Theoretical fracture mechanics by using the complex
variable approach and integral equation method.
Computational fracture mechanics by using the
boundary
element method and finite element method.
The classification and detection of the defects by using
acoustic emission method and neural network.

1979∼1980 Head of Division, Korea Institute of
Machinery
and Materials (KIMM)
1980∼ Assistant Professor, Associate Professor,
Professor,
School of Mechanical Engineering, Yonsei
University, Korea
1989∼1991 Associate Dean, Graduate School of
Engineering,
Yonsei University, Korea
Director, Korean Society of Automobile Engineers
Advisory Committee, Korea Power Engineering
Company
1991∼1993 Chairman, Department of Mechanical
Engineering,
Yonsei University, Korea
1995∼1996 Head, Division of Automobile Body and
Chasis,
Korean Society of Automobile Engineers
1996∼1998 Advisory Committee, Inchon International
Airport Construction Project
1998∼1999 Director, Korean Society for Nondestructive
Testing
1999 General Secretary, Korean Society of Mechanical
Engineers
1999∼2001 Head, Division of Automobile Body and
Chasis,
Korean Society of Automobile Engineers
1999∼ 2002 Director, Alumni Association, Yonsei
University, Korea
1999~ Representative, Korean Federation of
Science
and Technology Societies
2000∼ President, Yonsei Techno Cooperation Center
Auditor, Korean Society for Nondestructive
Testing
2000~2002 Vice President, Korean Society of
Mechanical
Engineers
2002~ Vice President, Korean Society of Nondestructive
Testing
2003 President, Korean Society of Mechanical
Engineering
President, Korean Association of Mechanical Engineering
Societies

1987 Yonsei Academic Award, Yonsei University,
Korea
1988 Academic Award, Korea Society of Mechanical
Engineers
1996 Yonsei Excellent Professor Award, Yonsei
University, Korea