报告人：Professor Tribikram Kundu
Professor of Civil and Architectural Engineering and Mechanics
Professor, Aerospace & Mechanical Engineering, courtesy appointment
Professor of Materials Science and Engineering, courtesy appointment
University of Arizona, Tucson, Arizona 85721, USA
报告题目：Recent developments in Non-destructive Testing and Structural Health Monitoring Technology
报告摘要：This presentation will cover the research carried out by the speaker over the last three decades on structural health monitoring and non-destructive evaluation techniques for engineering and biological materials. In particular, it will focus on acoustic source localization (ASL) and damage detection techniques using linear and nonlinear ultrasonic techniques. Both linear and nonlinear techniques are needed for monitoring damages in materials and structures at various stages of their formation using different scales - from microscopic fatigue cracks and dislocations to large scale cracks in metals, composites and concrete structures. The nonlinear ultrasonic method called Sideband Peak Count–Index (or SPC-I) technique developed by the speaker in collaboration with his colleagues, will be discussed in detail, and advantages of this technique over conventional linear and nonlinear ultrasonic techniques such as ultrasonic pulse velocity, attenuation measurement and higher harmonic techniques will be demonstrated. A new ASL technique that does not require the knowledge of material properties will be also discussed. In addition to the experimental investigation the mesh-free modelling technique called distributed point source method (DPSM) developed by the speaker and his colleagues for solving elastic and electromagnetic wave propagation problems will be presented. Advantages of all these newly developed techniques - DPSM, SPC-I and the new ASL technique for nondestructive testing and structural health monitoring applications will be highlighted in this presentation.