Theses and Dissertations

Date of Award

5-2017

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Advisor

Dr. Constantine Tarawneh

Second Advisor

Dr. Robert Jones

Third Advisor

Dr. Aaron Greenwood

Abstract

The Semi-Circular Bending (SCB) test was modeled using the Discrete Element Method (DEM) implemented in numerical software Particle Flow Code (PFC). The fracture analysis of the SCB was studied using two mixtures gradation, Superpave and Coarse Matrix High Binder. The aggregate phase in the model was achieved by using two-dimensional aggregate images with different angularity indexes. The study of the variability of the SCB extends to the random generation of aggregate particles and air voids in the model, in addition to changing the properties at the interface between the aggregate and mastic phases. Results indicate the strong influence of the location of aggregates and air voids in the crack initiation and propagation. Moreover, the interface properties have a significant effect on the performance of asphalt mixtures. The SCB implemented in DEM can be considered as a repeatable cracking test based on the coefficient variation.

Comments

Copyright 2017 David Saul Renteria. All Rights Reserved.

https://www.proquest.com/dissertations-theses/discrete-element-analysis-scb-variability-asphalt/docview/1938712709/se-2?accountid=7119

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