Biography
Prof. Igor Solodov
Prof. Igor Solodov
Institute for Polymer Testing, University of Stuttgart, Germany
Title: Acoustics of resonant defects: a new approach to highly sensitive vibration-activated imaging of damage in composite materials
Abstract: 
The presence of a defect leads to a local decrease in rigidity for a certain mass of the material and therefore manifests in a particular characteristic frequency of the defect. A frequency match between the driving mechanical wave and this characteristic frequency provides a Local Defect Resonance (LDR) and results in efficient energy delivery to the defect. Unlike the resonance of an entire specimen, LDR identifies the damage by its resonant response clearly distinguished and independent of the rest (intact) part of the specimen. The objective of the paper is to demonstrate that the frequency- and spatially-selective activation of defects via the concept of LDR is the way to boost efficiency and sensitivity of diagnostic imaging of damage. Multiple case studies to be considered include resonant imaging of various defects in composite materials via laser vibrometry, vibro-thermosonics, and nonlinear acoustic techniques.
Biography: 
Igor Solodov received the M.Sc. degree in physics from M.V. Lomonosov Moscow State University, Moscow, Russia followed by a Ph.D. and D.Sci. degrees from Faculty of Physics MSU where he received a full Professor position at the Department of Acoustics. As a visiting scientist he worked at the University of California (Berkeley), Stanford University, University of Maryland (College Park), (USA), Nanjing University (China), and University of Windsor (Canada). Since 2003 he has joined the nondestructive testing (NDT) group at the University of Stuttgart (Germany). He published more than 250 papers in the fields of nonlinear acoustics of solids, non-classical acoustic nonlinearity of imperfect (cracked, granular, etc.) materials, nonlinear methods for material characterization and NDT, interface, surface, and plate elastic waves, air-coupled ultrasound in acoustic imaging, acoustics of composite materials.