortar phase, a composite consisting of a mastic matrix and a fraction of small aggregates. These properties are then introduced in place of the matrix in actual unit cells to give estimates of the model parameters on macroscale. To avoid intensive mesoscopic simulations the Mori-Tanaka averaging scheme is introduced as a potential candidate for performing the homogenization step in the framework of fully coupled multiscale analysis. Being aware of various limitations of classical micromechanical models the Mori-Tanaka method is enhanced to take into account, at least to some extent, increasing compliance of the matrix phase associated with highly localized deformation manifested here through a network of shear bands.eng
dc.language.isoeng
dc.publisherČeské vysoké učení technické v Praze. Vypočetní a informační centrum.cze
dc.rightsA university thesis is a work protected by the Copyright Act. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one’s own expense. The use of thesis should be in compliance with the Copyright Act http://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf and the citation ethics http://www.cvut.cz/sites/default/files/content/d1dc93cd-5894-4521-b799-c7e715d3c59e/cs/20160901-metodicky-pokyn-c-12009-o-dodrzovani-etickych-principu-pri-priprave-vysokoskolskych.pdf.eng
dc.rightsVysokoškolská závěrečná práce je dílo chráněné autorským zákonem. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem http://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf a citační etikou http://www.cvut.cz/sites/default/files/content/d1dc93cd-5894-4521-b799-c7e715d3c59e/cs/20160901-metodicky-pokyn-c-12009-o-dodrzovani-etickych-principu-pri-priprave-vysokoskolskych.pdf.cze
dc.subjectMastic Asphalt mixtures, multiscale analysis, binary image, periodic unit cell, homogenization, generalized Leonov model, Mori-Tanaka methodcze
dc.titleModeling of asphalt mixtures
dc.titleModeling of asphalt mixtureseng
dc.typedisertační prácecze
dc.date.updated2011-12-15T11:13:36Z
dc.date.accepted2011-04-06 00:00:00.0
dc.contributor.refereeZeman Jan
dc.description.departmentkatedra mechanikycze
theses.degree.namePh.D.cze
theses.degree.disciplineFyzikální a materiálové inženýrstvícze
theses.degree.grantorFakulta stavebnícze
theses.degree.programmeStavební inženýrstvícze
evskp.contactČVUTcze


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