Abstract:

The seminar will present the latest results on the implementation and application of plate-wave diffraction tomography for the reconstruction of flexural inhomogeneities in plates. All aspects of the numerical implementation of the fundamental reconstruction algorithm are investigated, viz. diffraction limited sensitivity, influence of source-receiver configurations and weak scatterer assumption, damage location and scatter field data processing in time and Fourier space. The feasibility of the imaging technique is investigated for cylindrical inhomogeneities of various severities and relative position within the interrogation space and a normal incident interrogation configuration. The results show that plate-wave diffraction tomography enables the quantitative reconstruction of location, size and severity of plate damage with excellent sensitivity and offers the potential for detecting corrosion thinning, disbonds and delamination damage in structural integrity management applications.

Biography:

Dr Veidt is Associate Professor in the School of Engineering at the University of Queensland in Brisbane, Australia. He has received a Dr sc techn (PhD) degree in 1991 from the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland. He has worked as a Swiss National Science Foundation postdoctoral fellow at Cornell University, Ithaca, NY in 1991 and 1992 and as a Research Scientist at the Swiss Federal Laboratories of Materials Testing and Research (EMPA) between 1993 and 1996.

Dr Veidt's most significant scientific contributions are in the area of materials and structural components characterisation using dynamic measurement techniques with a particular emphasis on structural wave ultrasonics, composite materials and biomedical engineering, addressing theoretical modelling as well as experimental implementation. He has published more than fourty five refereed journal papers on experimental and theoretical aspects in the areas of non-destructive evaluation, instrumented impact mechanics, fracture mechanics and biomedical engineering. He is a member of the Engineer�s Australia National Committee of Applied Mechanics and was the convenor of the 2004 ARC Research Network proposal for Structural Monitoring, Assessment and Rehabilitation using Frontier Technologies. He is currently chair of the organising committee for the 5th Australasian Congress on Applied Mechanics in December 2007.