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Tommaso Scalici
Department of “Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali” (DICAM), University of Palermo, Italy

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Journal article
Published: 28 April 2020 in Materials & Design
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Nowadays glass is widely used in building applications and coupled to steel through adhesive joining. Reliable mechanical characterization of these joints is necessary to design and predict the final structure performance. In this framework, the aim of this paper is to measure the pure shear strength and elastic modulus for design and modelling of adhesive joined glass-to-steel structures. Torsional shear strength and elastic properties of an adhesively bonded glass-to-steel component were measured on several joined steel-to-steel and steel-to-glass samples. An epoxy resin-based adhesive was used as joining material for AISI304 steel and soda-lime glass. The same steel and adhesive were used to obtain steel-to-steel joined sample bars to be tested in asymmetrical four-point bending, for comparison purposes. The indentation elastic modulus of the adhesive, both inside the joined region and as a bulk, was measured by nano-indentation and impulse excitation technique. Finally, the effect of etching on the glass was studied and correlated to the glass-steel joint strength. This study shows that torsion test can be used to provide reliable shear strength values for design and modelling glass-to-steel adhesive joined components.

ACS Style

Stefano De La Pierre; Tommaso Scalici; Peter Tatarko; Antonino Valenza; Luca Goglio; Davide S. Paolino; Monica Ferraris. Torsional shear strength and elastic properties of adhesively bonded glass-to-steel components. Materials & Design 2020, 192, 108739 .

AMA Style

Stefano De La Pierre, Tommaso Scalici, Peter Tatarko, Antonino Valenza, Luca Goglio, Davide S. Paolino, Monica Ferraris. Torsional shear strength and elastic properties of adhesively bonded glass-to-steel components. Materials & Design. 2020; 192 ():108739.

Chicago/Turabian Style

Stefano De La Pierre; Tommaso Scalici; Peter Tatarko; Antonino Valenza; Luca Goglio; Davide S. Paolino; Monica Ferraris. 2020. "Torsional shear strength and elastic properties of adhesively bonded glass-to-steel components." Materials & Design 192, no. : 108739.

Journal article
Published: 07 February 2020 in Composites Part B: Engineering
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Aim of the present paper is to evaluate how the bearing behavior of pinned flax composites can be influenced by their exposition to critical environment such as marine one. To this scope, flax fibers/epoxy pinned laminate was exposed up to 60 days to salt-fog environment, according to ASTM B 117 standard. In particular, samples having different hole diameter (D), laminate width (W), and hole center to laminate free edge distance (E) have been tested under single lap bearing tests at varying the aging exposition time. Following this procedure, an experimental 2D failure map clustering main failure modes was created by placing the experimental results in the plane E/D versus W/D ratios, and its variation was analyzed at varying the aging exposition. Experimental results showed that environmental aging induced modification on the mechanical performances of the pinned composite. Furthermore, the failure map, defined by E/D and W/D ratios axes, evidenced a progressive modification of damage mechanisms transitions, at increasing the exposition time. In particular, due to significant reductions of tensile and shear strengths of flax laminate, the progressive fracture by bearing mode was not observed for aged samples, replaced by premature and catastrophic shear out and net tension mechanisms.

ACS Style

V. Fiore; L. Calabrese; Tommaso Scalici; A. Valenza. Evolution of the bearing failure map of pinned flax composite laminates aged in marine environment. Composites Part B: Engineering 2020, 187, 107864 .

AMA Style

V. Fiore, L. Calabrese, Tommaso Scalici, A. Valenza. Evolution of the bearing failure map of pinned flax composite laminates aged in marine environment. Composites Part B: Engineering. 2020; 187 ():107864.

Chicago/Turabian Style

V. Fiore; L. Calabrese; Tommaso Scalici; A. Valenza. 2020. "Evolution of the bearing failure map of pinned flax composite laminates aged in marine environment." Composites Part B: Engineering 187, no. : 107864.

