Academic literature on the topic 'Normal Lamb's waves'
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Journal articles on the topic "Normal Lamb's waves"
Schiel, Klaus, and João S. Protázio. "Transient-wave solution for Lamb's problem at the free surface." Bulletin of the Seismological Society of America 79, no. 6 (December 1, 1989): 1956–71. http://dx.doi.org/10.1785/bssa0790061956.
Full textXu, Heming, Steven M. Day, and Jean-Bernard H. Minster. "Two-dimensional linear and nonlinear wave propagation in a half-space." Bulletin of the Seismological Society of America 89, no. 4 (August 1, 1999): 903–17. http://dx.doi.org/10.1785/bssa0890040903.
Full textBurton, D. M. F., and H. Babinsky. "Corner separation effects for normal shock wave/turbulent boundary layer interactions in rectangular channels." Journal of Fluid Mechanics 707 (August 2, 2012): 287–306. http://dx.doi.org/10.1017/jfm.2012.279.
Full textAmin, Ushtar, Lucy Sullivan, Pat Trudeau, and Selim R. Benbadis. "Association Between Positive Occipital Sharp Transients of Sleep and Lambda Waves." Clinical EEG and Neuroscience 50, no. 3 (November 14, 2018): 219–21. http://dx.doi.org/10.1177/1550059418813020.
Full textBeamish, J. R., and K. Warner. "Ultrasonic studies of liquid helium in porous media." Canadian Journal of Physics 65, no. 11 (November 1, 1987): 1557–59. http://dx.doi.org/10.1139/p87-254.
Full textSedaghat, A., J. A. D. Ackroyd, and N. J. Wood. "Turbulence modelling for supercritical flows including examples with passive shock control." Aeronautical Journal 103, no. 1020 (February 1999): 113–25. http://dx.doi.org/10.1017/s0001924000027810.
Full textNishawala, V. V., M. Ostoja-Starzewski, M. J. Leamy, and E. Porcu. "Lamb's problem on random mass density fields with fractal and Hurst effects." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2196 (December 2016): 20160638. http://dx.doi.org/10.1098/rspa.2016.0638.
Full textCouldrick, J. S., S. L. Gai, J. F. Milthorpe, and K. Shankar. "Normal shock wave/turbulent boundary-layer interaction control using ‘smart’ piezoelectric actuators." Aeronautical Journal 109, no. 1101 (November 2005): 577–83. http://dx.doi.org/10.1017/s0001924000000919.
Full textHa, B., C. L. Lucas, G. W. Henry, E. G. Frantz, J. I. Ferreiro, and B. R. Wilcox. "Effects of chronically elevated pulmonary arterial pressure and flow on right ventricular afterload." American Journal of Physiology-Heart and Circulatory Physiology 267, no. 1 (July 1, 1994): H155—H165. http://dx.doi.org/10.1152/ajpheart.1994.267.1.h155.
Full textCarcione, José M. "The wave equation in generalized coordinates." GEOPHYSICS 59, no. 12 (December 1994): 1911–19. http://dx.doi.org/10.1190/1.1443578.
Full textDissertations / Theses on the topic "Normal Lamb's waves"
Романюк, Маргарита Игоревна. "Теоретические основы расчета ультразвуковых трактов устройств контроля поверхности металлопроката." Doctoral thesis, Киев, 2015. https://ela.kpi.ua/handle/123456789/13840.
Full textPaget, Christophe. "Active Health Monitoring of Aerospace Composite Structures by Embedded Piezoceramic Transducers." Doctoral thesis, KTH, Aeronautical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3277.
Full textThe objectives of the thesis work were to study theinteraction between embedded piezoceramic transducers andcomposite structures as well as determine techniques tosimplify the Lamb waves analysis. Firstly, this studyconsidered the design of the embedded piezoceramic transducers.Secondly, the effect of the embedded transducer on thecomposite strength as well as the influence of the mechanicallyloaded composite on the characteristics of the embeddedtransducer were investigated. Finally, to simplify the analysisof such complex Lamb wave responses, two techniques weredeveloped. They were based on the wavelet technique and amodelling technique, respectively.
The design of the embedded piezoceramic transducers wasimproved by reducing the stress concentrations in the compositeas well as in all components constituting the piezoceramictransducer, that is, the piezoceramic element, interconnectorand conductive adhesive. The numerical analysis showed that thethickness of the interconnector had no significant influence onthe stress state of the piezoceramic transducer. It was alsofound that a compliant conductive adhesive reduced the stressconcentration located at the edge of the piezoceramic element.The structural integrity of composites embedded with theimproved piezoceramic transducer was investigated. Theexperiments, performed in tensile and compressive staticloading, indicated that the strength of the composite was notsignificantly reduced by the embedded piezoceramic transducer.Further investigations were conducted to evaluate theperformance of the improved piezoceramic transducer used as aLamb wave generator embedded in composites subjected tomechanical loading. The tests were conducted in tensile andcompressive static loading as well as fatigue loading. Thestudy showed a large working range of the embedded piezoceramictransducer. A post processing technique based on the waveletswas further assessed in the detection of damage and in thedamage size evaluation. A new wavelet basis was developedspecially for processing the Lamb wave response. This method,focused on the wavelet coefficients from the decomposition Lambwave response, showed promising results in evaluating thedamage size. The wavelets offered a sensitive tool to detectsmall damage, compared to other detection methods, improvingthe damage detection capabilities. The other technique wasdevoted to the simplification of the generated Lamb waves bythe use of multi-element transducers. The transducers weredesigned using both a normal-mode expansion and a FE-method.This technique allowed reducing the effect of a Lamb wave modetowards another. This technique was successfully implemented ina damage detection system in composites.
Keywords:Embedded piezoceramic, transducer, composite,structural integrity, health monitoring, damage detection, Lambwaves, wavelets, normal-mode expansion, FE-method
Conference papers on the topic "Normal Lamb's waves"
Santoni, Giola B., and Victor Giurgiutiu. "Lamb Wave Tuning Between Piezoelectric Wafer Active Sensors and Host Structure: Experiments and Modeling." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13533.
Full textLin, Bin, and Victor Giurgiutiu. "PVDF and PZT Piezoelectric Wafer Active Sensors for Structural Health Monitoring." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80400.
Full textBonello, Bernard, Rémi Marchal, Rayisa Moiseyenko, Yan Pennec, Bahram Djafari-Rouhani, Jinfeng Zhao, and Olga Boyko. "Silicon Pillars as Resonators in an Acoustical Metamaterial." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37914.
Full textBaillard, André, Jean-Marc Conoir, Dominique Décultot, Gérard Maze, Aleksander Klauson, and Jaan Metsaveer. "A0 Wave in a Submerged Stiffened Cylindrical Shell." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8092.
Full textSchreiber, H. A., and H. Starken. "An Investigation of a Strong Shock-Wave Turbulent Boundary Layer Interaction in a Supersonic Compressor Cascade." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-092.
Full textYoo, Byungseok, Darryll J. Pines, and Ashish S. Purekar. "Multi-Location Actuators and Piezoceramic Based 2-D Spiral Array for Structural Health Monitoring: Thin Isotropic Panels." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3723.
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