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The mechanical engineering of Chung-Ang University

Laboratories

LABORATORY RESEARCH INTERESTS PROFESSOR
3D Digital Engineering Laboratory

Research topics studied in the 3D Digital Engineering Laboratory are related to the algorithms and applications that deal with three dimensional shapes and CAD data. The focus of our research is towards the engineering applications with the fundamental knowledge of three-dimensional geometry, related computational algorithms, and mechanical engineering background. Research projects currently being investigated are as below, 1. Markerless motion capture system and motion analysis for animals of small size using multiple cameras. 2. Accurate three-dimensional modeling of blood vessels including intima and adventitia for FSI(Fluid-Structure Interaction) analysis 3. Three-dimensional shape search method using various shape descripters such as ZMD(Zernike Moment descriptor), FD(Fourier Descriptor) and etc..

Choi, Young
Applied Fluid Mechanics Laboratory

The Applied Fluid Mechanics Laboratory (AFM Lab) is affilated with the School of Mechanical Engineering at Chung-Ang University. Harnessing basic & advanced fluid dynamics theories, we aim to develop various microfluidic systems applicable for both bio and energy. Regarding biological applications, we develop microfluidic biochips in which combination of mechanical, chemical, and topological stimuli is created to reveal cellular charateristics. Regarding energy applications, we aggressively perform research on microscale fuel cell to develop a high-efficient self-powered micro fuel cell chip system with osmosis-driven passive pump.

Park, Joong Yull
Biomechanics Laboratory

The research at Biomechanics laboratory is focused on human joint biomechanics. We explore mechanical movements and intra-articular joint forces to understand injury mechanism and to develop effective treatment methods. A few examples include anterior-cruciate tear in the knee and osteoarthritis which is mechanical wear and tear of joint surface. For this purposes we develop mechanical, mathematical and graphical techniques and tools. Our research utilizes the classical areas of multi-body dynamics simulation, three-dimensional motion analysis, computer vision, and medical image processing.

Koo, Seungbum
CFD Laboratory

Our research group is focused on the computational fluid dynamics (CFD) of heat and mass transfer. Our studies are motivated by biomechanics, particle/droplet behavior and firedynamics as follows - Research for hemodynamics in vasculars and arterivenous graft using patient clinical data. - Numerical investigation of particle transport/deposition considering particle size and human workload in an upper airway - Research for droplet collision/break model and development of fire suppression system using new spray nozzle shape. - Development of specific fire scenarios and evacuating model with fire simulations. - Investigation of the quality enhancement of performance based design and smoke control system in ultra hagh rise buildings. Ultimately, through convergence study among reserach topics, human metabolism and evacuation model have been developed in an extreme situation.

Ryou, Hong Sun
Computer Solid Mechanics and Design Laboratory

1) Finite element simulation of dynamic failure in structural steels under impact loading
2) Residual stress analysis
- Shot peening process, Welding process
3) Development of roll pass schedule design program
- Rod (and Bar) rolling, Deformed bar rolling, Section rolling

Lee, Youngseog
Energy and Spectral Radiation Research Laboratory

Our group investigates: a) flow and heat transfer characteristics in combustion system and b) radiation and IR characteristics. In detail, non-gray gas radiation, anisotropic scattering, and CFD & thermal modeling are studied. (including gas-particle interactions, and phase change (multiphase flow modeling, and energy systems). Some of our projects are supported from KAIST and ADD.

