Anna Castellano
Instituto Politécnico Nacional
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Publication
Featured researches published by Anna Castellano.
workshop on environmental energy and structural monitoring systems | 2016
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Francesco Paparella; Mario Daniele Piccioni
We present an innovative non-destructive approach based on the analysis of acoustoelastic effect for monitoring applied and residual stress in materials and structures. The proposed approach can be considered as base for a structures monitoring system. The analysis of the acoustoelastic effect for solid bodies, i.e., the correlation between the acoustic properties and the stress state, may be suitably exploited for experimental purposes. To this aim, relevant modeling and experimental issues should be overcome. Indeed, the usual theoretical framework of the acoustoelastic measurements is the so-called third-order elasticity, based on the use of the acoustoelastic coefficients, and requiring relatively simple experimental measurements. Here, by adopting an innovative ultrasonic setup, we investigate the capability of a theoretical model developed within the linearized elasticity, and used for describing the propagation of small amplitude waves in prestressed elastic materials. The results of the ultrasonic tests show that this approach in capable of accurate in situ stress measurements. The proposed experimental setup could be further investigated for monitoring applications of stress states in structures during their service life.
Key Engineering Materials | 2014
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Mario Daniele Piccioni
We characterize the elastic response of Apricena marble by using advanced ultrasonic nondestructive techniques. An innovative experimental device for ultrasonic immersion tests is employed for the determination of ultrasonic velocities of waves travelling into the sample for any angle of propagation. The interpretation of the experimental results within the theoretical framework of wave propagation in elastic materials allows for both the classification of the anisotropy and the determination of the elastic moduli.
workshop on environmental energy and structural monitoring systems | 2014
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Mario Daniele Piccioni
We apply an innovative experimental approach based on ultrasonic immersion tests for the characterization of the elastic response of a multi-layered anisotropic GFRP composite. The good agreement between the results of the nondestructive measurements and the results of standard destructive mechanical tests shows the effectiveness of the proposed experimental setup. Moreover, the accuracy of the ultrasonic test allows for the identification of the layer of the composite specimen: this can be very useful in view of the characterization of micro-cracks, damage and delamination.
Key Engineering Materials | 2014
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Gemma Mininno; Mario Daniele Piccioni
We study the implementation of Stable Unbonded Fiber-Reinforced Elastomeric Isolators (SU-FREI) for the seismic protection of a typical historical masonry construction from Puglia. The effectiveness of this innovative isolation technique is analyzed by means of a non-linear dynamic analysis, which shows substantial improvements of the seismic response with respect to the corresponding fixed base construction.
workshop on environmental energy and structural monitoring systems | 2017
Mariella Diaferio; Aguinaldo Fraddosio; Mario Daniele Piccioni; Anna Castellano; Luigi Mangialardi; Leonardo Soria
Operational Modal Analysis (OMA) is extensively used as a tool for the modal identification and the Structural Health Monitoring (SHM) of civil constructions. However, the classical experimental techniques based on the use of accelerometers involve high costs and long times for performing the measurements, and often interrupting the service of the construction is also needed. In this paper, with reference to the specific case study of the identification of modal parameters of a typical span of a railway viaduct, we analyze the capability and the possible improvements of the ground based radar interferometric experimental set-up. This analysis is aimed at developing a fast, inexpensive and practical procedure for the periodic monitoring of the viaduct.
Fracture and Structural Integrity | 2014
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Mario Daniele Piccioni
We illustrate a procedure based on the Magnus expansion for studying mechanical problems which lead to non-autonomous systems of linear ODE’s. The effectiveness of the Magnus method is enlighten by the analysis of a bifurcation problem in the framework of three-dimensional non-linear elasticity. In particular, for an isotropic compressible elastic tube subject to an azimuthal shear primary deformation we study the possibility of axially periodic twist-like bifurcations. The approximate matricant of the resulting differential problem and the first singular value of the bifurcating load corresponding to a non-trivial bifurcation are determined by employing a simplified version of the Magnus method, characterized by a truncation of the Magnus series after the second term.
Composites Part B-engineering | 2014
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Mario Daniele Piccioni
Composites Part B-engineering | 2017
Anna Castellano; Aguinaldo Fraddosio; Mario Daniele Piccioni
Procedia Engineering | 2015
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Umberto Galietti; Salvatore Marzano; Mario Daniele Piccioni
Research on Engineering Structures and Materials | 2017
Anna Castellano; Pilade Foti; Aguinaldo Fraddosio; Salvatore Marzano; Mario Daniele Piccioni