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Pietro Russo
Institute for Polymers, Composites, and Biomaterials National Council of Research Pozzuoli (NA) Italy

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Research article
Published: 09 June 2021 in Polymer Composites
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Low-velocity impacts can severely jeopardize the structural reliability of polymer composites. In view of this, the present work provides a thorough overview of the impact response of polypropylene (PP) composites reinforced with an ecofriendly intraply flax/basalt hybrid fabric, assessing the effect of different parameters: energy level, temperature, and number of impacts. Indeed, high-energy single impacts are as dangerous as low-energy repeated impacts for the structural integrity of laminates. Moreover, considering the poor interfacial adhesion between hydrophobic polyolefin matrices and hydrophilic vegetable fibers, the effect of a maleic anhydride coupling agent was evaluated. A detrimental effect of coupling agent on composites impact response was observed, determining a reduction of the impact life (impacts to failure from 83 to 63 at 10 J and from 30 to 9 at 15 J) because several energy dissipation mechanisms were prevented. Decreasing temperatures (−40°C) caused an embrittlement effect on neat PP composites with an increase between 7.3% and 20.3% of maximum force and a decrease between 7.5% and 10.9% of maximum displacement, whereas increasing temperatures (80°C) led to a softening of compatibilized composites with a decrease between 13.8% and 27.5% of maximum force and an increase between 28.1% and 34.4% of maximum displacement.

ACS Style

Luca Ferrante; Claudia Sergi; Jacopo Tirillò; Pietro Russo; Andrea Calzolari; Fabrizio Sarasini. Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites. Polymer Composites 2021, 1 .

AMA Style

Luca Ferrante, Claudia Sergi, Jacopo Tirillò, Pietro Russo, Andrea Calzolari, Fabrizio Sarasini. Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites. Polymer Composites. 2021; ():1.

Chicago/Turabian Style

Luca Ferrante; Claudia Sergi; Jacopo Tirillò; Pietro Russo; Andrea Calzolari; Fabrizio Sarasini. 2021. "Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites." Polymer Composites , no. : 1.

Journal article
Published: 13 April 2021 in Journal of Engineering Materials and Technology
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The effects of a coupling agent on the behavior of flax fiber-reinforced composites have been investigated by testing the specimens under both quasi-static (QS) indentation and high-velocity impact loading. The specimens are manufactured embedding a commercial flax fiber fabric in a polypropylene (PP) matrix, neat and premodified with a maleic anhydride-grafted PP, the latter acting as a coupling agent to enhance the interfacial adhesion. QS compressive tests were performed using a dynamometer testing machine equipped with a high-density polyethylene indenter having the same geometry of the projectile employed in the impact tests. The impact tests were conducted setting three different impact velocities. Digital image correlation maps of out-of-plane displacement were employed to compare the specimens with and without the coupling agent. The QS testing results indicate that the coupling agent has an enhancing influence on the bending stiffness of tested flax composites. The testing results show that the coupling agent improves the mechanical behavior by decreasing the out-of-plane displacement under impact loading. This approach gives rise to new materials potentially useful for applications where impact performance is desired while also providing an opportunity for the incorporation of natural fibers to produce a lightweight composite.

ACS Style

Cihan Kaboglu; Jun Liu; Haibao Liu; Pietro Russo; Giorgio Simeoli; Valentina Lopresto; John P. Dear; Chris Maharaj. The Effect of a Coupling Agent on the Impact Behavior of Flax Fiber Composites. Journal of Engineering Materials and Technology 2021, 143, 1 -17.

AMA Style

Cihan Kaboglu, Jun Liu, Haibao Liu, Pietro Russo, Giorgio Simeoli, Valentina Lopresto, John P. Dear, Chris Maharaj. The Effect of a Coupling Agent on the Impact Behavior of Flax Fiber Composites. Journal of Engineering Materials and Technology. 2021; 143 (3):1-17.

Chicago/Turabian Style

Cihan Kaboglu; Jun Liu; Haibao Liu; Pietro Russo; Giorgio Simeoli; Valentina Lopresto; John P. Dear; Chris Maharaj. 2021. "The Effect of a Coupling Agent on the Impact Behavior of Flax Fiber Composites." Journal of Engineering Materials and Technology 143, no. 3: 1-17.

Research article
Published: 06 March 2021 in Polymer Composites
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Thermally conductive but electrically insulating polymer matrix composites are of great interest in many engineering applications such as thermal management applications (i.e., heat sinks in microelectronic packaging, cooling of mechatronic components and mechanisms). Among possible functional fillers, hexagonal boron nitride seems to be one of the most promising choice due to its high thermal conductivity, and in this work, it was used as filler of polyamide 6 matrix. The resulting composites were first prepared in the form of pellets, extruded into filaments, and successively 3D printed, with the aim to study and compare the thermal performances of the 3D printed samples to the ones manufactured using traditional compression molding technique. The thermal conductivity of 25% wt and 45% wt loaded compression molded samples were 1 and 2.5 W/mK, respectively, while the neat polymer showed a thermal conductivity of 0.29 W/mK. 3D printed samples showed the same trend, namely increasing thermal conductivity with filler amount, despite a great influence of the 3D printing processing parameters (i.e., melt rheology and printing temperature), which lower the resulting thermal conductivity. 3D printed 25% and 45% by weight loaded samples showed a through plane thermal conductivity of 0.67 and 0.92 W/mK, respectively, and in‐plane thermal conductivity of 0.96 and 1.52 W/mK due to the presence of porosity and filler alignment along the printing direction.