Kim, Tae Kuk
Functional Materials and Applied Mechanics Laboratory

Conventional solid mechanics is encountering difficulties to deal with physical phenomena at nanoscale, which does not rely on the continuum hypothesis. For example, nano-scale fracture, adhesion, and slip processes are typically characterised by non-local and nonlinear deformation of the process zone surrounded by a non-uniform field of long-range interaction. The discrete and quantum mechanical nature of atomic debonding in the process zone has been often modelled with molecular dynamics simulations. It is our new challenge to investigate and analyse physical phenomena at nanoscale, and to apply them to design and fabricate nano devices and systems. One of our major research topics is electroactive polymers (EAPs). EAPs have the ability to induce strains under electrical stimulation that are as high as two orders of magnitude greater than the movements possible with conventional ferroelectric ceramics. EAP materials can be easily manufactured into various shapes due to the ease in processing many polymeric materials, making them very versatile materials. One potential application for EAPs is that they can potentially be integrated into microelectromechanical systems (MEMS) to produce smart actuators. Also, EAPs have been utilized in artificial muscles. Their ability to emulate the operation of biological muscles with high fracture toughness, large actuation strain and inherent vibration damping draw the attention of scientists in this field. Furthermore, the lightness and flexibility of EAPs make it possible to utilize them as actuators and sensors in flexible macroelectronics.

Choi, Seung Tae
Heat Transfer Laboratory

Research Interests of Heat Transfer Lab are 1) Modeling and numerical analysis of heat transfer phenomena such as turbine blade film cooling and automotive cooling system 2). Numerical analysis of air conditionining system in high rise building. 3) Numerical analysis in 3-D tube bank. 4) Numerical analysis of colling in electronic device.

Choi, Young Ki
High Temperature Fracture and Mechanical Properties Research Laboratory

Students who have interest in mechanics of solids or materials engineering can meet variety of research opportunities in the HTF and MPR Lab. Main subject of the lab is mechanical behavior of metals at high temperature such as creep. Industrial subject in fossil power plants and energy plants are also actively studied in the lab. The lab is leading the research in RBI(risk based inspection) or RBM(risk based management). The detailed subjects are as follows: 1. High Temperature Fracture Mechanics - time dependent fracture mechanics (TDFM), life assessment of cracked component, creep crack growth(CCG), creep-fatigue crack growth(CFCG) modeling, Materials behavior of high temperature materials (9Cr, Ni-base superalloy, Alloy 617), small punch creep testing and simulation 2. Remaining Life Assessment of Plant Components - pipe system stress analysis (metal, non-metal), microstructure degradation, boiler-header, Y-piece, T-branch, HRSG application, heater/reformer tube life analysis (HP, KHR), failure analysis of high temperature components 3. RBI (Risk Based Inspection), RBM (Risk Based Engineering) - risk assessment & management of process plants, RBI for piping system of semiconductor fab, risk auditing and management of energy plants, plastic pipe integrity 4. Hydrogen Damage - electro-chemical hydrogen charging method, hydrogen concentration analysis, small punch test for hydrogen embrittlement study, failure mechanism of hydrogen damage.

Yoon, Kee Bong
Intelligent Control Systems & Optimization Laboratory

Intelligent Control Systems & Optimization Laboratory was established in 2008 with the ultimate goal of creating intelligence and autonomy in systems. Intelligent Control Systems & Optimization Researches are ubiquitous and are playing an increasing role in assisting researchers and scientists. Our in depth know-how extends to Complex Control Systems, Intelligent Optimization and Control, Swarm Intelligence, Coordination and Control of Multiple Robots, Systems Biology, Analysis and Control of Genetic Networks, System Design Engineering, etc. Graduate students, undergraduate students, and other engineers carry out research projects in the lab in active collaboration with personnel from other academic institutions, government and industrial laboratories.

Kim, Tae-Hyoung
Integrated Systems Design Laboratory

Our main research interests are in studying modern design approaches which can be applied to various complex engineering problems to enhance system performances. Design techniques includes integrated materials and products design, strategic product design, multidisciplinary design optimization, design of experiments, robust design, etc. The detailed research subjects include: 1. Multiscale strategic product design methodology for concept design of mid-sized passenger aircraft 2. Integrated design of sandwich panels and materials 3. Multifunctional Energetic Structural Materials Design and Analysis 4. Design and fabrication of Radial Contour Mode Resonator Biosensor 5. Interdisciplinary research in the next generation fossil power plants.

