Analysis of the influence of sample surface roughness on non-metallic dry coupled piezoelectric ultrasound
Source abstract
Abstract
The propagation law of ultrasonic signals in the piezoelectric chip coupling layer workpiece system was investigated to address the problem of surface coupling of pressure bearing pipe roughness in long-term online monitoring using piezoelectric ultrasound.The influence of three non-metallic coupling materials, namely silicone film, glass adhesive, and high-performance epoxy structural adhesive, on ultrasonic propagation on specimens with different roughness was revealed. Based on the coupling characteristics of different state coupling agents, solid coupling agents and liquid-solid conversion coupling agents were proposed as dry coupling materials.The results showed that within the range of Ra = 1.6 µm-Ra = 12.5 µm, as the roughness increased, the ultrasonic amplitude of high-performance epoxy structural adhesive changed very little, and the coupling effect was the best. The ultrasonic amplitude of the silicone sheet gradually decreases with the prolongation of time, and the coupling effect gradually decreases.Therefore, high-performance epoxy structural adhesive can be stably used for on-site online monitoring for a long time, while silicone film has the greatest interference on the propagation of piezoelectric ultrasound and is not suitable for on-site monitoring. This study laid the theoretical foundation for dry coupling in ultrasonic online monitoring of metal loss.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adhesion, Friction, and Surface Interactions · Surface Roughness and Optical Measurements · Tribology and Lubrication Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chuanqing Drilling Engineering Co., Ltd
Sichuan University
Funding
National Key R&D Program of China · Sichuan Science and Technology Plan Project · key project of CNPC
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