Journal article
Published: 26 December 2019 in Polymers
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The aim of the present paper is to study the mechanical performance evolution of pinned hybrid glass-flax composite laminates under environment aging conditions. Hybrid glass-flax fibers/epoxy pinned laminates were exposed to salt-spray fog environmental conditions up to 60 days. With the purpose of assessing the relationship between mechanical performances and failure mechanisms at increasing aging time, single lap joints at varying joint geometry (i.e., hole diameter D and hole distance E from free edge) were characterized after 0 days (i.e., unaged samples), 30 days, and 60 days of salt-fog exposition. Based on this approach, the property–structure relationship of the composite laminates was assessed on these critical environmental conditions. In particular, a reduction of failure strength for long-aging-time-aged samples was observed in the range 20–30% compared to unaged one. Due to the natural fiber degradation in a salt-fog environment, premature catastrophic fractures mode due to shear-out and net-tension were found, related to reduced joint fracture strength. This behavior identifies that this type of joint requires a careful design in order to guarantee an effective mechanical stability of the composite hybrid joint under long-term operating conditions in an aggressive environment.

ACS Style

Luigi Calabrese; Vincenzo Fiore; Paolo Bruzzaniti; Tommaso Scalici; Antonino Valenza. Pinned Hybrid Glass-Flax Composite Laminates Aged in Salt-Fog Environment: Mechanical Durability. Polymers 2019, 12, 40 .

AMA Style

Luigi Calabrese, Vincenzo Fiore, Paolo Bruzzaniti, Tommaso Scalici, Antonino Valenza. Pinned Hybrid Glass-Flax Composite Laminates Aged in Salt-Fog Environment: Mechanical Durability. Polymers. 2019; 12 (1):40.

Chicago/Turabian Style

Luigi Calabrese; Vincenzo Fiore; Paolo Bruzzaniti; Tommaso Scalici; Antonino Valenza. 2019. "Pinned Hybrid Glass-Flax Composite Laminates Aged in Salt-Fog Environment: Mechanical Durability." Polymers 12, no. 1: 40.

Article
Published: 13 November 2019 in Journal of Polymer Science
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Noninvasive X‐ray micro‐computed tomography was applied for a complete quantitative and qualitative analysis of the cellular structure of composite foams constituted by a silicone matrix and a glass production waste filler. Composite foams with different glass filler weight content in the range 0–80% were synthesized and characterized. The tomographic analysis was employed in order to assess the structural heterogeneities, void fraction values, and bubble size distribution for all composite foams. The 3D micro‐CT images analysis, performed at different cross‐sections, highlighted heterogeneous cell growth or more elongated cells in the case of low and high filler content foams, respectively. Batch with 60% of glass filler was identified as a composite foam with effective void fraction values and relatively uniform spheroidal cellular structure (average sphericity 0.723 and diameter 0.107 mm). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48718.

ACS Style

Luigi Calabrese; Tommaso Scalici; Amani Khaskhoussi; Edoardo Proverbio; Antonino Valenza. Micro‐tomographic characterization of composite recycled glass‐silicone foams for applications in civil engineering. Journal of Polymer Science 2019, 137, 1 .

AMA Style

Luigi Calabrese, Tommaso Scalici, Amani Khaskhoussi, Edoardo Proverbio, Antonino Valenza. Micro‐tomographic characterization of composite recycled glass‐silicone foams for applications in civil engineering. Journal of Polymer Science. 2019; 137 (21):1.

Chicago/Turabian Style

Luigi Calabrese; Tommaso Scalici; Amani Khaskhoussi; Edoardo Proverbio; Antonino Valenza. 2019. "Micro‐tomographic characterization of composite recycled glass‐silicone foams for applications in civil engineering." Journal of Polymer Science 137, no. 21: 1.

Journal article
Published: 31 October 2019 in Fibers
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The aim of the present paper is to assess the bearing performance evolution of pinned, glass-composite laminates due to environmental aging in salt-spray fog tests. Glass fibers/epoxy pinned laminates were exposed for up to 60 days in salt-spraying, foggy environmental conditions (according to ASTM B117 standard). In order to evaluate the relationship between mechanical failure mode and joint stability over increasing aging time, different single lap joints, measured by the changing hole diameter (D), laminate width (W) and hole free edge distance (E), were characterized at varying aging steps. Based on this approach, the property-structure relationship of glass-fibers/epoxy laminates was assessed under these critical environmental conditions. Furthermore, an experimental 2D failure map, clustering main failure modes in the plane E/D versus W/D ratios, was generated, and its cluster variation was analyzed at each degree of aging.

