2019
DOI: 10.4028/www.scientific.net/msf.962.227
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Piezoelectric Based Lamb Waves Generation and Propagation in Orthotropic CFRP Plates: II. Influence of Interfacial Stress Distribution

Abstract: This paper investigates the Lamb wave generation by the surface bonded circular piezoelectric (PZT) actuator and wave propagation within the orthotropic Carbon Fiber Reinforced Plastic (CFRP) plate considering the anisotropy of the elastic and damping properties of the materials; existence of the adhesive layer; and dependence of the interfacial stress distribution on the surface between host plate and actuator, on the anisotropy of the plate material, and on the excited frequency, wavelength and plate thickne… Show more

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Cited by 7 publications
(24 citation statements)
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“…The sources, which have been used to adequately build the transducer's structure and replicate its dynamics in FE model, were the technical notes about the ultrasonic principles important to wedge transducer application and design, including the scheme and main requirements to the active element, backing, matching layers and the sound path presented by Olympus Co. ® [48], the outer dimensions of the used actuator (see Figure 3), the frequency response functions for the electric current through PZT active plate, and out-of-plane displacement amplitude on the actuator's footprint (see Figure 4a,b), which have been determined experimentally. Only averaged normal displacement amplitudes of the actuator's contact surface were measured experimentally by using the VibroGo single-point vibrometer (Polytec Co. ® , Irvin, Figures 1b and 2b demonstrates that the wavelength of A0 Lamb waves mode is 2-5 time less than the wavelength of SS0 horizontally polarized shear wave, i.e., spatial defects resolution of A0 waves can be significantly better that is fully consistent with the results of the papers [11,20,22,30].…”
Section: The Finite-element Model Of the Angle-beam Wedge Actuator Gsupporting
confidence: 77%
See 3 more Smart Citations
“…The sources, which have been used to adequately build the transducer's structure and replicate its dynamics in FE model, were the technical notes about the ultrasonic principles important to wedge transducer application and design, including the scheme and main requirements to the active element, backing, matching layers and the sound path presented by Olympus Co. ® [48], the outer dimensions of the used actuator (see Figure 3), the frequency response functions for the electric current through PZT active plate, and out-of-plane displacement amplitude on the actuator's footprint (see Figure 4a,b), which have been determined experimentally. Only averaged normal displacement amplitudes of the actuator's contact surface were measured experimentally by using the VibroGo single-point vibrometer (Polytec Co. ® , Irvin, Figures 1b and 2b demonstrates that the wavelength of A0 Lamb waves mode is 2-5 time less than the wavelength of SS0 horizontally polarized shear wave, i.e., spatial defects resolution of A0 waves can be significantly better that is fully consistent with the results of the papers [11,20,22,30].…”
Section: The Finite-element Model Of the Angle-beam Wedge Actuator Gsupporting
confidence: 77%
“…. The angular distribution of relative dimensionless attenuation coefficient for the anti-symmetric A0 waves propagating from the center of the orthotropic CFRP panel [20].…”
Section: Investigation Of the Wave Propagation Generated By The Orienmentioning
confidence: 99%
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“…The particular shapes of the waves intensity angular distributions can be explained by the forms of the actuator's vibration modes. The very large computational complexity of the task did not allow us to reveal the distribution of contact stress on the actuator footprint in the same way as was done in [31]. These stresses sharply increase near the border of the footprint and change around its perimeter.…”
Section: Analysis Of Directivity Fora 0 Lamb and Ss0 Horizontally Polmentioning
confidence: 99%