Choi, Hae-Jin
Laboratory for Functional Micro Surface Engineering

The primary goal of our lab is to pursue understanding of fundamental knowledge of Tribology and practical applications for industrial needs. The realm of researches encompasses micro surface texturing using laser technology for low friction, wear resistive surface treatments, development of composite metallic coatings for wear resistant surface, etc. Our lab has a number of testing and analysis facilities. For example, multi-purpose wear and friction testing machine, Optimol SRV, and micro friction measurement unit have been widely used for the purpose of various industrial and governmental projects. In addition, 3-dimensional surface scan equipment is also being actively used for investigating micro texturing and surface morphology of metals and polymers. Tribology is one of important interdisciplinary academic fields and its importance has been increasingly gained from both academic and industrial fields. Students after graduation can get a job in various fields related to automotive, electronics, research institutes, and so on.

Cho, Minhaeng
Laboratory of Modeling, Analysis, and eXperiment in Dynamics

The general research area of the Lab. of MAXiD is in the broad field of dynamics, vibrations, and applied mechanics. Specific problems being currently investigated include modeling smart materials and their applications such as the energy harvesting from vibratory environment. From the academic perspectives, the main research field belongs to the nonlinear dynamics, with a special focus on the analytical or semi-analytical approaches applied to the vibratory energy harvesters, railway vehicles, machine tools, and various sensors/actuators. The other area of research in this lab. involves the magnetorheological fluid, piezoelectric structures, electro-chemo-mechanical surface treatment, micro-patterning on lubricating surface, energy consumption

reduction in machine tools, etc.
Seok, Jongwon
Micro Materials & Manufacturing Laboratory

The main research topics are the Micro Welding, Electronic Packaging, Surface Mounting Technology and Renewable Energy(Solar Cell) as well. The characteristics of micro joints with various materials is evaluated using mechanical tests. Also, the long-term reliability is conducted through thermal shock, high-temp./humid, thermal fatigue and aging tests. In addition, simulation and experiments are performed to evaluate a bondability and long term relaibility using various materials for manufacturing processes as well as high valued products. A representative researches are as follows ; 1.The reliability evaluation of micro joints using lead-free solders and conductive adhesives. 2. Flow characteristics of underfills for electronic packaging. 3. High-reliability evaluation of solar cell ribbon joints. 4. Process control of micro system packaging. 5. Reliability evaluation of automotive electronics components. 6. Life prediction of 3D package joints and development of advanced materials including lead free solders.

Shin, Young Eui
Microsystems Laboratory

The Microsystems Lab. is leading the way towards next generation micro-/nano-systems including material, design, reliability, and fabrication technologies. Our research and development activities include e.g. MEMS, NEMS and electronic packaging technologies. Our group is also interested in micro/nano bubble technologies including nanobubble incorporated novel materials (water, fuel, polymer, etc), bio-cell culture, water treatment and micro/nano-fludics.

Kim, Jong Min
Multiscale Thermal Engineering Laboratory

The MTEL group is involved in the Mechanical Engineering Department at Chung-Ang University. Our research is focused on the following topics: multiphase flows and heat/mass transfer, computational fluid dynamics, and multiphysics. Some specific topics include wetting dynamics of a droplet (wettability change induced by the surface treatment), interfacial phenomena during evaporation, condensation and ice formation change on functional surfaces, ultrashort pulse laer ablation analysis, micro-fluidics and sensing technology, thermal spray technology(CFD analysis and experiments), and nitriding technology for anti-corrosion surface development. Our work is interdisciplinary and combines mechanical engineering, physics, and materials science.

Lee, Seong Hyuk
Nano Manufacturing Technology Laboratory

We focused on the novel manufacturing technologies for micro/nano structures for optical, biological, mechanical and energy applications

[Key manufacturing technologies]
- Nanoreplication / Nanoimprinting for polymer and glass materials
- Novel nano manufacturing technologies (Glancing angle deposition, Vitreous Carbon)
- Conventional micro/nano patterning (Photolithography, Etching, etc.)

