Dale E. Chimenti

Professor of Aerospace Engineering

CONTACT INFORMATION

• Aerospace Engineering Dept.
  1200 Howe Hall
  Iowa State University
  Ames IA 50011-2271 USA
  515 / 294-5853, FAX: 294-3262
  
• Center for Nondestructive Evaluation
  1915 Scholl Road
  Iowa State University
  Ames IA 50011-3042 USA
  515 / 294-5021, FAX: 294-7771

Resources for Students

CONCURRENT POSITIONS

• Senior Scientist, Center for NDE, Iowa State University, Ames  (1993–)
• Professeur Invité, Université Bordeaux I, Bordeaux, France (1999, 2000)
• Gastprofessor, Universität Stuttgart, Stuttgart, Germany (2000–01)

EDUCATION

• PhD, Physics, Cornell University, 1974
• MS, Physics, Cornell University, 1972
• BA (Magna cum Laude), Physics, Cornell College, 1968

PROFESSIONAL EXPERIENCE

• Research Professor of Materials Science and Engineering and
  Associate Director, Center for Nondestructive Evaluation (1989–1993)
  The Johns Hopkins University, Baltimore MD

• Materials Research Engineer / Research Physicist (1978–1989)
  US Air Force Materials Laboratory
  Wright-Patterson AFB, Dayton, OH

• Guest Scientist and Alexander von Humboldt Fellow (1976–1978)
  Lehrstuhl für Experimentalphysik II
  Physikalisches Institut, Universität Tübingen
  Tübingen, Germany

• Research Associate (1974–1976)
  Solid State Science Division
  Argonne National Laboratory, Argonne IL

• Research Assistant (1970–1974)
  Laboratory of Atomic and Solid State Physics
  Cornell University
  Ithaca, NY

SOCIETY AFFILIATIONS

• Acoustical Society of America, Fellow
• American Academy of Mechanics, Member

RECENT PROFESSIONAL INVOLVEMENTS

• Editor-in-Chief, NDT&E international , 1995–present. A journal publication of Elsevier Science Ltd, Oxford, England. Use link to learn more about the aims and scope of NDT&E international and see instructions for submission of manuscripts.
• Associate Editor, General Linear Acoustics, Journal of the Acoustical Society of America , 1998–2004.
• Co-Editor, Review of Progress in Quantitative Nondestructive Evaluation , Volumes 1–25, 1981–present. These books are the proceedings of the annual meeting and are published by Plenum Press, New York (vols 1–18) and AIP Press, New York (vols 19–25).
• Member of the International Editorial Board, Ultrasonics, 1991–2001.
• Member of the Technical Editorial Board, Journal of Nondestructive Evaluation , 1988–present.
• Member, Technical Committee on Physical Acoustics, Acoustical Society of America, 1998–present.
• Organizer, NDT&E international Tutorial session, at Ultrasonics International `99, Copenhagen, Denmark, June 1999. Also UI `97 (Delft, The Netherlands, 1997) and at UI `95 (Edinburgh, Scotland, 1995).
• Co-Organizer, Review of Progress in Quantitative NDE, 1984–2007.

NOTABLE EVENTS

• David R. Boylan Eminent Faculty Research Award, 2007.
• Invited keynote speaker, Advanced NDE Conference, Busan, Korea, 2007.
• Invited keynote speaker, Chaoyang University of Technology, Taichung, Taiwan, 2005.
• Elected Fellow, Acoustical Society of America, 1998.

CAMPUS ASSIGNMENTS

• Director of Graduate Education, Aerospace Engineering, 2002–2005.
• Historian, Phi Beta Kappa, Zeta of Iowa Chapter, College of Liberal Arts and Sciences, 2004–present.
• Member, Promotion and Tenure Committee, College of Engineering, 1998–2001.
• Member, Academic Standards Committee, College of Engineering, 1997–2001.
• Member, Judiciary and Appeals Committee, University Faculty Senate, 1999–2002.
• President, Phi Beta Kappa, Zeta of Iowa Chapter, College of Liberal Arts and Sciences, 1998–99.
• Member, ETRC (Howe/Hoover Hall) Building Design Committee, IPRT, 1993–95.
• Chair, Committee on the NDE Minor, College of Engineering, 1996–2002.

