Numerical analysis of intralaminar damage evolution on various composite laminates

Hudisteanu, I; Ţăranu, Nicolae; Isopescu, Dorina Nicolina; Entuc, I-S; Oprişan, Gabriel; Ungureanu, Dragoş

doi:10.1088/1757-899x/400/4/042031

Cited by 12 publications

(4 citation statements)

References 12 publications

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“…All failure mechanisms that were identified correspond to those already presented by other authors in previous research works [33][34][35][36][37][38][39]. However, only 6 of the 34 specimens failed by a single dominant mechanism, while the other 28 developed combined failure modes, characterized by two or three failure patterns.…”

Section: Characteristic Failure Modes and The Corresponding Ultimate Loadssupporting

confidence: 83%

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

et al. 2021

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This paper presents the outcomes of an experimental and numerical study performed on epoxy-bonded single lap joints (SLJs) between carbon fiber-reinforced polymer (CFRP) composite strips and steel elements. For the experimental program, 34 specimens were prepared by varying the type of the composite strip and the type of adhesives and their thicknesses; all specimens were loaded in axial tension up to failure. The specific failure mechanisms were identified and commented on the basis of the performed tests, and the load–displacement curves were plotted. Additionally, the strain distributions along the bond lengths at different load stages, the shear stress–displacements (slip) variations and the stress–strain distributions for the CFRP strips were plotted and investigated. The numerical simulations, based on 3D finite element method (FEM) analysis, provided consistent results, in good agreement with the experimental ones for all parameters that were investigated and discussed in this paper.

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Section: Characteristic Failure Modes and The Corresponding Ultimate Loadssupporting

confidence: 83%

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

et al. 2021

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“…To address these challenges, the authors plan to print a prototype-scale structure using the M28 mix and the 20 mm nozzle. The prototype will be tested in dynamic/seismic mode, and reinforcing methods will be designed based on the authors previously developed studies related to fiber-reinforced polymer materials and textile-reinforced mortars (Figure 27) [75][76][77][78][79][80][81]. The results indicate that the M27 mix printed with a 20mm nozzle had significantly higher values compared to the M28 mix printed with a 45mm nozzle.…”

Section: Discussionmentioning

confidence: 99%

A Novel Approach for 3D Printing Fiber-Reinforced Mortars

et al. 2023

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Three-dimensional printing with cement-based materials is a promising manufacturing technique for civil engineering applications that already allows for the design and the construction of complex and highly customized structures using a layer-by-layer deposition approach. The extrusion mechanism is one of the most expensive parts of the 3D printer. Also, for low-scale 3D printers, based on the shape of the extruder and the geometry limitation of the mixing blade, the 3D mixture is often limited to a narrow range of materials due to the risk of layer splitting or blockage. Therefore, there is a need to develop affordable and feasible alternatives to the current design–fabrication–application approach of 3D printers. In this paper, various newly designed mixtures of fiber-reinforced mortars that can be 3D printed using only a commercially available screw pump are analyzed based on their fresh properties and mechanical characteristics. The results, in terms of extrudability, buildability, flowability, and flexural and compressive strengths, highlight the potential of using this technology for constructing complex structures with high strength and durability. Also, the reduced facility requirements of this approach enable 3D printing to be made more available for civil engineering applications. With further innovations to come in the future, this method and these mixtures can be extended for the sustainable and economically feasible printing of single-family housing units.

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“…These efforts include the use of additive concrete, which involves materials like limestone filler, calcium sulfoaluminate cement, and cellulose fiber to enhance the overall strength and the interlayer properties of the 3DCP elements [7,8]. Additionally, heightening the mechanical performance of concrete has been explored by embedding fiber reinforced polymer bars, laminates, or micro-cables during the printing process [9][10][11]. Furthermore, the optimization of 3DCP workability has been pursued by incorporating solid waste materials such as gypsum, biochar, carbide slag, red mud, aluminum ash, and ashes from municipal solid waste incineration into the mixtures [12,13].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Cost-Efficient 3D Printed Concrete Reinforced with Polypropylene Fibers

Ungureanu,

Onuțu,

Țăranu

et al. 2023

Buildings

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Studying emerging and cutting-edge digital construction techniques, especially the utilization of 3D printing for concrete/mortar materials, holds significant importance due to the potential benefits that these technologies might offer over the traditional approach of casting concrete in place. In this study, a mixture composed of Portland cement, water, sand, limestone filler and polypropylene fibers was utilized for 3D printed concrete production towards the sustainable constructions approach. The benefits that sustain this statement include reduced construction time and material requirements, diminished error and cost, increase in construction safety, flexibility of architectural design, and improved quality with much less construction cost and waste. The microstructure, fresh and hardened mechanical properties of the polypropylene fiber reinforced 3D concrete were investigated. The results indicated that it is essential to attain a slump measurement of approximately 40 mm and a slump flow within the range of 140 to 160 mm, as stipulated by relevant standards (ASTM C1437 and C230/C230 M), in order to create a 3D concrete mixture suitable for extrusion. Also, the effects of printing parameters, fiber dosage, material composition, and other factors on the 3D printed concrete strength were discussed, and the corresponding adjustments were addressed.

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Numerical analysis of intralaminar damage evolution on various composite laminates

Cited by 12 publications

References 12 publications

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

A Novel Approach for 3D Printing Fiber-Reinforced Mortars

Microstructure and Mechanical Properties of Cost-Efficient 3D Printed Concrete Reinforced with Polypropylene Fibers

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