dc.contributor.author	Peng, Bo	en
dc.contributor.committeechair	Wang, Linbing	en
dc.contributor.committeemember	Abbas, Montasir M.	en
dc.contributor.committeemember	Druta, Cristian	en
dc.contributor.department	Civil and Environmental Engineering	en
dc.date.accessioned	2014-08-21T08:00:23Z	en
dc.date.available	2014-08-21T08:00:23Z	en
dc.date.issued	2014-08-20	en
dc.description.abstract	Pavement is usually composed of aggregate, asphalt binder, and air voids; rigid pavement is built with hydraulic cement concrete; reinforced pavement contains steel. With these wide ranges of materials, different mechanical behaviors need to be defined in the pavement simulation. But so far, there is no research providing a comprehensive introduction and comparison between various contact models. This paper will give a detail exploration on the contact models that can be potentially used in DEM pavement simulation; in the analysis, it includes both a theoretical part, simulation results and computational time cost, which can reveal the fundamental mechanical behaviors for the models, and that can be a reference for researchers to choose a proper contact model. A new contact model—the power law viscoelastic contact model is implemented into software PFC 3D and is numerically verified. Unlike existing linear viscoelastic contact models, the approach presented in this thesis provides a detailed exploration of the contact model for thin film power-law creeping materials based on C.Y Chueng's work. This model is aimed at simulating the thin film asphalt layer between two aggregates, which is a common structure in asphalt mixtures. Experiments with specimens containing a thin film asphalt between two aggregates are employed to validate the new contact model.	en
dc.description.degree	Master of Science	en
dc.format.medium	ETD	en
dc.identifier.other	vt_gsexam:3453	en
dc.identifier.uri	http://hdl.handle.net/10919/50399	en
dc.publisher	Virginia Tech	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	Discrete element method	en
dc.subject	contact models	en
dc.subject	pavement simulation	en
dc.subject	power-low viscoelasticity	en
dc.title	Discrete Element Method (DEM) Contact Models Applied to Pavement Simulation	en
dc.type	Thesis	en
thesis.degree.discipline	Civil Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Discrete Element Method (DEM) Contact Models Applied to Pavement Simulation

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