Director: Prof. Seung Tae CHOI

■ Affiliation: School of Mechanical Engineering, Chung-Ang University, Republic of Korea
■ Office: Building No. 310, Room No. 538
■ Phone: +82-2-820-5275
■ Research Fields: Solid Mechanics, Fracture Mechanics, Electroactive Polymer Sensors and Actuators

Education

■ 1995.02 B.S. in Mechanical Design and Precision Engineering, Chung-Ang University
■ 1997.02 M.S. in Mechanical Engineering, KAIST (Thesis Title: Analysis of Interfacial Circular-Arc Cracks in Transversely Isotropic Piezoelectric Media)
■ 2002.08 Ph. D. in Mechanical Engineering, KAIST (Thesis Title: Elastic Analysis of Defects and Cracks in Thin Films and Layered Structures)

RESEARCH EXPERIENCE

■ 2001.03 ~ 2001.08 Visiting Research Associate, Division of Engineering, Brown University (USA) (Research Theme: Interaction of three-dimensional misfit dislocations in epitaxial film/substrate systems, Advisor: Prof. L. B. Freund)
■ 2002.09 ~ 2005.01 Post-Doc., Department of Mechanical Engineering, KAIST (Research Theme: Energetics of misfit dislocation dipoles in epitaxial film/substrate systems, Vertical cracking phenomena in epitaxial film/substrate systems)
■ 2003.03 ~ 2004.03 Post-Doc., Division of Engineering, Brown University (USA) (Research Theme: Nanoscale field projection of atomistic decohesion and slip in crystalline solids, Dislocation nucleation and segregation under adhesive contact of a crystal with a stepped coating, Advisor: Prof. Kyung-Suk Kim)
■ 2005.02 ~ 2011.02 Senior Researcher, Micro Systems Lab, SAIT (Research Theme: Relaxor ferroelectric polymer actuators and biomimetic varifocal lens for micro imaging systems)
■ 2011.03 ~ 2016.02 Assistant/Associate Professor, School of Mech. Eng., Univ. of Ulsan
■ 2016.03 ~ 2020.02 Associate Professor, School of Mech. Eng., Chung-Ang Univ.
■ 2020.03 ~ Present Professor, School of Mech. Eng., Chung-Ang Univ.

HONORS AND AWARDS

■ 1997.04 Excellent Thesis Award, Department of Mechanical Engineering, KAIST (Title: Analysis of Interfacial Circular-Arc Cracks in Transversely Isotropic Piezoelectric Media)
■ 2001.02 7th Humantech Thesis Prize, Bronze Prize, Samsung Electronics Co., Ltd.
■ 2003.02 9th Humantech Thesis Prize, Bronze Prize, Samsung Electronics Co., Ltd.
■ 2003.03 ~ 2004.04 Postdoctoral Fellowship, Korea Science and Engineering Foundation
■ 2010.01 The Year-End Award of Year 2009, Silver Prize, Samsung Electronics Co., Ltd. (Title: Development of Wafer-Scale Varifocal Lens and Polymer Actuator Array)
■ 2016.12 KSME Fall Meeting, Excellent Paper Award (Title: Mixed-Mode Fracture of Grain Boundaries in Graphene)

Research Interest

Mechanics of materials has been developed in the framework of local field theories relying on continuum hypothesis, in which long-range interactions between singular points such as crack tips and dislocations are governed by constitutive laws of materials. On the other hand, in nano devices and systems regions of events, e.g., dislocation cores, surface steps, stacking faults, grain boundaries, become closer so that energetics of nanoscale processes is highly non-local and nonlinear. The discrete and quantum mechanical nature of nanoscale atomistic interactions has been effectively modeled with atomistic simulations, in which Newton’s laws of motion with interatomic potentials govern short-range interaction of atoms. Scale-bridging mechanics from atoms to continuum represents a hierarchical approach to multiscale modeling and analysis in which for better understanding of nanoscale phenomena information at each scale is systematically incorporated in a manner that transcends the single-scale description.
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