ACS Style

Luigi Calabrese; Vincenzo Fiore; Paolo Giovanni Bruzzaniti; Tommaso Scalici; Antonino Valenza. An Aging Evaluation of the Bearing Performances of Glass Fiber Composite Laminate in Salt Spray Fog Environment. Fibers 2019, 7, 96 .

AMA Style

Luigi Calabrese, Vincenzo Fiore, Paolo Giovanni Bruzzaniti, Tommaso Scalici, Antonino Valenza. An Aging Evaluation of the Bearing Performances of Glass Fiber Composite Laminate in Salt Spray Fog Environment. Fibers. 2019; 7 (11):96.

Chicago/Turabian Style

Luigi Calabrese; Vincenzo Fiore; Paolo Giovanni Bruzzaniti; Tommaso Scalici; Antonino Valenza. 2019. "An Aging Evaluation of the Bearing Performances of Glass Fiber Composite Laminate in Salt Spray Fog Environment." Fibers 7, no. 11: 96.

Journal article
Published: 01 October 2019 in Composite Structures
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ACS Style

Giuseppe Pitarresi; Tommaso Scalici; Giuseppe Catalanotti. Infrared Thermography assisted evaluation of static and fatigue Mode II fracture toughness in FRP composites. Composite Structures 2019, 226, 1 .

AMA Style

Giuseppe Pitarresi, Tommaso Scalici, Giuseppe Catalanotti. Infrared Thermography assisted evaluation of static and fatigue Mode II fracture toughness in FRP composites. Composite Structures. 2019; 226 ():1.

Chicago/Turabian Style

Giuseppe Pitarresi; Tommaso Scalici; Giuseppe Catalanotti. 2019. "Infrared Thermography assisted evaluation of static and fatigue Mode II fracture toughness in FRP composites." Composite Structures 226, no. : 1.

Journal article
Published: 12 September 2019 in Engineering Fracture Mechanics
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A new methodology to measure the Mode II interlaminar fracture in fatigue for FRP composites is developed. The proposed methodology uses a Modified Transvers Crack Tensile (MTCT) specimen and is able to characterize the near threshold behavior in a robust, easier and significantly faster way than standard procedures. Analytical formulae, able to link the crack growth rate to the load or strain amplitudes, were found and verified, and their importance was explained, in particular, for what concerns the characterisation of the near threshold behavior. Experiments were performed both in load and strain control, while the delamination growth was monitored using different techniques including the Thermoelastic Stress Analysis (TSA). Experiments showed the reliability and effectiveness of the proposed procedure, and evidence its suitability and compatibility with current industrial material testing and qualification protocols with particular emphasis to industrial environment where a “no growth” design approach is employed.

ACS Style

Giuseppe Pitarresi; Tommaso Scalici; Marco Dellaira; Giuseppe Catalanotti. A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites. Engineering Fracture Mechanics 2019, 220, 106629 .

AMA Style

Giuseppe Pitarresi, Tommaso Scalici, Marco Dellaira, Giuseppe Catalanotti. A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites. Engineering Fracture Mechanics. 2019; 220 ():106629.

Chicago/Turabian Style

Giuseppe Pitarresi; Tommaso Scalici; Marco Dellaira; Giuseppe Catalanotti. 2019. "A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites." Engineering Fracture Mechanics 220, no. : 106629.

Journal article
Published: 02 April 2019 in Polymers
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The Achilles heel of thermoplastic natural fibre composites is their limited durability. The environmental degradation of the mechanical properties of hemp and hemp/basalt hybrid-reinforced high-density polyethylene (HDPE) composites has been investigated with a special focus on the effects of water ageing and accelerated ageing, including hygrothermal and UV radiation. Modification of the matrix was carried out using a maleic anhydride high-density polyethylene copolymer (MAPE) as a compatibilizer. Hybridization of hemp fibres with basalt fibres and the incorporation of MAPE were found to significantly decrease the water uptake (up to 75%) and increase the retention of mechanical properties after accelerated ageing. Secondary crystallization phenomena occurring in the composites, as confirmed by differential scanning calorimetry (DSC) analysis, were able to counteract the severe combined effects of hygrothermal stress and UV radiation, with the exception of hemp-fibre composites where permanent damage to the fibres occurred, with 2% and 20% reduction in tensile strength and modulus, respectively, for a 30 wt % hemp fibre-reinforced HDPE.