ACS Style

Mario Bragaglia; Francesca R. Lamastra; Pietro Russo; Libera Vitiello; Marianna Rinaldi; Francesco Fabbrocino; Francesca Nanni. A comparison of thermally conductive polyamide 6‐boron nitride composites produced via additive layer manufacturing and compression molding. Polymer Composites 2021, 42, 2751 -2765.

AMA Style

Mario Bragaglia, Francesca R. Lamastra, Pietro Russo, Libera Vitiello, Marianna Rinaldi, Francesco Fabbrocino, Francesca Nanni. A comparison of thermally conductive polyamide 6‐boron nitride composites produced via additive layer manufacturing and compression molding. Polymer Composites. 2021; 42 (6):2751-2765.

Chicago/Turabian Style

Mario Bragaglia; Francesca R. Lamastra; Pietro Russo; Libera Vitiello; Marianna Rinaldi; Francesco Fabbrocino; Francesca Nanni. 2021. "A comparison of thermally conductive polyamide 6‐boron nitride composites produced via additive layer manufacturing and compression molding." Polymer Composites 42, no. 6: 2751-2765.

Journal article
Published: 01 February 2021 in Biomolecules
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The composites based on basalt fibres and poly(lactic acid) (PLA) show promising applications in biomedical and automotive fields, but their mechanical performance is still largely hindered by poor interfacial properties. Zinc oxide nanorods have been successfully used to tune the PLA/basalt fibre interface by growing them on commercially available basalt fabrics. The hierarchical fibres significantly enhanced the mechanical properties of PLA-based composites, especially their flexural strength and stiffness. These values are 26% and 22% higher than those of unmodified basalt/PLA composites, and 24% and 34% higher than those of glass/PLA composites used as a baseline. The increase in tensile and flexural properties hinges on the mechanical interlocking action promoted by ZnO nanorods and on the creation of a compact transcrystallinity structure. A degradation of PLA matrix was detected but it was positively counteracted by the better interfacial stress transfer. This study offers a novel approach for modifying the fibre–matrix interface of biocomposites intended for high-performance applications.

ACS Style

Francesca Sbardella; Andrea Martinelli; Valerio Di Lisio; Irene Bavasso; Pietro Russo; Jacopo Tirillò; Fabrizio Sarasini. Surface Modification of Basalt Fibres with ZnO Nanorods and Its Effect on Thermal and Mechanical Properties of PLA-Based Composites. Biomolecules 2021, 11, 200 .

AMA Style

Francesca Sbardella, Andrea Martinelli, Valerio Di Lisio, Irene Bavasso, Pietro Russo, Jacopo Tirillò, Fabrizio Sarasini. Surface Modification of Basalt Fibres with ZnO Nanorods and Its Effect on Thermal and Mechanical Properties of PLA-Based Composites. Biomolecules. 2021; 11 (2):200.

Chicago/Turabian Style

Francesca Sbardella; Andrea Martinelli; Valerio Di Lisio; Irene Bavasso; Pietro Russo; Jacopo Tirillò; Fabrizio Sarasini. 2021. "Surface Modification of Basalt Fibres with ZnO Nanorods and Its Effect on Thermal and Mechanical Properties of PLA-Based Composites." Biomolecules 11, no. 2: 200.

Short communication
Published: 09 December 2020 in Manufacturing Letters
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Mass reduction and performance improvement have been resulting in manufacturing of components by new materials. The joint selection is a challenge, even more relevant if polymers and metals are combined. In literature, new solutions have been proposed to innovate various joining categories. Herein, the friction stir forming was employed to connect pure aluminium and PEEK sheets. Specifically, fasteners are formed on the metallic sheet plunging a rotating non-consumable tool into it. The process feasibility was achieved placing a thin layer of glass fibre reinforced polymer between the two plates shielding the plastic from thermal degradation. The effects of some process parameters, i.e. linear velocity and mandrel rotational speed, were analysed. The size and the shape of the extruded pins were evaluated and microscopic observations were performed to examine the morphology of the joined surfaces.

ACS Style

Francesco Gagliardi; Giuseppina Ambrogio; Romina Conte; Pietro Russo. Investigation of friction stir forming for mechanical interlocking high-performance polymers and aluminium sheets. Manufacturing Letters 2020, 27, 31 -38.

