报告题目：Guided wave-based evaluation of elastic properties of laminate structures

报告时间：2025年5月21日，星期三，下午15:00-16:00PM

报告地点：龙赛理科楼南楼 519会议室

主讲人：Dr. Artem Eremin，Kuban State University, Krasnodar, Russia

摘要：

Non-destructive assessment of elastic properties of laminate structures might be motivated by various practical needs such as the demand for reliable input data for numerical simulation of their mechanical behaviour as well as for the quality control during their manufacturing, for the evaluation of material degradation during structure operation, etc. When propagating over thin-walled laminates, elastic guided waves (GWs) carry information about their material properties, i.e., elastic moduli, density, thickness of each sublayer, and lamination scheme. The latter could serve as a basis for their evaluation with modern ultrasonic NDT and SHM systems, especially in view of the achievements in non-contact and in-situ GW excitation and sensing using laser-based or piezoelectric emitters and receivers. As input data for such approaches, GW dispersion curves obtained experimentally are typically considered. In such case, determination of laminate elastic parameters is achieved via their variation to provide the minimum of certain goal functions that specify the discrepancies between the measured and calculated GW characteristics. 

The current talk attempts to give a certain insight into both theoretical and experimental aspects of how GWs could be employed for the evaluation of elastic properties of thin-walled laminates. It concentrates on the following topics:

- experimental procedures and data processing techniques for the evaluation of GW dispersion curves;

- analytically-based numerically stable approach for the calculation of GW dispersion curves and some remarks on the optimal goal function selection;

- results of case studies on isotropic and anisotropic laminates.

主讲人简介：

Artem Eremin is a leading researcher in Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar, Russia. He received his Specialist diploma and PhD degree from Kuban State University in 2008 and 2011, respectively. His research interests include numerical simulation and experimental investigation of elastic guided wave phenomena in thin-walled engineering structures for ultrasonic based non-destructive testing and structural health monitoring. In 2016-2018, Dr. Eremin held Humboldt Research Fellowship for postdocs in Helmut Schmidt University (Hamburg, Germany). In the year 2023, together with Prof. Natalia Glushkova he was awarded Krasnodar Region Administration Prize in the field of science and innovation. Dr. Eremin has published over 40 peer-reviewed journal articles. He serves as an editorial member of the Russian Journal of Biomechanics.