Education
Doctor of Philosophy
Major: Civil Engineering - 2020
Dissertation Title: Advancement of Performance Test Methods of Bituminous Mixtures for Practical Implementation and Fundamental Understanding of Deformation and Fracture.
Research Advisor: Professor Yong-Rak Kim
Synopsis: The goal of this work was to improve the performance test methods of bituminous mixtures for their practical implementation and to develop an experimental-computation method aimed at a fundamental understanding of inelastic deformation and fracture in heterogeneous materials. An experimental-statistical approach was used to propose the improvement in practical performance testing of bituminous mixtures, while an inverse method based on optimization of local displacements (from digital image correlation and finite element method) was developed and used to obtain constitutive and fracture properties for elastic and viscoelastic materials.
Master's of Science
major: Civil Engineering
Minor: Mechanical Engineering - 2015
Thesis Title: Development of Semi-Circular Bending (SCB) Fracture Test for Bituminous Mixtures
Research Advisor: Professor Yong-Rak Kim
Synopsis: With an integrated experimental-statistical approach, this thesis investigated several critical SCB testing variables (i.e., the minimum recommended number of specimens, thickness, notch length, loading rate, and testing temperature) that are considered to have a significant effect on the overall fracture behavior of AC mixtures at intermediate service temperature conditions. The first part of this research focused on development of a reliable and repeatable SCB test for AC fracture characterization. Each testing variable of the five was investigated in turn with a typical range to estimate testing repeatability and practicality. At the end of this part a range of values recommended for SCB test was presented with the associated approximate COV. The second part of this study analyzed sensitivity of the SCB testing for difference in AC fixtures. In this part, a total of 14 AC mixtures were collected from 12 different field construction projects and were tested in the University of Nebraska’s Geomaterials Laboratory. Statistical analyses were then conducted to evaluate the repeatability and sensitivity of SCB test results.
Honor: Outstanding Master’s Thesis Award
Bachelor's Of Engineering
Major: Civil Engineering - 2014
Bachelor’s degree in civil engineering, from the college of engineering at the Kyung Hee University, Yongin-si, Gyeonggi-do, South Korea.