Abstract
The forced propagation solution of interfacial shear stress of multilayer cladding structure excited by Love waves is derived by the integral transformation method, and the shear resonance mechanism of interfacial separation is further revealed. The coupling resonance between the excitation frequency and structure intrinsic property causes the peak of interfacial shear stress amplitude, which results in interfacial shear separation at certain frequency bands. It is found that the coupling resonance frequency of interfacial shear stress is only dependent on the inherent properties of the structure, around which the frequency band of interfacial shear separation is formed. The coupling resonance frequency decreases with the increase of the cladding thickness or shear wave velocity difference between the cladding and substrate. The influence of cladding material parameters on interfacial shear stress is greater than that of matrix material parameters. The experimental results support the theoretical analysis results. The conclusions presented could have potential applications in ultrasonic deicing/defrosting/de-sanding and/or coatings protection.
Highlights
Interface shear separation mechanism and prediction of cladding structures excited by horizontal shear waves should be studied in depth
The displacement solution of a single cladding structure excited by horizontal shear waves was derived by the integral transformation method, and it was found that the displacement magnitude depends on the excitation magnitude.[26,27,28,29,30,31,32]
It is proven that the larger the plaster layer thickness, the larger the interface shear stress amplitude excited by the ultrasonic transducer
Summary
In practice, some thin claddings are often accidentally adsorbed and/or burned on the structure surface, such as ice adsorption layers on the surface of wings and rotors, frost deposition layers on heat transfer plate, and sand burning layers on the surface of the casting, and others are actively coated on the structure surface, such as multiple coatings for metal cutting tools.[1,2] It has been proved by experiments that both the icing and frosting could be separated from structural surfaces by the mechanical effect of ultrasonic wave.[3,4] On the other hand, researchers have been plagued by coating peeling at certain frequency bands of the vibration.[5,6] Therefore, interface shear separation mechanism and prediction of cladding structures excited by horizontal shear waves should be studied in depth.The propagation theory of horizontal shear waves in cladding structures has always been one of the research hotspots of solid mechanics.[7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25] The displacement solution of a single cladding structure excited by horizontal shear waves was derived by the integral transformation method, and it was found that the displacement magnitude depends on the excitation magnitude.[26,27,28,29,30,31,32] The freely propagating solution of horizontal shear waves in Creative Commons CC BY: This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
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