Influence of mechanical properties, anisotropy, surface roughness and porosity of brick on FRP debonding force

Sassoni, Enrico; Andreotti, S.; Bellini, Alessandro; Mazzanti, Barbara; Bignozzi, Maria; Mazzotti, Claudio; Franzoni, Elisa

doi:10.1016/j.compositesb.2016.10.020

Cited by 34 publications

(21 citation statements)

References 25 publications

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“…Surface roughness was determined by a Leica dual core 3D microscope Leica DCM 3D (Leica Microsystems, L'Hospitalet de Llobregat, Spain) analyzing a surface of 2 mm × 1.2 mm by the Leica Map DCM 3D software [12,13]. The parameters Sa, Sq, Sz, Ssk, Sku and Str were calculated (UNE ISO, 25178-2:2013) [14].…”

Section: Roughness and Hydrophobicity Measurementsmentioning

confidence: 99%

Effect of biomaterials hydrophobicity and roughness on biofilm development

De-la-Pinta

Cobos

Ibarretxe

et al. 2019

J Mater Sci: Mater Med

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Most hospitalized patients are carriers of biomedical devices. Infections associated with these devices cause great morbidity and mortality, especially in patients in intensive care units. Numerous strategies have been designed to prevent biofilm development on biodevices. However, biofilm formation is a complex process not fully clarified. In the current study, roughness and hydrophobicity of different biomaterials was analyzed to assess their influences on the biofilm formation of four leading etiological causes of healthcare-associated infections, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis and Candida albicans, using a CDC biofilm reactor. Hydrophobic materials allowed the formation of more abundant and profuse biofilms. Roughness had effect on biofilm formation, but its influence was not significant when material hydrophobicity was considered.

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Section: Roughness and Hydrophobicity Measurementsmentioning

confidence: 99%

Effect of biomaterials hydrophobicity and roughness on biofilm development

De-la-Pinta

Cobos

Ibarretxe

et al. 2019

J Mater Sci: Mater Med

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“…Besides, the diffusion theory cannot explain the difference in adhesion forces between thermoplastic monofilament and surfaces that might be both smooth and rough surfaces and produced with the same polymer such as textiles. Therefore, researchers mainly used the mechanical adhesion theory to explain bonding of materials to textiles (Aubrey et al, 2005;Graupner et al, 2014;Anvar and Akbarzadeh, 2017;Dy et al, 2017;Bonpain and Stommel, 2018;Jiao et al, 2018;Periyasamy et al, 2018;El-Saftawy et al, 2018;Rodriguez-Contreras et al, 2018;Jing et al, 2018;Bozaci et al, 2013;Porras et al, 2015;Sassoni et al, 2017;Ho et al, 2012;Yan et al, 2014;Krump et al, 2006;Staszel and Yarin, 2017;Ayu et al, 2017). The mechanical adhesion theory justifies the enhancement of the adhesion strength because of the roughness and porosity of the adherent (in our case the textiles surfaces).…”

Section: Introductionmentioning

confidence: 99%

Optimization of adhesion of poly lactic acid 3D printed onto polyethylene terephthalate woven fabrics through modelling using textile properties

Eutionnat-Diffo

Chen

Guan

et al. 2019

RPJ

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Purpose This paper aims to evaluate and simulate the impact of the build platform temperature of the three-dimensional (3D) printer, the structure and heat transfer of textiles on the adhesion and durability after washing properties of 3D printed polymer onto textile materials using thin layers of conductive and non-conductive extruded poly lactic acid monofilaments (PLA) deposited on polyethylene terephthalate (PET) woven fabrics through fused deposition modeling (FDM) process. Design/methodology/approach Prior to FDM process, thermal conductivity, surface roughness and mean pore size of PET woven fabrics were assessed using the “hot disk,” the profilometer and the capillary flow porometry methods, respectively. After the FDM process, the adhesion and durability after the washing process properties of the materials were determined and optimized based on reliable statistical models connecting those properties to the textile substrate properties such as surface roughness, mean pore size and thermal conductivity. Findings The main findings point out that higher roughness coefficient and mean pore size and lower thermal conductivity of polyester woven textile materials improve the adhesion properties and the build platform presents a quadratic effect. Additionally, the adhesion strength decreases by half after the washing process and rougher and more porous textile structures demonstrate better durability. These results are explained by the surface topography of textile materials that define the anchorage areas between the printed layer and the textiles. Originality/value This study is for great importance in the development of smart textiles using FDM process as it presents unique and reliable models used to optimize adhesion resistance of 3D printed PLA primary layer onto PET textiles.

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“…This aspect may be partially related to an additional interlocking effect provided by mortar joints, but it was found to be also strictly linked to the mechanical and physical properties of the substrate: anisotropy of the brick (different faces used), porosity and surface roughness [29,30,32].…”

Section: Global Results: Force-slip Curves 23mentioning

confidence: 99%

“…Experimental analyses were also conducted in [19] on masonry stones reinforced with CFRPs, concluding that the type of substrate has a great influence on the bond capacity, not only in terms of mechanical properties, but also in terms of other physical properties. Advanced studies carried out on masonry panels made of clay bricks strengthened with GFRPs [29,30,32] confirmed that taking into account only mechanical properties and not considering brick anisotropy or physical properties such as porosity and surface roughness cannot lead to a correct estimation of the bond capacity; in this framework, the analyzed physical and mechanical properties can also explain different penetration depth for different substrates.…”

Section: Failure Modes 22mentioning

confidence: 90%

“…However, recent researches [29,30,32] pointed out that taking into account only bricks mechanical properties is not sufficient to properly evaluate maximum debonding forces revealed during experimental tests. Other parameters, such as porosity and surface roughness, were found to play a crucial role in influencing the resin capacity to penetrate into the substrate and in determining the debonding load.…”

Section: Bond Strength Modelsmentioning

confidence: 99%

See 1 more Smart Citation

A review on the bond behavior of FRP composites applied on masonry substrates

Bellini

Mazzotti

2017

RILEM Tech Lett

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The need of repairing and retrofitting masonry buildings, typical of Italian and European built heritage, determined a growing interest towards the development of effective and cost efficient innovative strengthening solutions. Among the different techniques currently available, the adoption of composite materials, such as Fiber Reinforced Polymers (FRPs), proved to be one of the most viable solutions for the strengthening of masonry structures. If not properly fixed, a common failure mode of this system is the early debonding of the reinforcement from the substrate. For this reason, several experimental tests and numerical analyses are currently available in the literature, clarifying and predicting the bond behavior of FRP glued to masonry substrates. The purpose of this paper is to provide an overview of the results obtained by the different experimental works, of the numerical analyses performed both for evaluating and validating experimental results and of the simplified analytical models currently available for the prediction of the maximum capacity of the strengthening systems. Results of extended experimental campaigns, carried out also within different Round Robin Test (RRT) series, with several laboratories involved, and recent model calibrations will be discussed together with the approach proposed by the actual guidelines.

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Influence of mechanical properties, anisotropy, surface roughness and porosity of brick on FRP debonding force

Cited by 34 publications

References 25 publications

Effect of biomaterials hydrophobicity and roughness on biofilm development

Effect of biomaterials hydrophobicity and roughness on biofilm development

Optimization of adhesion of poly lactic acid 3D printed onto polyethylene terephthalate woven fabrics through modelling using textile properties

A review on the bond behavior of FRP composites applied on masonry substrates

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