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41 results on '"Petrucci, Roberto"'

3. Collection of Silicon Detectors Mechanical Properties from Static and Dynamic Characterization Test Campaigns

Author

Mancini, Edoardo, primary, Mussolin, Lorenzo, additional, Morettini, Giulia, additional, Palmieri, Massimiliano, additional, Ionica, Maria, additional, Silvestre, Gianluigi, additional, Cadoux, Franck, additional, Staffa, Agnese, additional, Ambrosi, Giovanni, additional, Cianetti, Filippo, additional, Braccesi, Claudio, additional, Farnesini, Lucio, additional, Caprai, Mirco, additional, Scolieri, Gianluca, additional, Petrucci, Roberto, additional, and Torre, Luigi, additional

Published
2023
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5. Enhanced Fracture Toughness of Nanostructured Carbon-Fiber Reinforced Poly(Urethane-Isocyanurate) Composites at Low Concentrations

Author

Chiacchiarelli, Leonel M., Petrucci, Roberto, and Torre, Luigi

Subjects
Polyurethanes -- Mechanical properties -- Testing, Carbon fibers -- Mechanical properties -- Testing, Reinforced plastics -- Mechanical properties -- Testing, Dynamic testing (Materials) -- Methods, Engineering and manufacturing industries, Science and technology
Abstract

Carbon fiber reinforced poly(urethane-isocyanurate)-nanosilica composites CF-(PUI-NS) were manufactured by means of the vacuum-assisted resin transfer moulding technique (VARTM) at very low NS concentrations (0-4 wt%). The high strain to failure of the PUI matrix (>7%) affected tensile tests by CF reorientation. Both the tensile strength and strain to failure were highly dependent on its kinematics. CF(PUI-NS) caused an increase of the static toughness with a maximum improvement of tensile strain to failure and modulus of +28.8% and +39% at 1 wt% and 2 wt% of NS, respectively. The interlaminar shear strength ([G.sub.IC]) of the composites showed both a deterioration of -12.9% and an improvement of +9.9% for NS concentrations of 1 wt% and 4 wt%, respectively. Regardless of the Gic value, all of the composites prepared with NS presented secondary maxima of the force versus displacement plots, indicating a substantial arrest of the crack propagation velocity after delamination started. Fractographic analysis revealed several features, such as fiber pull-out, bridging as well as river patterns whereas the composites prepared with NS behaved in a more ductile fashion due to the presence of river patterns and a reduced fiber pull-out., INTRODUCTION Concerns about the effect of carbon dioxide emissions on the earth atmosphere have led to more demanding regulations within the globalized automotive industry. Within the European Union (EU), regulations [...]

Published
2018
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6. Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends

Author

Tratzi, Patrizio, primary, Giuliani, Chiara, additional, Torre, Marco, additional, Tomassetti, Laura, additional, Petrucci, Roberto, additional, Iannoni, Antonio, additional, Torre, Luigi, additional, Genova, Salvatore, additional, Paolini, Valerio, additional, Petracchini, Francesco, additional, and Di Carlo, Gabriella, additional

Published
2021
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12. Valorization of Tilia sp. pruning waste as insulation material

Author

Grohmann, David, Menconi, MARIA ELENA, Petrucci, Roberto, Cioli, G., and Torre, Luigi

Subjects
by-product smart use, sustainable construction material, urban forestry, sustainable construction material, by-product smart use, urban forestry
Published
2017

13. Air-coupled ultrasonic inspection of composite materials for aerospace applications.

Author

Rizwan, Muhammad Khalid, Laureti, Stefano, Burrascano, Pietro, Petrucci, Roberto, Torre, Luigi, Hutchins, David, and Ricci, Marco

Subjects
COMPOSITE materials, SIGNAL-to-noise ratio, BANDWIDTHS, CARBON fiber-reinforced plastics, MEASUREMENT
Abstract

Inspection of carbon fiber reinforced polymers (CFRP) using air-coupled (AC) ultrasonic measurements is challenging due to the large acoustic mismatch of the material to air. The acquired signal-to-noise ratio (SNR) of measurement process is not enough to obtain the required sensitivity of inspection. Pulse compression (PuC) is applied together with other signal processing tools to overcome the problem of low SNR of the measurement process. In this work, a linear chirp signal is used to implement PuC for the AC ultrasonic inspection of a CFRP sample for the delamination identifications. It is shown that the defects are characterized with a good lateral and spatial resolution in C-Scan images obtained by exploiting both the time amplitude and phase parameters of the retrieved impulse response. The required sensitivity of inspection is achieved by optimizing time duration and bandwidth of the applied chirp signal in accordance with the measurement setup. [ABSTRACT FROM AUTHOR]

Published
2019
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32. Composites Based on Nanocomposite Matrices

Author

Monti, Marco, primary, Natali, Maurizio, additional, Petrucci, Roberto, additional, Puglia, Debora, additional, Terenzi, Andrea, additional, Valentini, Luca, additional, and Kenny, José Maria, additional

Published
2011
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