Massimo Ruzzene

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In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t The manuscript reports the outcome of investigations on the phononic(More)
Plane wave propagation in a chiral lattice is investigated through the application of Bloch's theorem. Two-dimensional dispersion relations are estimated and analyzed to illustrate peculiar properties of chiral or non-centrosymmetric configurations and investigate the directional behavior of wave propagation for varying geometric parameters. Special(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 simulate the natural frequencies and the acoustic wave propagation characteristics of graphene nanoribbons (GNRs) of the type (8,0) and (0,8) using an equivalent atomistic-continuum FE model previously developed by some of the authors, where the C-C bonds thickness and average equilibrium lengths during the dynamic loading are identified through the(More)
This paper investigates complex composite cellular structures featuring a chiral topology with the ability to undergo large overall displacements with limited straining of its components. Numerical analyses are performed to exploit such properties in the design of a morphing airfoil. The advantages associated with the use of composites are investigated by(More)
This paper presents an innovative wing profile featuring an internal truss-like structure of chiral topol-ogy. The chiral design is selected because of its unique deformation characteristics, which produce a theoretical, in-plane Poisson's ratio of −1. Such a Poisson's ratio yields a very high shear modulus, which in principle does not require the wing(More)
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)