AMA Style

Francesco Gagliardi, Giuseppina Ambrogio, Romina Conte, Pietro Russo. Investigation of friction stir forming for mechanical interlocking high-performance polymers and aluminium sheets. Manufacturing Letters. 2020; 27 ():31-38.

Chicago/Turabian Style

Francesco Gagliardi; Giuseppina Ambrogio; Romina Conte; Pietro Russo. 2020. "Investigation of friction stir forming for mechanical interlocking high-performance polymers and aluminium sheets." Manufacturing Letters 27, no. : 31-38.

Journal article
Published: 29 June 2020 in Materials
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This research investigates the preparation and characterization of new organic–inorganic geopolymeric foams obtained by simultaneously reacting coal fly ash and an alkali silicate solution with polysiloxane oligomers. Foaming was realized in situ using Si0 as a blowing agent. Samples with density ranging from 0.3 to 0.7 g/cm3 that show good mechanical properties (with compressive strength up to ≈5 MPa for a density of 0.7 g/cm3) along with thermal performances (λ = 0.145 ±0.001 W/m·K for the foamed sample with density 0.330 g/cm3) comparable to commercial lightweight materials used in the field of thermal insulation were prepared. Since these foams were obtained by valorizing waste byproducts, they could be considered as low environmental impact materials and, hence, with promising perspectives towards the circular economy.

ACS Style

Giuseppina Roviello; Laura Ricciotti; Antonio Jacopo Molino; Costantino Menna; Claudio Ferone; Domenico Asprone; Raffaele Cioffi; Veronica Ferrandiz-Mas; Pietro Russo; Oreste Tarallo. Hybrid Fly Ash-based Geopolymeric Foams: Microstructural, Thermal and Mechanical Properties. Materials 2020, 13, 2919 .

AMA Style

Giuseppina Roviello, Laura Ricciotti, Antonio Jacopo Molino, Costantino Menna, Claudio Ferone, Domenico Asprone, Raffaele Cioffi, Veronica Ferrandiz-Mas, Pietro Russo, Oreste Tarallo. Hybrid Fly Ash-based Geopolymeric Foams: Microstructural, Thermal and Mechanical Properties. Materials. 2020; 13 (13):2919.

Chicago/Turabian Style

Giuseppina Roviello; Laura Ricciotti; Antonio Jacopo Molino; Costantino Menna; Claudio Ferone; Domenico Asprone; Raffaele Cioffi; Veronica Ferrandiz-Mas; Pietro Russo; Oreste Tarallo. 2020. "Hybrid Fly Ash-based Geopolymeric Foams: Microstructural, Thermal and Mechanical Properties." Materials 13, no. 13: 2919.

Journal article
Published: 08 May 2020 in Polymers
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Recently, the growing interests into the environmental matter are driving the research interest to the development of new eco-sustainable composite materials toward the replacement of synthetic reinforcing fibers with natural ones and exploiting the intrinsic recyclability of thermoplastic resins even for uses in which thermosetting matrices are well consolidated (e.g., naval and aeronautical fields). In this work, polypropylene/basalt fabric composite samples were prepared by film stacking and compression molding procedures. They have been studied in terms of flexural and low-velocity impact behavior. The influence related to the matrix modification with a pre-optimized amount of maleic anhydride grafted PP as coupling agent was studied. The mechanical performances of the composite systems were compared with those of laminates consisting of the pure matrix and obtained by hot-pressing of PP pellets and PP films used in the stacking procedure. Results, on one side, demonstrated a slight reduction of both static and dynamic parameters at the break for specimens from superimposed films to ones prepared from PP pellets. Moreover, an outstanding improvement of mechanical performances was shown in the presence of basalt layers, especially for compatibilized samples.

ACS Style

Pietro Russo; Ilaria Papa; Vito Pagliarulo; Valentina LoPresto. Polypropylene/Basalt Fabric Laminates: Flexural Properties and Impact Damage Behavior. Polymers 2020, 12, 1079 .

AMA Style

Pietro Russo, Ilaria Papa, Vito Pagliarulo, Valentina LoPresto. Polypropylene/Basalt Fabric Laminates: Flexural Properties and Impact Damage Behavior. Polymers. 2020; 12 (5):1079.

Chicago/Turabian Style

Pietro Russo; Ilaria Papa; Vito Pagliarulo; Valentina LoPresto. 2020. "Polypropylene/Basalt Fabric Laminates: Flexural Properties and Impact Damage Behavior." Polymers 12, no. 5: 1079.

