A Comprehensive Study of Crack Growth in Asphalt Concrete Using Fracture Mechanics

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dc.contributor.advisorY. Richard Kim, Committee Chairen_US
dc.contributor.advisorA.A. Tayebali, Committee Memberen_US
dc.contributor.advisorF.G. Yuan, Committee Memberen_US
dc.contributor.advisorM.N. Guddati, Committee Memberen_US
dc.contributor.authorSeo, Youngguken_US
dc.date.accessioned2010-04-02T18:29:48Z
dc.date.available2010-04-02T18:29:48Z
dc.date.issued2003-10-29en_US
dc.degree.disciplineCivil Engineeringen_US
dc.degree.leveldissertationen_US
dc.degree.namePhDen_US
dc.description.abstractThis research presents findings from a comprehensive experimental/analytical study of crack growth in asphalt concrete using the theory of fracture mechanics. The primary objective of this study is to provide critical information that is complementary to the use of viscoelastoplastic continuum damage model (Chehab et al., 2002) in simulating crack growth by means of finite element analysis. To simulate opening mode fracture, uniaxial-monotonic and cyclic-tension tests were conducted on prismatic specimens with symmetric double notches. The full post-peak behavior with strain localization is well described by softening function and fracture energy using the cohesive crack model. Digital image correlation method (DIC), a non-contact, full-field, surface displacement/strain measurement technique, was utilized to investigate the characteristics of the fracture process zone (FPZ), a localized damage zone. Irrespective of the notch size and testing conditions, the FPZ was observed to be similar in size and shape for the mixture. In addition, it was found that the strain at the crack tip immediately before crack initiation is a decreasing function of strain rate. It is shown that crack growth rate in asphalt concrete can satisfactorily be predicted using a quasi-elastic approach, based on the linear elastic stress intensity factor criterion. Using a temperature-reduced crack speed concept, the crack growth rate of asphalt concrete was shown to be proportional to temperature. Finally, the time-temperature superposition principle was successfully applied to these crack growth rate laws to develop a single relationship (i.e., a crack growth rate master curve). This analysis was further implemented to investigate the specimen size effect in the crack growth rate prediction model.en_US
dc.identifier.otheretd-07222003-215426en_US
dc.identifier.urihttp://www.lib.ncsu.edu/resolver/1840.16/3409
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectDICen_US
dc.subjectFracture Energyen_US
dc.subjectParis lawen_US
dc.subjectFPZen_US
dc.subjectSoftening Curveen_US
dc.titleA Comprehensive Study of Crack Growth in Asphalt Concrete Using Fracture Mechanicsen_US

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