[Application fields]
- Micro/Nano Optical components for LED, Display, Communication, Photonic IC, etc.
- Bio chip, Bio sensor, Lab on a chip, Chemical Sensor
- Next generation energy technologies (solar cell, fuel cell)

Kim, Seok-min
Noise & Vibration Laboratory

The Noise & Vibration Lab is equipped with the necessary state-of-the-art hardware and software required for measurement, analysis, and control of undesired vibration and noise of structures and machinery. The main interesting research fields of the lab. are to develop, investigate, and evaluate experimental and analytical approaches to estimate the dynamic properties of structural systems. The recent work has focused on the development of special damping systems for the vibration control of high-rise building machinery and semiconductor production machinery. The lab is also interested in various applications of the system identification and signature analysis method in dynamic systems.

Lee, Jae Eung
Robot Engineering Laboratory

In our lab, the driving gear of the robot which is a core part of the design and analysis for robot is studying. Any driving units in industrial applications for example (the electric vehicle ) are studying. In addition to the design and production of driving units, In the lab, the gear tooth strength assessment and the design method are studied. Patent for invention and creative techniques for venture are introduced will widen the knowledge about the engineering.

Oh, Se Hoon
Smart Design & Innovative Manufacturing Laboratory

Research Interests of Smart Design & Innovative Manufacturing (SDIM) Laboratory include: 1. Smart Surface Texturing for Mechanical Components, 2. Innovative Process Design for Sustainable Manufacturing, 3. Development of Methodology for Enhancing Reliability of Structural Components, 4. Smart Product Design for Sustainability, 5. Ultra Precision Engineering.

Choi, Young Sik
Structural Information based Design Laboratory

Extraction of the complicated strucures was performed by engineer's hand or simple experiment. In the 1980s aided by advances in computing resources, it is possible to simulate structural information using the computer. It can be expanded and developed to the virtual experiment that engineer's long-awaited, and it is expected to play an important role in knowledge-based future. In our LAB, analysis of mechanical system and simulation is performed by computer. The FEM(Finite Element Method) is used for main analysis technique. Engineering workstation, PC and comercial analysis tool are used for comtutational simulation. Interested fields are development of the thermal analysis module for CAE system, FSI(Fluid-Structure interaction) simulation, evaluation of high temperature degradation, development of life prediction program and fatique analysis of steel bridges.

Cho, Seong Wook
System Design with Advanced Composites Laboratory

We investigate the mechanical behavior of anisotropic materials such as fiber reinforced composites (carbon/epoxy composites, glass/polypropylene composites) including bio-tissues (bones, muscles and tendons) by using analytical and experimental methods. We also design various machine components and medical devices such as bone plates using fiber reinforced composites. The major research topics are as follows: 1) Design of composite prostheses for healing bone fractures, 2) Design of composite hydrogen pressure vessels for fuel cell vehicles, 3) Study of electroacrive polymers (EAP) for the application of various actuators, and 4) Characterization of polymer concretes.

Chang, Seung Hwan
Turbulence and Biomedical Fluid Mechanics Lab.

Our research focuses on the application of theoretical and computational methods to solve various thermal and fluid flow problems. For fundamental understanding of flow physics such as the interaction of shock waves and turbulence, we combine theoretical models and direct numerical simulations (DNS). Similarly, to understand the physics of flow generated noise (i.e. aeroacoustics), we use instability wave theories and large eddy simulations (LES) together with some of statistical approaches such as proper orthogonal decomposition methods (POD). For applied engineering and biomedical problems, we employ Reynolds averaged Navier-Stokes Solvers (RANS). Recent engineering and biomedical topics include thermal and flow analysis in gas turbine engines using commercial packages and cerebral blood flow modeling using mathematical models and 1D Navier-Stokes solver.

Ryu, Jaiyoung