Massimo Ruzzene

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Dedicated to my step father (deceased) who did say I should go and do something big and believed in me. To my long time friend Arlene (deceased) who also encouraged me. Still have your text message! To all past teachers, and the glory of God. ACKNOWLEDGEMENTS This acknowledgement is going to be long. First I would like to thank our Lord and Savior Jesus(More)
Structural health monitoring systems employing embedded guided wave transducers are being considered for aerospace applications. If these systems detect changes that are potentially caused by damage, rapid follow-up inspection is desirable; however, the suspected damage location may be inaccessible. A method is proposed whereby one or more of the embedded(More)
Full acoustic wavefield data were acquired from an aluminum plate with various structural discontinuities and artificial defects using an air-coupled transducer mounted on a scanning stage. Piezoelectric transducers permanently mounted on the specimen were used as wave sources. These source transducers were elements of a permanently attached sparse array. A(More)
Full wavefield measurements of guided waves in a structure provide a wealth of information that can be effectively used for the identification, localization and quantification of damage. Full field measurements can be obtained using an air-coupled transducer mounted on a scanning stage, or via a scanning laser vibrometer. The resulting detailed temporal and(More)
We report on a Digital Image Correlation-based technique for the detection of in-plane elastic waves propagating in structural lattices. The experimental characterization of wave motion in lattice structures is currently of great interest due its relevance to the design of novel mechanical metamaterials with unique/unusual properties such as strongly(More)
iii ACKNOWLEDGEMENTS I found writing this section to be the most difficult of all the chapters of my dissertation. All along, I have been trained to be logical and analytical, but it is difficult to do the same here. There are no precise parameters, no theoretical formulations which would give closed form or even approximate solutions, by which I can(More)
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The development of effective damage imaging and characterization tools is a challenging task because of the dispersive and multi-modal nature of Lamb waves. An additional problem is the need for baseline data that is required by a number of existing techniques. This paper presents the development of imaging algorithms applied to filtered wavefield data(More)