TEACHING DUTIES

• Engineering Mechanics 345,  Dynamics.
• Engineering Mechanics 548,  Advanced Dynamics (grad).
• Engineering Mechanics 518,  Elastic Wave Propagation in Solids (grad).
• Engineering Mechanics 550,  Advanced Nondestructive Evaluation (grad).
• Aerospace Engineering 351,  Astrodynamics.
• Aerospace Engineering 451,  Intermediate Astrodynamics.
• Aerospace Engineering 464,  Space Vehicle Design.
• Aerospace Engineering 492,  Aerospace Senior Symposium.
• Honors Program Seminar 321, Topics related to Art History

RESEARCH INTERESTS

• Fundamental elastic guided wave studies and applications
  
• Air-coupled ultrasonics and characterization of light-weight materials
  
• Ultrasonic characterization of composite materials
  
• Novel uses of NDE in the processing of foods
  
• Engineering education
  

• Fundamental elastic guided wave studies and applications.
  Voltage signals from ultrasonic waves scattered from planar media measured in two-transducer experiments; 3-D voltage calculation separates geometry and materials influence. Results show equivalence of Gaussian and piston-radiator beams in pitch-catch matched transducer experiments. Excellent detailed agreement between theory and measurements is found. Applications are to leak location in spacecraft and  materials characterization and the reflection of finite acoustic beams and their interaction with fluid-loaded structures.

  Related Output

  1. Leak detection in manned spacecraft using structure-borne noise, Ron Roberts, Dale E. Chimenti, Stephen D. Holland, Patent Disclosure ISURF #03289.
  2. An ultrasonic array sensor for spacecraft leak direction finding, by Stephen D. Holland, R. A. Roberts, D. E. Chimenti, and Michael Strei, Ultrasonics 45, 121–126 (2006).
  3. Locating air leaks in manned spacecraft using structure-borne noise, Stephen D. Holland, D. E. Chimenti, R. A. Roberts, and M. Strei, Journal of the Acoustical Society of America 121, 3484–92 (2007).
  4. Distributed-sensor ultrasonic spacecraft leak detection using structure-borne noise, Stephen D. Holland, R. A. Roberts, D. E. Chimenti, and M. Strei, Applied Physics Letters 86, 174105-1–174105-3 (2005).
  5. Two-sensor ultrasonic spacecraft leak detection using structure borne noise, Stephen D. Holland, R. A. Roberts, D. E. Chimenti, and M. Strei, Acoustic Research Letters Online, 6(2), 63–68 (2005).
  6. Equivalence of Gaussian and piston transducer voltages ,   Oleg I. Lobkis and D. E. Chimenti, Journal of the Acoustical Society of America, 114 (6), 3155–3166 (2003).
  7. Scattering coefficient reconstruction in plates using focused acoustic beams, by D. E. Chimenti and Dong Fei, International Journal of Solids and Structures, 39 , 5495–5513 (2002).
  8. Single-scan elastic property estimation in plates , Dong Fei and D. E. Chimenti, Acoustic Research Letters Online 2 (1), 49–54 (2001).
  9. In-Plane Elastic Property Characterization in Composite Plates , O. I. Lobkis, D. E. Chimenti, Han Zhang, Journal of the Acoustical Society of America 107, 1852–58 (2000).
  10. 3-D Transducer Voltage in Anisotropic Materials Characterization , O. I. Lobkis and D. E. Chimenti, Journal of the Acoustical Society of America 106, 36–45 (1999).
  11. Transducer Misalignment Effects in Beam Reflection from Elastic Structures, Han Zhang, D. E. Chimenti, and Smaine Zeroug, Journal of the Acoustical Society of America 104, 1982–91 (1998).
  12. Ultrasonic beam reflection from fluid-loaded cylindrical shells, T. J. Cloutier, A. Safaeinili, D. E. Chimenti, S. Zeroug, and L. B. Felsen, Journal of Applied Physics 83, 2408–19 (1998).
  13. Elastic guided waves in plates with surface roughness. I. Model Calculation, O. I. Lobkis and D. E. Chimenti, Journal of the Acoustical Society of America 102, 143–49 (1997).
  14. Elastic guided waves in plates with surface roughness. II. Experiments , O. I. Lobkis and D. E. Chimenti, Journal of the Acoustical Society of America 102, 150–59 (1997).
  15. Elastic guided waves in plates with rough surfaces, O. I. Lobkis and D. E. Chimenti, Applied Physics Letters 69 , 3486–88 (1996).
      
      
• Air-coupled ultrasonics for use in rapid NDE and characterization of light-weight materials.
  Infiltration defects in prepreg graphite-epoxy composite have been detected and characterized. Excellent discrimination among high, medium, and low quality material has been demonstrated. Investigations on influence of transducer performance, focusing effects, and generation of leaky waves. Synthetic aperture methods used to characterize viscoelastic properties of composites in air-coupled transmission experiments. C-scans have also been carried out.

  Related Output

  1. Spherically Focused Air-Coupled  Foil Transducer, Junho Song and Dale E. Chimenti, Patent Disclosure ISURF #03209.
  2. Spherically focused capacitive film air-coupled ultrasonic transducers, Junho Song, D. E. Chimenti, and Stephen D. Holland,  JASA Express Lett. 119(2), EL1–EL6 (2006).
  3. Design, fabrication and characterization of a spherically focused capacitive air-coupled ultrasonic transducer, by Junho Song and D. E. Chimenti, International Journal of Applied Science and Engineering 4(1), 1–19 (2006).
  4. Air-coupled acoustic imaging with zero group velocity Lamb modes, S. D. Holland and D. E. Chimenti, Applied Physics Letters 83(13), 2704–2706 (2003).
     