Journal article
Published: 25 January 2020 in Nanomaterials
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One of the main issues in preparing polymer-based nanocomposites with effective properties is to achieve a good dispersion of the nanoparticles into the matrix. Chemical interfacial modifications by specific coupling agents represents a good way to reach this objective. Actually, time consuming compatibilization procedures strongly compromise the sustainability of these strategies. In this study, the role of particles’ architectures in their dispersion into a poly-lactic acid matrix and their subsequent influences on physical-chemical properties of the obtained nanocomposites were investigated. Two kinds of silica nanoparticles, “smooth” and “wrinkled,” with different surface areas (≈30 and ≈600 m2/g respectively) were synthesized through a modified Stöber method and used, without any chemical surface pre-treatments, as fillers to produce poly-lactic acid based nanocomposites. The key role played by wrinkled texture in modifying the physical interaction at the polymer-filler interface and in driving composite properties, was investigated and reflected in the final bulk properties. Detailed investigations revealed the presence of wrinkled nanoparticles, leading to (i) an enormous increase of the chain relaxation time, by almost 30 times compared to the neat PLA matrix; (ii) intensification of the shear-thinning behavior at low shear-rates; and (iii) slightly slower thermal degradation of polylactic acid.

ACS Style

Pietro Russo; Virginia Venezia; Fabiana Tescione; Joshua Avossa; Giuseppina Luciani; Brigida Silvestri; Aniello Costantini. Improving Interaction at Polymer–Filler Interface: The Efficacy of Wrinkle Texture. Nanomaterials 2020, 10, 208 .

AMA Style

Pietro Russo, Virginia Venezia, Fabiana Tescione, Joshua Avossa, Giuseppina Luciani, Brigida Silvestri, Aniello Costantini. Improving Interaction at Polymer–Filler Interface: The Efficacy of Wrinkle Texture. Nanomaterials. 2020; 10 (2):208.

Chicago/Turabian Style

Pietro Russo; Virginia Venezia; Fabiana Tescione; Joshua Avossa; Giuseppina Luciani; Brigida Silvestri; Aniello Costantini. 2020. "Improving Interaction at Polymer–Filler Interface: The Efficacy of Wrinkle Texture." Nanomaterials 10, no. 2: 208.

Journal article
Published: 26 July 2019 in Applied Sciences
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Basalt fibers are receiving increasing consideration because they seem to be adequate as reinforcement of composites and to comply with the environmental safeguard rules. However, many factors affect the performance of composite material, demanding specific testing; one may be performance assessment under impact tests. The attention of the present work is focused on the detection of impact damage in basalt-based composites with two non-destructive testing techniques: lock-in thermography (LT) and ultrasonic testing (UT). Two different types of materials are considered which both include basalt fibers as reinforcement but two different matrices: Polyamide and polypropylene. Polypropylene is used either pure or modified with the addition of a coupling agent; the latter improves the fiber/matrix interface strength, giving in practice, a material of different characteristics. Specimens are first subjected to low-velocity impact tests and then non-destructively examined with the two above mentioned techniques. The obtained results are analyzed and compared to highlight the advantages and limitations of the two techniques to detect impact damage in basalt-based composites. Both techniques seem effective for the inspection of polyamide/basalt composite; in particular, there is a general agreement between results. Conversely, UT seems not suitable for the inspection of polypropylene/basalt composites because of their superficial porosity, while lock-in thermography is effective also for this type of composite material.

ACS Style

Simone Boccardi; Natalino Daniele Boffa; Giovanni Maria Carlomagno; Giuseppe Del Core; Carosena Meola; Ernesto Monaco; Pietro Russo; Giorgio Simeoli; Core. Lock-In Thermography and Ultrasonic Testing of Impacted Basalt Fibers Reinforced Thermoplastic Matrix Composites. Applied Sciences 2019, 9, 3025 .

AMA Style

Simone Boccardi, Natalino Daniele Boffa, Giovanni Maria Carlomagno, Giuseppe Del Core, Carosena Meola, Ernesto Monaco, Pietro Russo, Giorgio Simeoli, Core. Lock-In Thermography and Ultrasonic Testing of Impacted Basalt Fibers Reinforced Thermoplastic Matrix Composites. Applied Sciences. 2019; 9 (15):3025.

Chicago/Turabian Style

Simone Boccardi; Natalino Daniele Boffa; Giovanni Maria Carlomagno; Giuseppe Del Core; Carosena Meola; Ernesto Monaco; Pietro Russo; Giorgio Simeoli; Core. 2019. "Lock-In Thermography and Ultrasonic Testing of Impacted Basalt Fibers Reinforced Thermoplastic Matrix Composites." Applied Sciences 9, no. 15: 3025.

Journal article
Published: 13 June 2019 in Composites Part B: Engineering
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Thanks to its remote operation through thermal radiation sensing, infrared thermography has proved suitability for inline monitoring of thermal effects coupled with mechanical stresses. The attention of this work is focused on the contribution of infrared thermography in the characterization of glass fibres-based composites undergoing either very rapid, or very slow, bending under mechanical tests. Several specimens with glass fibres embedded in either a thermoset or a thermoplastic matrix are prepared and are subjected to both impact and quasi-static bending, tests. An infrared camera views the specimen surface when it is under load and records sequences of images at a proper frame rate. The acquired sequences are later post-processed and analysed. For both types of test, infrared thermography allows getting information about damage initiation and propagation and in particular about the impactor peak force and contact duration. These pieces of information, which are attained in a remote way, so without any contact with the part under investigation and without any interference with the test execution, could contribute to increase knowledge of the undergoing phenomena. The presented results are also analysed with a critical view on the selection of the infrared camera to be used for the specific test both in terms of detector resolution and frame rate.

