Mechanical Engineering Engineer

SPECIALTIES

Extensive Finite Element Analysis:

Electronics under Shock/ Random Vibration, Ultrasonic Wave Propagation,Electro-mechanical Coupling, Thermo-mechanical Coupling, Contact-impact, Composite, Rubber-like Material, Plasticity, Visco-elasticity/plasticity, Structural Reliability Prediction based on Failure, Composite Tubes Crash, Composite Pressure Vessel(filament winding rocket motor), Nozzles Ablation.

Shock & Vibration:

Development of Core Engine related to Shock/Random Vibration(www. luxea.com).

in Electronics

- Shock Response Spectrum, Drop Shock ,Pulse Shock, Random Vibration.

Structural Health Monitoring:

Digital Signal Processing for Structural Damage/impact Identification, Phased Array(pitch-catch method for detecting back-wall crack in thick plate), Interface Effect between Piezo-sensors and Hosting structures, Parametric Study for Piezo-sensor Design.

Fracture Mechanics:

Applied Mathematics, Asymptotic Representation for Boundary Layer Regions, Computational Fracture Mechanics for Identifying Singular Stress Field (boundary collocation, hybrid FEM), Failure/fatigue Analysis of Iso/Anisotropic Material.

Non-linear Mechanics:

Tensor Theory, Geometrical/material instability, Contact-Impact,Non-linear Finite Element Formulation, Optimization, Detonation Physics.

Programming Skill:

Non-linear Implicit & Explicit Finite Element Lagrangian program,

All Sorts of Numerical Scheme by Fortran, C and Basic Language under Unix/PC

Environment.

Experimental Skill:

Test of Mechanical Properties for Fiber Reinforced Composite Material,

Test of Structural Integrity for Fiber Reinforced Composite Pressure Vessel,

All Sorts of Data Collection and Its Analysis.

Software Applications:

PRO/E, PRO/MECHANICA, I-DEAS, PATRAN, ABAQUS, ANSYS, LS-DYNA, AUTODYN, DYTRAN, AUTOCAD,MATLAB, MS office.

EXPERIENCE

04/2008 – Lux Engineering Analysis Inc., SanJose, CA

Member of Technical Staff

>> Develop Lux_Calculator (Shock/Vibration Core Engine, www.luxea.com)

>> FEA Consulting( from Northrop Grumman) - Shock/Vibration & Heat Transfer for Electronics

08/2007 – 01/2008 Alliant Techsystems Inc. (ATK), Clearfield, UT

Senior Engineer

>> Performed damage tolerance analysis of composite structures (project for NASA ARES I first stage Frustum Design

>> Formulated nonlinear constitutive equation for composite materials (Internal R&D)

>> Implemented process-induced residual stress evaluation in composite materials (Internal R&D)

08/2005 – 09/2006 Stanford University, Stanford, CA

Research Associate

>> Developed active diagnostic simulation for crack detection(Sponsored by FAA)

07/2002 – 03/2005 Stanford University, Stanford, CA

Postdoctoral Research Affiliate

>> Developed computational code for in-situ structural health monitoring system(Sponsored by NSF and AFOSR)

>> Performed FEA of textile composite tubes for crash energy absorption(Sponsored by Automotive Composite Consortium)

02/1997 – 06/2002 Agency for Defense Development, Taejon, South Korea

Senior Researcher

>> Performed design of advanced missile structures such as composite solid rocket

motor cases & their nozzles

>> Tried bullet impact test for solid rocket motor & its numerical simulation

09/1996 – 01/1997 Korea Advanced Institute of Science & Technology, Taejon, South Korea

Postdoctoral Research Affiliate

>> Developed mathematical models of singular stress field for general wedges(Sponsored by Korea Research Foundation)

EDUCATION

03/1991 – 08/1996 Korea Advanced Institute of Science & Technology, Taejon, South Korea

Ph.D. in Mechanical Engineering(full government scholarship student)

03/1989 – 02/1991 Korea Advanced Institute of Science & Technology, Taejon, South Korea

M.S. in Mechanical Engineering(full government scholarship student)

03/1985 – 02/1989 Hanyang University, Seoul, South Korea

B.S. in Mechanical Engineering(full university scholarship student)

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