  5. Air-coupled, focused ultrasonic dispersion spectrum reconstruction in plates, S. D. Holland S. V. Teles, and D. E. Chimenti, Journal of the Acoustical Society of America 115(6), 2866–2872 (2004).
  6. Transmission Coefficient Reconstruction in Air-Coupled Ultrasonics, Han Zhang and D. E. Chimenti, Journal of Nondestructive Evaluation 22, 23–36 (2003).
     
  7. 2-D and 3-D complex-transducer-point analyses of beam reflection from anisotropic plates, Han Zhang and D. E. Chimenti, Journal of the Acoustical Society of America 108, 2729–37 (2000).
  8. Air-Coupled Ultrasonic Beam Transmission Applied to Material Characterization, Han Zhang and D. E. Chimenti, in Review of Progress in Quantitative NDE, vol 18, eds D. O. Thompson and D. E. Chimenti, (Plenum Press, New York, 1999), 1273–80.
  9. Air-Coupled Ultrasonic Estimation of Viscoelastic Stiffnesses in Plates, A. Safaeinili, O. I. Lobkis, and D. E. Chimenti, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 43, 1171–80 (1996).
     
     
• Ultrasonic characterization of composite materials.
  

Ultrasonic study of the propagation of leaky plate waves in anisotropic, layered advanced materials for aircraft or naval applications. Performing extensive experimental measurements of guided elastic waves in highly inhomogeneous layered composites. Have observed and measured Floquet behavior in periodic composite plates having as few as two unit cells; also, studied sensitivity to thickness, elastic properties. We have shown that Floquet wave solutions form partial wave decomposition of SH waves in periodic plates. Work is continuing to assess implications for materials inspection and to construct an inspection protocol.

Related Output

1. Closed disbond detection in marine glass-epoxy/balsa composites, by Sorin V. Teles and D. E. Chimenti, NDT&E International, under review.
2. Material property estimation in thin plates using focused, synthetic-aperture acoustic beams, by Dong Fei, D. E. Chimenti, and S. V. Teles, Journal of the Acoustical Society of America 113 (5), 2599–2610 (2003).
3. Microwave excitation of elastic vibrations in anisotropic composite plates, E. Guilliorit, B. Hosten, C. Bacon, D. E. Chimenti, Ultrasonics 41 97–103 (2003).
4. Acoustic waves generated by pulsed microwaves in viscoelastic rods: Modeling and experimental verification,  E. Guilliorit, C. Bacon, B. Hosten, and D. E. Chimenti, Journal of the Acoustical Society of America 110 (3), 1398–1407 (2001).
5. Guided Waves in Plates and their Use in Materials Characterization , D. E. Chimenti, Applied Mechanics Reviews 50, 247–284 (1997) [invited].
6. An Inspection Protocol for ARALL Composite Laminates , Arnold Kettenacker, MS Thesis, Iowa State University (1996).
7. SH Wave Propagation in Periodically Layered Composites , B. A. Auld, D. E. Chimenti, and P. J. Shull, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 43 , 319–325 (1996).
8. A Floquet Analysis of Guided Lamb Waves in Periodically Layered Composites, A. Safaeinili and D. E. Chimenti, Journal of the Acoustical Society of America 98, 2336–42 (1995).
   

• Novel uses of NDE in the processing of foods .
  By employing NDE methods in novel ways, new applications of NDE technology in food processing are being developed. The first of these is the determination of the doneness of bread using air-coupled ultrasonics to assess the state of polymerization of wheat gluten in the standard one-pound commercial white bread. The methods investigated here are all completely compatible with industry-standard commercial moving-belt ovens. Preliminary results have shown significant promise.

  Related Output

  1. Online, Noncontact Baking Monitor for Bread, L. Faeth and D. E. Chimenti, Cereal Foods World 44, 155–57 (1999).
  2. An Ultrasonic Noncontact Method to Monitor the Doneness of Bakery Products, D. E. Chimenti and L. Faeth, in Review of Progress in QNDE 19, (Plenum Press, New York, 2000), pp. 1849–56.
  3. Non-Invasive Monitoring of the Doneness of a Baked Product , US Patent Application, No. 09/375,411, 17 Aug 1999.
     

  
  

• Engineering Education.
  Contributions to student understanding of basic physical phenomena in engineering mechanics.

  Related Output

  1. A 3-D Simulator for Moments of Inertia, D. E. Chimenti and Stuart S. Ochs, Computer Applications in Engineering Education 7, 221–26 (2000).

Copyright©1996-2006  D. E. Chimenti. All Rights Reserved. No rebroadcast permitted without the express permission of Major League Baseball.

Last updated: July 2007

chimenti@iastate.edu

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