ACS Style

S. Boccardi; G.M. Carlomagno; C. Meola; P. Russo; G. Simeoli. Remote inline monitoring of thermal effects coupled with bending stresses of glass fibres composites. Composites Part B: Engineering 2019, 174, 107042 .

AMA Style

S. Boccardi, G.M. Carlomagno, C. Meola, P. Russo, G. Simeoli. Remote inline monitoring of thermal effects coupled with bending stresses of glass fibres composites. Composites Part B: Engineering. 2019; 174 ():107042.

Chicago/Turabian Style

S. Boccardi; G.M. Carlomagno; C. Meola; P. Russo; G. Simeoli. 2019. "Remote inline monitoring of thermal effects coupled with bending stresses of glass fibres composites." Composites Part B: Engineering 174, no. : 107042.

Journal article
Published: 07 May 2019 in Composite Structures
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Thermoplastic fiber metal laminates (TFMLs) represent a relatively new class of fiber metal laminates (FMLs) specifically designed to overcome the limitations of conventional fiber metal laminates in terms of the elevated processing temperatures and pressures required for their consolidation. In this work the low velocity impact response of TFMLs based on aluminum alloy and a polypropylene (PP) matrix reinforced with basalt fibers has been experimentally addressed, by considering the effect of the stacking sequence and of the impact temperature. The results have been compared with those obtained on glass fiber/PP reinforced FMLs, basalt/epoxy reinforced FMLs and monolithic aluminum. Basalt TFMLs showed a better performance than aluminum plates, basalt/epoxy TFMLs and glass TFMLs, especially for the specific energy level causing FC (first crack), with an increase of 42%, 34%, 8.5% respectively due to a greater deformation ability of basalt fiber metal laminates even at an impact temperature as low as -40 °C.

ACS Style

Fabrizio Sarasini; Jacopo Tirillò; Luca Ferrante; Claudia Sergi; Francesca Sbardella; Pietro Russo; Giorgio Simeoli; David Mellier; Andrea Calzolari. Effect of temperature and fiber type on impact behavior of thermoplastic fiber metal laminates. Composite Structures 2019, 223, 110961 .

AMA Style

Fabrizio Sarasini, Jacopo Tirillò, Luca Ferrante, Claudia Sergi, Francesca Sbardella, Pietro Russo, Giorgio Simeoli, David Mellier, Andrea Calzolari. Effect of temperature and fiber type on impact behavior of thermoplastic fiber metal laminates. Composite Structures. 2019; 223 ():110961.

Chicago/Turabian Style

Fabrizio Sarasini; Jacopo Tirillò; Luca Ferrante; Claudia Sergi; Francesca Sbardella; Pietro Russo; Giorgio Simeoli; David Mellier; Andrea Calzolari. 2019. "Effect of temperature and fiber type on impact behavior of thermoplastic fiber metal laminates." Composite Structures 223, no. : 110961.

Journal article
Published: 06 May 2019 in Fibers
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Intraply hybrid green composites were prepared by film stacking and hot-pressing of bio-based polyamide 11 (PA11) sheets and commercial hybrid fabrics made by interweaving flax and basalt fibers (2/2 twill structure). Two matrices were considered, one of them containing a plasticizing agent. After preliminary thermal and rheological characterizations of the neat matrices, the laminates were studied in terms of flexural properties at low and high deformation rates, and the results were interpreted in the light of morphological analyses (scanning electron and optical microscopy). Despite the poor interfacial adhesion detected for all investigated composite samples, the latter exhibited a good combination of flexural strength, modulus, and impact resistance. Such well-balanced mechanical properties make the studied samples potential candidates for semi-structural applications, e.g., in the transportation sector.

ACS Style

Pietro Russo; Giorgio Simeoli; Libera Vitiello; Giovanni Filippone. Bio-Polyamide 11 Hybrid Composites Reinforced with Basalt/Flax Interwoven Fibers: A Tough Green Composite for Semi-Structural Applications. Fibers 2019, 7, 41 .

AMA Style

Pietro Russo, Giorgio Simeoli, Libera Vitiello, Giovanni Filippone. Bio-Polyamide 11 Hybrid Composites Reinforced with Basalt/Flax Interwoven Fibers: A Tough Green Composite for Semi-Structural Applications. Fibers. 2019; 7 (5):41.

Chicago/Turabian Style

Pietro Russo; Giorgio Simeoli; Libera Vitiello; Giovanni Filippone. 2019. "Bio-Polyamide 11 Hybrid Composites Reinforced with Basalt/Flax Interwoven Fibers: A Tough Green Composite for Semi-Structural Applications." Fibers 7, no. 5: 41.

