The aim of the project is the development of novel non?contact ultrasound methods for the investigation of the properties of sheet composite structures. The object of the planned research is sheet composite structures developed by employing various innovative materials (nanostructures, mica structures, etc.) used in various fields of industry. The exceptional physical properties of these materials and the nature of the production technologies do not allow using contact methods for their quality control. The traditional non?contact ultrasound research methods employed in the research of the properties of paper are based on the generation of guided waves in film structures. The speed of propagation of guided waves in the sheet structures explored in the project theoretically may be lower than the speed of the propagation of these waves in the air. The methods of transmitting and receiving of such slow guided waves are innovative, only low?scale research has been undertaken previously; hence, the features of the propagation of these waves in sheet composite structures are essentially unknown. The project endeavours to explore the methods of non?contact excitement and reception methods of slow guided ultrasonic waves, to develop new?type piezoelectric transducers for the generation of these waves and to conduct experimental research of the properties of sheet composite structures by employing the non?contact method. In the course of the research, it is expected to develop a methodology of the measurement of sheet material parameters, to optimize the parameters of non?contact ultrasonic transducers in the modes of transmitting and receiving, and to conduct experimental measurements of the parameters of sheet composite structures.
Projects funded by the Research Council of Lithuania (RCL), Projects carried out by researchers’ teams
Scientific article – 3 units.
Period of project implementation: 2017-09-01 - 2020-09-30
Project coordinator: Kaunas University of Technology