Mechanical Engineering
 

Jeong-Beom Ihn - Affiliate Assistant Professor

Stanford University (PhD 2003)
Stanford University (MS 1998)
University of Michigan (BS 1994)

Courses

ME/MSE 568 Active and sensing materials and their device, Spring Quarter, 2009

Contact Information

Phone: (206) 544-7558
Fax: (206) 544-4774
Email 1: jbihn@u.washington.edu
Email 2: jeong-beom.ihn@boeing.com

Biography

Dr. Ihn received his B.S. from University of Michigan in 1994, and Ph.D. in Aeronautics/Astronautics from Stanford in 2003. He was appointed as a research associate at Stanford from 2003 – 2005. He has been at Boeing Phantom Works and Boeing Research & Technology in Seattle since 2005.

Dr. Ihn research interests have concentrated on developing smart structures, active sensing materials and structural health management system (SHM) for current and future aerospace vehicles. His research expertise includes digital signal processing for guided waves, damage characterization/diagnostic imaging technique using a network of piezoelectric sensors, and SHM system integration. In particular, he has pioneered various SHM techniques for monitoring of military and commercial aircraft structures, including bonded composite repairs, thermal protection system, fuselage lap joints and Hot Spots, with results published into multiple book chapters, US patents, conference and journal papers. He currently leads various research projects and programs in the area of SHM with University and Government labs as well as within Boeing.

Current Research Projects

Current research is focused on development and implementation of Structural Health Management System (SHM) to current and future aerospace structures. Primary research is now focused in these areas:

Dr Ihn is in collaboration with Dr Taya’s group, Center for Intelligent Materials and Systems (CIMS) for prototyping self-powered SHM systems. Dr Ihn holds 10 US patents (pending) in the area of SHM and smart structures.

Selected Publications

  1. Chapter Contribution: C Soutis and J-B Ihn, “Design, Analysis and Structural Health Monitoring of Bonded Composite Repair and Substructure”, Encyclopedia of Structural Health Monitoring, Wiley
  2. Chapter Contribution: J-B Ihn and F-K Chang, “Active Structural Health Monitoring for Aircraft Riveted Lap Joints”, Encyclopedia of Structural Health Monitoring, Wiley
  3. J-B Ihn, F-K Chang, “Pitch-Catch Active Sensing Methods in Structural Health Monitoring for Aircraft Structures”, Journal of Structural Health Monitoring, 7 5-19, 2008
  4. J-B Ihn and Jerry Huang, “Structural Health Monitoring for Composite Airframe of Next Generation Space Vehicles”, Proceedings of SMSST, Nanjing, China, 2007 (invited paper)
  5. Chapter contribution: JB Ihn and Fu-Kuo Chang, “Chapter 9- Ultrasonic Nondestructive Evaluation for Structural Health Monitoring: Built-in Diagnostics for Hot-Spot Monitoring in Metallic and Composite Structures,” Ultrasonic Nondestructive Evaluation: Engineering and Biological Material Characterization, Edited by Kundu, CRC press, 2003
  6. Chapter contribution: F-K Chang, J-B Ihn and Eric Blaise, “Design of Active Structural Health Monitoring System for Aircraft and Spacecraft Structures,” Damage Prognosis, Edited by D.J. Inman, C. R. Farrar, V. L. Lopes, Jr, and V. Steffen Jr., Wiley, (invited chapter, available in January 2005)
  7. Yujun Kim, J-B Ihn, and F-K Chang, “ 3D Spectral Element Method for Built-in Diagnostics,” The Fourth Australian Congress on Applied Mechanics, Feb 16-18, Melbourne, Australia, 2005 (invited keynote paper)
  8. J-B Ihn, F-K Chang, “Detection and Monitoring of Hidden Fatigue Crack Growth Using a Built-In Pizoelectric Sensor/Actuator Network: Part I. Diagnostics”, Smart Materials and Structures, 13 609-620, 2004.
  9. J-B Ihn, F-K Chang, “Detection and Monitoring of Hidden Fatigue Crack Growth Using a Built-In Pizoelectric Sensor/Actuator Network: Part II. Validation through riveted joints and repair patches”, Smart Materials and Structures, 13 621-630, 2004.
  10. J-B Ihn, Fu-Kuo Chang, J. Huang and M. Derriso, “Diagnostic Imaging Technique for Structural Health Monitoring”, The 2st European Workshop on Structural Health Monitoring, pp. 109-116, July 7-9, 2004, Munich, Germany
  11. J-B Ihn, Fu-Kuo Chang, “Hot-spot Monitoring for Aircraft Structures”, The 1st International Workshop on Advanced Smart Materials and Smart Structures Technology, pp. 69-76, January 12-14, 2004. Hawaii, USA
  12. J-B Ihn, F-K Chang and H. Speckmann, 2001: Built-in Diagnostics for Monitoring Crack Growth in Aircraft Structures; Proc. of 4th Internat. Conf. on Damage Assessment of Structures (DAMAS), Cardiff/Wales, Key Engineering Mat., Vols. 204-205, Trans tech Publ., pp. 299-308.
  13. J.-B. Ihn and F.-K. Chang, “Multi-crack growth monitoring at riveted lap joints using piezoelectric patches”, Proceedings of SPIE’s 7th Annual International Symposium on NDE for Health Monitoring and Diagnostics, Vol. 4702, pp. 29-40, 17-21 March 2002.
  14. J.-B. Ihn and F.-K. Chang, “Built-In Diagnostics for Monitoring Crack Growth in Aircraft Structures”, Proceedings of the 3rd International Workshop on Structural Health Monitoring, Stanford, U.S.A., pp.284-295, 2001.
  15. J.-B. Ihn and F.-K. Chang, “Smart Patches for Monitoring Crack Growth in Aircraft Structures”, Proceedings of 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Denver, Colorado, 22 - 25 Apr., 2002
  16. Lihua Shi and Jeong-Beom Ihn, “Identification of Time-Domain Reflectometry Measurement Results by Wavelet Modeling”, Proceedings of the 3rd International Workshop on Structural Health Monitoring, Stanford, U.S.A., pp.1269-1278, 2001.
  17. C. Boller, J.-B. Ihn, W.J. Staszewski and H. Speckmann, “Design Principles and Inspection Techniques for Long Life Endurance of Aircraft Structures”, Proceedings of the 3rd International Workshop on Structural Health Monitoring, Stanford, U.S.A., pp.275-283, 2001.
  18. Jeong-Beom Ihn and F.-K. Chang, “A Smart Patch for Monitoring Crack Growth in Metallic Structures underneath Bonded Composite Repair Patches”, Proceedings of the American Society for Composites 17th Technical Conference, Purdue University, 2002.