ACS Style

Claudia Sergi; Jacopo Tirillò; Maria Carolina Seghini; Fabrizio Sarasini; Vincenzo Fiore; Tommaso Scalici. Durability of Basalt/Hemp Hybrid Thermoplastic Composites. Polymers 2019, 11, 603 .

AMA Style

Claudia Sergi, Jacopo Tirillò, Maria Carolina Seghini, Fabrizio Sarasini, Vincenzo Fiore, Tommaso Scalici. Durability of Basalt/Hemp Hybrid Thermoplastic Composites. Polymers. 2019; 11 (4):603.

Chicago/Turabian Style

Claudia Sergi; Jacopo Tirillò; Maria Carolina Seghini; Fabrizio Sarasini; Vincenzo Fiore; Tommaso Scalici. 2019. "Durability of Basalt/Hemp Hybrid Thermoplastic Composites." Polymers 11, no. 4: 603.

Journal article
Published: 10 February 2019 in Composite Structures
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This paper presents an experimental study in the field of structures made of pultruded fiber reinforced polymers (FRP) elements to be used for emergency purposes. A preliminary design of a 3D pultruded glass fiber reinforced polymer structure is presented with the mechanical characterization of the constituting elements. The axial and flexural properties of laminate and I-shaped GRFP profiles are discussed considering the short term creep. In a companion paper, the benefits, the limits and the reliability of the structure analyzed for emergency applications are discussed. In details, the numerical structural analysis of the full-scale 3D model is described followed by the experimental assessment of the structural capacity by a full-scale 2D model.

ACS Style

L. Cavaleri; M. Di Paola; M.F. Ferrotto; Tommaso Scalici; A. Valenza. Structural performances of pultruded GFRP emergency structures – Part 1: Experimental characterization of materials and substructure. Composite Structures 2019, 214, 325 -334.

AMA Style

L. Cavaleri, M. Di Paola, M.F. Ferrotto, Tommaso Scalici, A. Valenza. Structural performances of pultruded GFRP emergency structures – Part 1: Experimental characterization of materials and substructure. Composite Structures. 2019; 214 ():325-334.

Chicago/Turabian Style

L. Cavaleri; M. Di Paola; M.F. Ferrotto; Tommaso Scalici; A. Valenza. 2019. "Structural performances of pultruded GFRP emergency structures – Part 1: Experimental characterization of materials and substructure." Composite Structures 214, no. : 325-334.

Article
Published: 12 December 2018 in Journal of Applied Polymer Science
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The investigation for natural fibers composites in terms of performance, durability, and environmental impact for structural applications in marine environments is a relevant challenge in scientific and industrial field. On this context, the aim of this work is to assess the durability and mechanical stability in severe environment of epoxy/glass–flax hybrid composites. For the sake of comparison, also full flax and glass epoxy composites were investigated. All samples were exposed to salt–fog environmental conditions up to 60 aging days. Wettability behavior during time was compared with water uptake evolution to assess water sensitivity of hybrid composite configurations. Moreover, quasi‐static flexural and dynamic mechanical analysis were carried to evaluate as aging conditions, laminate configuration influence the surface and mechanical performances stability of the hybrid composites. The addition of glass fibers on flax laminate allows to enhance both flexural strength by 90%, and modulus by 128%, even if these properties are lower than those of full glass laminates. The results evidenced that the hybridization of flax fibers with glass ones is a practical approach to enhance the aging durability of epoxy/flax composite laminates in marine environmental conditions, obtaining a suitable compromise among environmental impact, mechanical properties, aging resistance, and costs. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 136, 47203.

ACS Style

L. Calabrese; V. Fiore; T. Scalici; A. Valenza. Experimental assessment of the improved properties during aging of flax/glass hybrid composite laminates for marine applications. Journal of Applied Polymer Science 2018, 1 .

