Laser ultrasonic techniques are investigated relative to robotic inspection, with the aim of packaging optics within the cargo bay of a robotic car such that the pulsed laser for generation and the continuous laser for the interferometer are located in a remote command center, and optical fibers deliver the laser beams to and from the optics. The first steps are taken toward showing the feasibility of this type of inspection robot to detect surface cracks using rayleigh waves in the pitch-catch mode. Specifically, the geometry of a slit mask used to create directivity is studied with the aim of generating a rayleigh wave that reflects off a (stress corrosion) crack, and then receiving both the incident wave and the reflection with a laser interferometer. Multiphysics simulations and laboratory experiments agree that a concave (inward arc) line slit functions better than a convex (outward arc) line slit, a straight line slit, or an omnidirectional point source.
Achenbach, J.D., 2003, “Laser Excitation of Surface Wave Motion,” Journal of the Mechanics and Physics of Solids, Vol. 51, Nos. 11–12, pp. 1885–1902.
Choi, S., and K.-Y. Jhang, 2013, “Influence of Slit Width on Harmonic Generation in Ultrasonic Surface Waves Excited by Masking a Laser Beam with a Line Arrayed Slit,” NDT & E International, Vol. 57, pp. 1–6.
Choi, S., H. Seo, and K.-Y. Jhang, 2015, “Noncontact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy,” Research in Nondestructive Evaluation, Vol. 26, No. 1, pp. 13–22.
Choi, S., H. Cho, and C.J. Lissenden, 2017, “Selection of Shear Horizontal Wave Transducers for Robotic Nondestructive Inspection in Harsh Environments,” Sensors (Basel), Vol. 17, No. 1, p. 5.
Choi, S., H. Cho, M. Lindsey, and C.J. Lissenden, 2018a, “Electromagnetic Acoustic Transducers for Robotic Nondestructive Inspection in Harsh Environments,” Sensors (Basel), Vol. 18, No. 1, p. E193.
Choi, S., H. Cho, and C.J. Lissenden, 2018b, “Nondestructive Inspection of Spent Nuclear Fuel Storage Canisters Using Shear Horizontal Guided Waves,” Nuclear Engineering and Technology, Vol. 50, No. 6, pp. 890–898.
EPRI, 2013, “Failure Modes and Effects Analysis (FMEA) of Welded Stainless Steel Canisters for Dry Cask Storage Systems,” Technical Report 3002000815, Electric Power Research Institute, Palo Alto, CA.
EPRI, 2017, Extended Storage Collaboration Program (ESCP): Nondestructive Evaluation Subcommittee – Industry Progress Report, Report 3002010617, Electric Power Research Institute, Palo Alto, CA.
Fobar, D.G., X. Xiao, M. Burger, S. Le Berre, A.T. Motta, and I. Jovanovic, 2018, “Robotic Delivery of Laser-Induced Breakdown Spectroscopy for Sensitive Chlorine Measurement in Dry Cask Storage Systems,” Progress in Nuclear Energy, Vol. 109, pp. 188–194.
Lissenden, C.J., S. Choi, H. Cho, A. Motta, K. Hartig, X. Xiao, S. Le Berre, S. Brennan, K. Reichard, R. Leary, B. McNelly, I. Jovanovic, 2017, “Toward Robotic Inspection of Dry Storage Casks for Spent Nuclear Fuel,” Journal of Pressure Vessel Technology, Vol. 139, No. 3, p. 031602.
Luo, S., Y. Wang, Y. Luo, and C. Fan, 2012, “Study of Two-Wave-Mixing Interferometric Method in Ultrasonic Detection Using BSO Crystal,” 2012 IEEE International Conference on Mechatronics and Automation, 5–8 August, Chengdu, China, pp. 1938–1942.
Mehrabi, A.B., and S. Farhangdoust, 2018, “A Laser-Based Non-Contact Vibration Technique for Health Monitoring of Structural Cables; Background, Success, and New Developments,” Advances in Acoustics and Vibrations, Vol. 2018, pp. 1–10.
Meyer, R.M., A.F. Pardini, J.M. Cuta, H.E. Adkins, A.M. Casella, A. Qiao, M. Larche, A.A. Diaz, and S.R. Doctor, 2013, “NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment,” Pacific Northwest National Laboratory, Report PNNL-22495.
NRC, 2015, Standard Review Plan for Renewal of Specific Licenses and Certificates of Compliance for Dry Storage of Spent Nuclear Fuel, NUREG-1927, Rev. 1, US Nuclear Regulatory Commission.
Pouet, B., S. Breugnot, P. Clemenceau, and T. Murray, 2007, “Recent Progress in Multi-Channel Quadrature Interferometer. Demonstration of a Compact Fiberized Architecture,” 33rd Review of Progress in Quantitative Nondestructive Evaluation, AIP Conference Proceedings, Vol. 895, pp. 1668–1675.
Scruby, C.B., and L.E. Drain, 1990, Laser Ultrasonics: Techniques and Applications, Taylor & Francis Group, New York, NY.
Taheri, H., L.W. Koester, T.A. Bigelow, and L.J. Bond, 2017, “Thermoelastic Finite Element Modeling of Laser Generated Ultrasound in Additive Manufacturing Materials,” ASNT Annual Conference, Nashville, TN, pp. 188–198.
Xiao, X., S. Le Berre, K.C. Hartig, A.T. Motta, and I. Jovanovic, 2017, “Surrogate Measurement of Chlorine Concentration on Steel Surfaces by Alkali Element Detection via Laser-Induced Breakdown Spectroscopy,” Spectrochimica Acta Part B: Atomic Spectroscopy, Vol. 130, pp. 67–74.
Xiao, X., S. Le Berre, D.G. Fobar, M. Burger, P.J. Skrodzki, K.C. Hartig, A.T. Motta, and I. Jovanovic, 2018, “Measurement of Chlorine Concentration on Steel Surfaces via Fiber-Optic Laser-Induced Breakdown Spectroscopy in Double-Pulse Configuration,” Spectrochimica Acta Part B: Atomic Spectroscopy, Vol. 141, pp. 44–52.
194 Page Views
0 PDF Downloads
0 Facebook Shares