Article
Published: 15 April 2019 in Journal of Materials Engineering and Performance
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Composite laminates reinforced by woven basalt fibers and based on different polymer matrices were prepared and mechanically characterized, in static and dynamic conditions, to compare the results and evaluate the influence of the matrix type. In this regard, a thermoplastic resin, polyamide 6 (PA6), and two thermosetting matrices, vinyl ester and epoxy grades, commonly used for high-performance applications, were considered. Indentation depth measurements carried out by a confocal microscope and ultrasound analyses performed on specimens subjected to falling dart tests at levels of impact energies lower than the perforation one permitted to evaluate the extent of plastic deformations and of subjected delaminations, respectively. These data have provided useful information about the involved damage mechanisms and highlighted interesting perspective of use for the eco-friendly thermoplastic sample.

ACS Style

P. Russo; G. Simeoli; F. Cimino; I. Papa; M. R. Ricciardi; Valentina Lopresto. Impact Damage Behavior of Vinyl Ester-, Epoxy-, and Nylon 6-Based Basalt Fiber Composites. Journal of Materials Engineering and Performance 2019, 28, 3256 -3266.

AMA Style

P. Russo, G. Simeoli, F. Cimino, I. Papa, M. R. Ricciardi, Valentina Lopresto. Impact Damage Behavior of Vinyl Ester-, Epoxy-, and Nylon 6-Based Basalt Fiber Composites. Journal of Materials Engineering and Performance. 2019; 28 (6):3256-3266.

Chicago/Turabian Style

P. Russo; G. Simeoli; F. Cimino; I. Papa; M. R. Ricciardi; Valentina Lopresto. 2019. "Impact Damage Behavior of Vinyl Ester-, Epoxy-, and Nylon 6-Based Basalt Fiber Composites." Journal of Materials Engineering and Performance 28, no. 6: 3256-3266.

Journal article
Published: 22 March 2019 in Fibers
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In an attempt to increase the low-velocity impact response of natural fiber composites, a new hybrid intraply woven fabric based on flax and basalt fibers has been used to manufacture laminates with both thermoplastic and thermoset matrices. The matrix type (epoxy or polypropylene (PP) with or without a maleated coupling agent) significantly affected the absorbed energy and the damage mechanisms. The absorbed energy at perforation for PP-based composites was 90% and 50% higher than that of epoxy and compatibilized PP composites, respectively. The hybrid fiber architecture counteracted the influence of low transverse strength of flax fibers on impact response, irrespective of the matrix type. In thermoplastic laminates, the matrix plasticization delayed the onset of major damage during impact and allowed a better balance of quasi-static properties, energy absorption, peak force, and perforation energy compared to epoxy-based composites.

ACS Style

Fabrizio Sarasini; Jacopo Tirillò; Luca Ferrante; Claudia Sergi; Pietro Russo; Giorgio Simeoli; Francesca Cimino; Maria Rosaria Ricciardi; Vincenza Antonucci. Quasi-Static and Low-Velocity Impact Behavior of Intraply Hybrid Flax/Basalt Composites. Fibers 2019, 7, 26 .

AMA Style

Fabrizio Sarasini, Jacopo Tirillò, Luca Ferrante, Claudia Sergi, Pietro Russo, Giorgio Simeoli, Francesca Cimino, Maria Rosaria Ricciardi, Vincenza Antonucci. Quasi-Static and Low-Velocity Impact Behavior of Intraply Hybrid Flax/Basalt Composites. Fibers. 2019; 7 (3):26.

Chicago/Turabian Style

Fabrizio Sarasini; Jacopo Tirillò; Luca Ferrante; Claudia Sergi; Pietro Russo; Giorgio Simeoli; Francesca Cimino; Maria Rosaria Ricciardi; Vincenza Antonucci. 2019. "Quasi-Static and Low-Velocity Impact Behavior of Intraply Hybrid Flax/Basalt Composites." Fibers 7, no. 3: 26.

Journal article
Published: 12 December 2018 in Composite Structures
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The increasing use of natural fibre composites in at least semi-structural applications along with a demand for a fast and accurate damage detection for quality purpose and in-service reliability promote a need for non-contact non-destructive testing techniques. To this purpose, ultrasound is probably one of the most widely used testing techniques but the need of a coupling fluid like water limits its use with natural fibre composites. In this work, a novel non-contact set-up based on laser excitation of ultrasound and detection with a broadband, air-coupled optical microphone is presented and tested on flax/PLA laminates. This material system has been characterized in terms of quasi-static mechanical properties and low velocity impact response. The outcomes of this study demonstrate the potential of this non-contact and nondestructive system for quality and damage inspection purposes of natural fibre composites.

ACS Style

Balthasar Fischer; Fabrizio Sarasini; Jacopo Tirillò; Fabienne Touchard; Laurence Chocinski-Arnault; David Mellier; Nils Panzer; Ryan Sommerhuber; Pietro Russo; Ilaria Papa; Valentina Lopresto; Romain Ecault. Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound. Composite Structures 2018, 210, 922 -931.