AMA Style

L. Calabrese, V. Fiore, T. Scalici, A. Valenza. Experimental assessment of the improved properties during aging of flax/glass hybrid composite laminates for marine applications. Journal of Applied Polymer Science. 2018; ():1.

Chicago/Turabian Style

L. Calabrese; V. Fiore; T. Scalici; A. Valenza. 2018. "Experimental assessment of the improved properties during aging of flax/glass hybrid composite laminates for marine applications." Journal of Applied Polymer Science , no. : 1.

Journal article
Published: 01 September 2018 in Composites Part B: Engineering
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This paper represents the first effort aimed to the investigation of the pin/hole contact stress and failure mechanisms of epoxy composites reinforced with woven flax fabrics, underwent to tensile bearing tests. In particular, the maximum loads and failure modes are evaluated at varying the laminate geometrical configuration. In order to optimize the use of polymer composites reinforced with flax fibers in structural applications, an experimental failure map, identifying main failure modes of mechanically fastened joints, is obtained as function of hole diameter, distance of the hole from the free edge of the laminate and laminate width. Moreover, a theoretical approach based on the observation that a particular fracture mechanism occurs when its threshold fracture load is lower than the loads of the other competitive ones, is proposed. Main goal of this paper is to give a simple experimental methodology to support the joining design of natural composite laminates reinforced with woven flax fabrics.

ACS Style

V. Fiore; L. Calabrese; T. Scalici; P. Bruzzaniti; A. Valenza. Experimental design of the bearing performances of flax fiber reinforced epoxy composites by a failure map. Composites Part B: Engineering 2018, 148, 40 -48.

AMA Style

V. Fiore, L. Calabrese, T. Scalici, P. Bruzzaniti, A. Valenza. Experimental design of the bearing performances of flax fiber reinforced epoxy composites by a failure map. Composites Part B: Engineering. 2018; 148 ():40-48.

Chicago/Turabian Style

V. Fiore; L. Calabrese; T. Scalici; P. Bruzzaniti; A. Valenza. 2018. "Experimental design of the bearing performances of flax fiber reinforced epoxy composites by a failure map." Composites Part B: Engineering 148, no. : 40-48.

Journal article
Published: 01 August 2018 in Polymer Testing
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ACS Style

V. Fiore; L. Calabrese; T. Scalici; P. Bruzzaniti; A. Valenza. Bearing strength and failure behavior of pinned hybrid glass-flax composite laminates. Polymer Testing 2018, 69, 310 -319.

AMA Style

V. Fiore, L. Calabrese, T. Scalici, P. Bruzzaniti, A. Valenza. Bearing strength and failure behavior of pinned hybrid glass-flax composite laminates. Polymer Testing. 2018; 69 ():310-319.

Chicago/Turabian Style

V. Fiore; L. Calabrese; T. Scalici; P. Bruzzaniti; A. Valenza. 2018. "Bearing strength and failure behavior of pinned hybrid glass-flax composite laminates." Polymer Testing 69, no. : 310-319.

Journal article
Published: 01 July 2018 in Composites Part B: Engineering
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In this paper, the effect of salt-fog exposition on the mechanical behavior of sandwich panels having cork agglomerate core was investigated. In particular, the aim of this research work is to assess the shield function of unidirectional basalt and E-glass reinforced polymer on the aging and failure mechanism of the core when such class of material are destined to operate in hostile environments (e.g., marine environment). To do this, the manufactured sandwich panels were exposed up to 60 days to salt-fog environment, according to ASTM B 117 standard. Unaged and aged specimens were analyzed through three point bending tests after aging time of 10, 25 and 60 days. Digital Image Correlation (DIC) was carried out to perform a strain field analysis of the longitudinal cross-sections. The differences in the mechanical behavior of the synergistic cooperation of the cork core with basalt and glass fiber were highlighted thorough this technique. Moreover, the failure mechanisms related to each combinations for different aging times were described. The experimental results showed that, the intrinsic conditions of the composites (e.g., presence of defects, poor fiber-matrix adhesion), that are strictly linked to the fiber-matrix compatibility and to the impregnation quality, may induce to differences in the local mechanical behavior of the sandwich panels and to a faster aging process of the cork core in the case of basalt fiber skinned sandwich, especially in the first phases of the exposition.