AMA Style

Balthasar Fischer, Fabrizio Sarasini, Jacopo Tirillò, Fabienne Touchard, Laurence Chocinski-Arnault, David Mellier, Nils Panzer, Ryan Sommerhuber, Pietro Russo, Ilaria Papa, Valentina Lopresto, Romain Ecault. Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound. Composite Structures. 2018; 210 ():922-931.

Chicago/Turabian Style

Balthasar Fischer; Fabrizio Sarasini; Jacopo Tirillò; Fabienne Touchard; Laurence Chocinski-Arnault; David Mellier; Nils Panzer; Ryan Sommerhuber; Pietro Russo; Ilaria Papa; Valentina Lopresto; Romain Ecault. 2018. "Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound." Composite Structures 210, no. : 922-931.

Journal article
Published: 14 November 2018 in Composite Structures
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Scope of the present work is to visualize with infrared thermography the impact damaging of basalt-based composites. Two types of specimens are prepared with basalt fibres embedded in a polypropylene (PP) matrix, which is used either pure, or modified with the addition of a coupling agent. The latter improves the fibre/matrix interface strength providing in practice a material of different characteristics. Specimens are impacted at low velocity/energy with a modified Charpy pendulum while the infrared camera views the surface opposite to the impacted one and records thermal images in time sequence. The acquired sequences are post-processed to obtain information which may be exploited for the material characterization. In particular, the attention is to identify initiation and propagation of the impact damage and the overall delamination extension, as well as to discriminate likely differences between grafted and un-grafted composites in their impact-reaction. As a main result, the effects of the specimen’s fixture on the damage extension are highlighted.

ACS Style

S. Boccardi; Natalino Daniele Boffa; G.M. Carlomagno; G. Del Core; C. Meola; P. Russo; G. Simeoli. Inline monitoring of basalt-based composites under impact tests. Composite Structures 2018, 210, 152 -158.

AMA Style

S. Boccardi, Natalino Daniele Boffa, G.M. Carlomagno, G. Del Core, C. Meola, P. Russo, G. Simeoli. Inline monitoring of basalt-based composites under impact tests. Composite Structures. 2018; 210 ():152-158.

Chicago/Turabian Style

S. Boccardi; Natalino Daniele Boffa; G.M. Carlomagno; G. Del Core; C. Meola; P. Russo; G. Simeoli. 2018. "Inline monitoring of basalt-based composites under impact tests." Composite Structures 210, no. : 152-158.

Journal article
Published: 27 July 2018 in Composite Structures
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Friction Riveting is a spot joining, which consists in rotating a cylindrical rivet and inserting it into clamped sheets. In the first friction phase, the rotational speed and the applied axial force heat the material by friction plasticizing it. After that, the spindle rotation is stopped and the axial force is increased passing to the so called forging phase. Several working parameters, such as the rotational speed, the friction and forging times, and the friction and forging pressure, have to be optimized to achieve sound connections. In the proposed work, the attention was given to the joints of sheets made of a thermoplastic material with and without short glass fiber reinforcements. Rivets were made of Titanium Grade 2. The quality of the obtained results was verified by tensile tests. Moreover, microscopic observations were performed analyzing the material deformation and integrity inside the connection volume. The influences of the monitored process parameters on the above highlighted outputs were reported providing a guideline for the process execution.

ACS Style

F. Gagliardi; Romina Conte; C. Ciancio; G. Simeoli; V. Pagliarulo; G. Ambrogio; P. Russo. Joining of thermoplastic structures by Friction Riveting: A mechanical and a microstructural investigation on pure and glass reinforced polyamide sheets. Composite Structures 2018, 204, 268 -275.

AMA Style

F. Gagliardi, Romina Conte, C. Ciancio, G. Simeoli, V. Pagliarulo, G. Ambrogio, P. Russo. Joining of thermoplastic structures by Friction Riveting: A mechanical and a microstructural investigation on pure and glass reinforced polyamide sheets. Composite Structures. 2018; 204 ():268-275.

Chicago/Turabian Style

F. Gagliardi; Romina Conte; C. Ciancio; G. Simeoli; V. Pagliarulo; G. Ambrogio; P. Russo. 2018. "Joining of thermoplastic structures by Friction Riveting: A mechanical and a microstructural investigation on pure and glass reinforced polyamide sheets." Composite Structures 204, no. : 268-275.

Journal article
Published: 01 April 2018 in Composite Structures
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The growing environmental awareness is driving attention towards the development of ever more ecological and friendly materials, calling for the use of natural matrix and fibres in composite materials. The attention of this work is focused on two types of composites, which both include jute as reinforcement but different matrices. One matrix is polypropylene (PP) and the other one is poly-lactic acid (PLA), so to have partial, or total, natural materials. Several specimens are prepared and tested under impact, or cyclic and quasi-static bending. An infrared imaging device is used to in-line monitoring of specimens under each test. The visualization of thermal effects coupled with mechanical stresses allows getting complimentary information, which may be exploited to better understand the reaction of materials to applied forces and their damaging modes.

ACS Style

Simone Boccardi; Giovanni Maria Carlomagno; Carosena Meola; Pietro Russo; Giorgio Simeoli. The contribution of infrared thermography in the characterization of jute based composites. Composite Structures 2018, 190, 119 -126.

AMA Style

Simone Boccardi, Giovanni Maria Carlomagno, Carosena Meola, Pietro Russo, Giorgio Simeoli. The contribution of infrared thermography in the characterization of jute based composites. Composite Structures. 2018; 190 ():119-126.

Chicago/Turabian Style

Simone Boccardi; Giovanni Maria Carlomagno; Carosena Meola; Pietro Russo; Giorgio Simeoli. 2018. "The contribution of infrared thermography in the characterization of jute based composites." Composite Structures 190, no. : 119-126.

Journal article
Published: 20 December 2017 in Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
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Composite materials are becoming ever more popular in an increasing number of applications. This because of their many advantages, amongst others the possibility to create a new material of given characteristics in a quite simple way by changing either the type of matrix, or reinforcement, and/or rearranging the reinforcement in a different way. Of course, once a new material is created, it is necessary to characterize it to verify its suitability for a specific exploitation. In this context, infrared thermography (IRT) represents a viable means since it is noncontact, nonintrusive, and can be used either for nondestructive evaluation to detect manufacturing defects, or fatigue-induced degradation, or else for monitoring the inline response to applied loads. In this work, IRT is used to investigate different types of composite materials, which involve carbon fibers embedded in a thermoset matrix and either glass or jute fibers embedded in a thermoplastic matrix, which may be neat, or modified by the addition of a percentage of a specific compatibilizing agent. IRT is used with a twofold function. First, for nondestructive evaluation, with the lock-in technique, before and after loading to either assure absence of manufacturing defects, or discover the damage caused by the loads. Second, for visualization of thermal effects, which develop when the material is subjected to impact. The obtained results show that it is possible to follow inline what happens to the material (bending, delamination, and eventual failure) under impact and get information, which may be valuable to deepen the complex impact damaging mechanisms of composites.

ACS Style

Simone Boccardi; Natalino D. Boffa; Giovanni M. Carlomagno; Carosena Meola; Fabrizio Ricci; Pietro Russo; Giorgio Simeoli. The Added Value of Infrared Thermography to Assess the Impact Performance of Composites. Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems 2017, 1, 021003 .

AMA Style

Simone Boccardi, Natalino D. Boffa, Giovanni M. Carlomagno, Carosena Meola, Fabrizio Ricci, Pietro Russo, Giorgio Simeoli. The Added Value of Infrared Thermography to Assess the Impact Performance of Composites. Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems. 2017; 1 (2):021003.

Chicago/Turabian Style

Simone Boccardi; Natalino D. Boffa; Giovanni M. Carlomagno; Carosena Meola; Fabrizio Ricci; Pietro Russo; Giorgio Simeoli. 2017. "The Added Value of Infrared Thermography to Assess the Impact Performance of Composites." Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems 1, no. 2: 021003.

Article
Published: 20 November 2017 in Journal of Applied Polymer Science
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In this work, experimental results about poly(butylene terephthalate) (PBT) based nanocomposites filled with various amounts of silica nanoparticles (NPs) are reported. Two different types of filler are used: silica gel NPs, produced through the Stöber method, and a commercial fumed silica, both coated by a PBT shell. Melt-mixed samples have been thoroughly investigated by scanning and transmission electron microscopy, infrared Fourier transform spectroscopy (FTIR), thermal gravimetric analysis, differential scanning calorimetry, wide and small angle X-ray diffraction, and dynamic mechanical analysis. A fine and very good dispersion of NPs into the polymeric matrix is revealed through the morphological analysis when Stöber NPs were used as filler with respect to systems including commercial fumed silica particles. This evidence, combined with matrix–filler interactions revealed by FTIR spectroscopy, justifies the enhancement of both storage modulus and glass transition temperature of the former samples in comparison with reference pristine PBT. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46006.

ACS Style

P. Russo; A. Costantini; G. Luciani; F. Tescione; M. Lavorgna; F. Branda; B. Silvestri. Thermo-mechanical behavior of poly(butylene terephthalate)/silica nanocomposites. Journal of Applied Polymer Science 2017, 135, 46006 .

AMA Style

P. Russo, A. Costantini, G. Luciani, F. Tescione, M. Lavorgna, F. Branda, B. Silvestri. Thermo-mechanical behavior of poly(butylene terephthalate)/silica nanocomposites. Journal of Applied Polymer Science. 2017; 135 (11):46006.

Chicago/Turabian Style

P. Russo; A. Costantini; G. Luciani; F. Tescione; M. Lavorgna; F. Branda; B. Silvestri. 2017. "Thermo-mechanical behavior of poly(butylene terephthalate)/silica nanocomposites." Journal of Applied Polymer Science 135, no. 11: 46006.