ACS Style

T. Scalici; V. Fiore; A. Valenza. Experimental assessment of the shield-to-salt-fog properties of basalt and glass fiber reinforced composites in cork core sandwich panels applications. Composites Part B: Engineering 2018, 144, 29 -36.

AMA Style

T. Scalici, V. Fiore, A. Valenza. Experimental assessment of the shield-to-salt-fog properties of basalt and glass fiber reinforced composites in cork core sandwich panels applications. Composites Part B: Engineering. 2018; 144 ():29-36.

Chicago/Turabian Style

T. Scalici; V. Fiore; A. Valenza. 2018. "Experimental assessment of the shield-to-salt-fog properties of basalt and glass fiber reinforced composites in cork core sandwich panels applications." Composites Part B: Engineering 144, no. : 29-36.

Journal article
Published: 28 February 2018 in Journal of Natural Fibers
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In this paper, the aging resistance of sandwich structures made with cork agglomerate as core and flax-reinforced polymeric laminates as face sheets was investigated for the first time. In order to evaluate their durability in a hostile environment, a sandwich plate was manufactured by vacuum bagging technique and aged under salt-fog spray conditions, according to ASTM B 117 standard. The evolution of the sandwich mechanical properties during the aging exposition was analyzed by carrying out quasi-static flexural tests and Charpy impact tests both on unaged specimens and on specimens aged for 10, 25, and 60 days, respectively. The quasi-static experimental results showed that despite the salt-fog exposition leads to clear decrements in both maximum strength and modulus, the deformation capability of the sandwich structure evidences a noticeable improvement. According to this last result, it was found that the impact strength of the sandwich specimens was clearly increased after the salt-fog exposition evidencing that the studied green sandwich maintains good toughness properties in a hostile environment such as marine.

ACS Style

Vincenzo Fiore; Tommaso Scalici; Antonino Valenza. Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures. Journal of Natural Fibers 2018, 16, 977 -986.

AMA Style

Vincenzo Fiore, Tommaso Scalici, Antonino Valenza. Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures. Journal of Natural Fibers. 2018; 16 (7):977-986.

Chicago/Turabian Style

Vincenzo Fiore; Tommaso Scalici; Antonino Valenza. 2018. "Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures." Journal of Natural Fibers 16, no. 7: 977-986.

Article
Published: 26 February 2018 in Polymer Composites
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Aim of this article is the assessment of the bearing mechanical performances of pin-loaded glass laminates as function of their geometrical configuration. To this concern, 32 specimens having different hole diameter (D), laminate width (W), and hole center to laminate free edge distance (E) have been tested under bearing conditions. The maximum bearing stress and the stress-displacement curves were analyzed as function both of hole to laminate free edge distance E and hole diameter D. Moreover, an experimental 2D failure map was created by placing the experimental results (i.e., the kind of failure mechanism occurred for each geometrical configuration) in the plane E/D versus W/D ratios. In order to identify a simplified methodology able to design mechanically fastened joints in an easy and effective way, a simplified theoretical failure map on E/D and W/D axes was proposed. The theoretical model showed a good matching with the experimental results validating the proposed approach. In particular, the proposed simplified failure map highlighted that woven glass fiber composite laminates fastened joints should have E/D and W/D ratios higher than 1.6 and 2.1, respectively, in order to stimulate a progressive bearing failure mechanism and achieve the full laminate strength. Finally, another goal of this article was to assess failure mechanisms evolution by drawing a 3D plot (i.e., at varying E/D and W/D geometrical ratios) of the failure index evaluated for each failure mechanism according to the maximum stress criterion. POLYM. COMPOS., 2018. © 2018 Society of Plastics Engineers

ACS Style

Luigi Calabrese; Vincenzo Fiore; Tommaso Scalici; Paolo Bruzzaniti; Antonino Valenza. Failure maps to assess bearing performances of glass composite laminates. Polymer Composites 2018, 40, 1087 -1096.

AMA Style

Luigi Calabrese, Vincenzo Fiore, Tommaso Scalici, Paolo Bruzzaniti, Antonino Valenza. Failure maps to assess bearing performances of glass composite laminates. Polymer Composites. 2018; 40 (3):1087-1096.

Chicago/Turabian Style

Luigi Calabrese; Vincenzo Fiore; Tommaso Scalici; Paolo Bruzzaniti; Antonino Valenza. 2018. "Failure maps to assess bearing performances of glass composite laminates." Polymer Composites 40, no. 3: 1087-1096.

Journal article
Published: 01 January 2018 in Procedia Structural Integrity
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The present work investigates the behaviour of a Transvers Crack Tensile (TCT) specimen undergoing fatigue loading, by means of a Thermoelastic Stress Analysis (TSA) experimental setup. The TCT is a tensile composite specimen where a number of internal layers are cut through the beam width. The presence of such transverse notch favours the formation of interlaminar Mode II delaminations, starting from the notch tips and propagating between the cut and continuous plies. In this work, a modification is adopted to the classic TCT specimen, where insert films, mimicking artificial delaminations, are laid across the notch tips. This is done with the purpose to favour a pure Mode II and a symmetric and simultaneous delamination. The modified-TCT has been subject to cyclic sinusoidal loading, typical of fatigue characterisations, and monitored at various crack growth stages by TSA. CFRP and GFRP samples have been prepared and analysed, measuring the thermoelastic signal from the edge and front faces of cycling samples. The information gained from TSA has provided a useful insight on the stress distribution settling near the crack tips, and its evolution with crack growth under fatigue.

ACS Style

Giuseppe Pitarresi; Tommaso Scalici; Giuseppe Catalanotti. Thermoelastic Stress Analysis of modified Transverse Cut Tensile composite specimens under pure Mode II fatigue delamination. Procedia Structural Integrity 2018, 8, 474 -485.

AMA Style

Giuseppe Pitarresi, Tommaso Scalici, Giuseppe Catalanotti. Thermoelastic Stress Analysis of modified Transverse Cut Tensile composite specimens under pure Mode II fatigue delamination. Procedia Structural Integrity. 2018; 8 ():474-485.

Chicago/Turabian Style

Giuseppe Pitarresi; Tommaso Scalici; Giuseppe Catalanotti. 2018. "Thermoelastic Stress Analysis of modified Transverse Cut Tensile composite specimens under pure Mode II fatigue delamination." Procedia Structural Integrity 8, no. : 474-485.

Journal article
Published: 01 December 2017 in Composite Structures
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ACS Style

G. Catalanotti; C. Furtado; T. Scalici; G. Pitarresi; F.P. van der Meer; P.P. Camanho. The effect of through-thickness compressive stress on mode II interlaminar fracture toughness. Composite Structures 2017, 182, 153 -163.

AMA Style

G. Catalanotti, C. Furtado, T. Scalici, G. Pitarresi, F.P. van der Meer, P.P. Camanho. The effect of through-thickness compressive stress on mode II interlaminar fracture toughness. Composite Structures. 2017; 182 ():153-163.

Chicago/Turabian Style

G. Catalanotti; C. Furtado; T. Scalici; G. Pitarresi; F.P. van der Meer; P.P. Camanho. 2017. "The effect of through-thickness compressive stress on mode II interlaminar fracture toughness." Composite Structures 182, no. : 153-163.

Research article
Published: 11 July 2017 in Journal of Composite Materials
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This paper deals with the evaluation of the effect of an eco-friendly and cost-effective surface treatment based on the use of sodium bicarbonate on the mechanical properties of flax-reinforced epoxy composites. To this aim, unidirectional fabrics were soaked for five days in 5 and 10% in weight of sodium bicarbonate solution at 25℃. Quasi-static and dynamic mechanical tests were performed and the fracture surfaces of the composites were analyzed through scanning electron microscopy. Results evidenced that this treatment improves the fiber–matrix adhesion thus increasing the performances of the composites. Treating the fabrics with 10% w/w of bicarbonate solution leads to improvements of ∼20 and ∼45% in tensile strength and modulus of the composites, respectively, compared to untreated ones. Furthermore, by increasing the concentration, negligible changes in the glass transition temperature and reductions in the tanδ peak heights were found. The observation of the fracture surfaces confirmed the beneficial effect of the proposed treatment.

ACS Style

V Fiore; T Scalici; A Valenza. Effect of sodium bicarbonate treatment on mechanical properties of flax-reinforced epoxy composite materials. Journal of Composite Materials 2017, 52, 1061 -1072.

AMA Style

V Fiore, T Scalici, A Valenza. Effect of sodium bicarbonate treatment on mechanical properties of flax-reinforced epoxy composite materials. Journal of Composite Materials. 2017; 52 (8):1061-1072.

Chicago/Turabian Style

V Fiore; T Scalici; A Valenza. 2017. "Effect of sodium bicarbonate treatment on mechanical properties of flax-reinforced epoxy composite materials." Journal of Composite Materials 52, no. 8: 1061-1072.

Journal article
Published: 01 May 2017 in Composites Part B: Engineering
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ACS Style

V. Fiore; T. Scalici; F. Sarasini; J. Tirilló; L. Calabrese. Salt-fog spray aging of jute-basalt reinforced hybrid structures: Flexural and low velocity impact response. Composites Part B: Engineering 2017, 116, 99 -112.

AMA Style

V. Fiore, T. Scalici, F. Sarasini, J. Tirilló, L. Calabrese. Salt-fog spray aging of jute-basalt reinforced hybrid structures: Flexural and low velocity impact response. Composites Part B: Engineering. 2017; 116 ():99-112.

Chicago/Turabian Style

V. Fiore; T. Scalici; F. Sarasini; J. Tirilló; L. Calabrese. 2017. "Salt-fog spray aging of jute-basalt reinforced hybrid structures: Flexural and low velocity impact response." Composites Part B: Engineering 116, no. : 99-112.

Journal article
Published: 01 January 2017 in Archives of Civil and Mechanical Engineering
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Pultrusion is a process allowing the production of unidirectional (roving) fibre-reinforced polymer (FRP) structural elements with constant cross section. Recently, also civil engineers focused their attention on pultruded composite materials as alternative to traditional ones (e.g., concrete, steel). Furthermore, to improve the transverse strength and stiffness with respect to the fibres direction, continuous filament mat (CFM) is often placed within the stacking sequence. The CFM influence on the global mechanical behaviour is not considered by appropriate actual international standards. In this paper, the influence of the CFM layers on the mechanical behaviour of glass fibres pultruded composite material is investigated. In particular, the bending behaviour is analyzed by performing a four-point bending test on specimens extracted from an H-shape member. The experimental analysis was carried out via Electronic Speckle-Pattern Interferometry (ESPI) (handled by phase-stepping technique) to obtain a full-field displacement map and to numerically achieve the longitudinal strains. By imposing the equilibrium conditions and assuming the compression and tensile roving Young's moduli as constant, the CFM Young's moduli are determined. Finally, the mean stress acting on the material is obtained showing that CFM layers have to be considered to correctly evaluate the maximum stress and to optimize the design phase

ACS Style

Salvatore Benfratello; Vincenzo Fiore; Luigi Palizzolo; Tommaso Scalici. Evaluation of continuous filament mat influence on the bending behaviour of GFRP pultruded material via Electronic Speckle Pattern Interferometry. Archives of Civil and Mechanical Engineering 2017, 17, 169 -177.

AMA Style

Salvatore Benfratello, Vincenzo Fiore, Luigi Palizzolo, Tommaso Scalici. Evaluation of continuous filament mat influence on the bending behaviour of GFRP pultruded material via Electronic Speckle Pattern Interferometry. Archives of Civil and Mechanical Engineering. 2017; 17 (1):169-177.

Chicago/Turabian Style

Salvatore Benfratello; Vincenzo Fiore; Luigi Palizzolo; Tommaso Scalici. 2017. "Evaluation of continuous filament mat influence on the bending behaviour of GFRP pultruded material via Electronic Speckle Pattern Interferometry." Archives of Civil and Mechanical Engineering 17, no. 1: 169-177.