Characterization and statistical analysis of the mechanical behavior of knitted structures used to reinforce composites: Yarn compositions and float stitches

Zilio, Lucas; Dias, Mariana; Santos, Thiago; Santos, Caroliny; Fonseca, Rubens; Amaral, Adriano; Aquino, Marcos

doi:10.1016/j.jmrt.2020.05.089

Cited by 12 publications

(6 citation statements)

References 45 publications

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“…The obtained formulas for calculating values of the physical and mechanical characteristics are similar in structure to those given in a number of studies for layered symmetrically reinforced composites [17,20,25]. This is explained by the interdependence of geometry, rigidity, and loads which maintain certain proportions.…”

Section: 4supporting

confidence: 69%

“…However, no common analytical model of deformation of woven composites was provided in the literature so far. First of all, this is explained by the complexity of constructing discrete models of inhomogeneous woven structures taking into account curvature and interweaving of reinforcing material and computational difficulties in obtaining results of calculation of internal state parameters of the materials in a complex stressed state [17].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…In contrast to the use of the theory of layered media [17,20], the application of the rod model makes it possible to reduce the number of required experimental elastic constants to four. For example, to describe the considered composites in accordance with the theory of layered media, it is necessary to experimentally determine five physical and mechanical characteristics.…”

Section: Experimental Studies Of Physical and Mechanical Characteristmentioning

confidence: 99%

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Determining the mechanical characteristics of composite materials reinforced with woven preforms

Kondratiev¹,

Andrieiev²,

Shevtsova³

2021

EEJET

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Reduction of the complexity of production of articles from composite materials is largely ensured by the use of reinforcing semi-finished products in which fibers pre-form a framework. Among all the variety of reinforcing systems, woven sleeves (preforms) occupy a special place. The high degree of deformability in a nonimpregnated condition makes it possible to lay this reinforcement on any surface without folds and cuts that provide preservation of strand continuity. This advantage of woven sleeves is accompanied by a change in local reinforcement angles and, consequently, the variable nature of physical and mechanical characteristics of the curved part surface. A method for calculating physical and mechanical characteristics of the composite based on preforms at any point of the part depending on the pattern of laying strands on a curved surface has been developed. The possibility of application of the rod model of the composite to describe physical and mechanical characteristics of the composite material with a woven reinforcement was analyzed. The model essence consists in that the composite is modeled by a diamond-shaped rod system. The rhombus sides serve as fibers and the diagonals as the binder. To verify the theoretical results and substantiate practical recommendations, a series of experimental studies were performed based on the formation of material specimens from two types of woven sleeves with different reinforcement angles. The experimental study program included tensile, bending, and compression tests. A fairly good convergence of theoretical and experimental data was obtained. For example, a square of the correlation coefficient was not less than 0.95 for the modulus of elasticity, not less than 0.8 for the Poisson's ratio, and not less than 0.9 for tensile and compressive strengths. This is the rationale for using the rod model to describe the considered class of composites. The use of the developed procedure will make it possible to increase the perfection of the considered class of designs and obtain rational parameters of the process of their manufacture.

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Section: 4supporting

confidence: 69%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Experimental Studies Of Physical and Mechanical Characteristmentioning

confidence: 99%

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Determining the mechanical characteristics of composite materials reinforced with woven preforms

Kondratiev¹,

Andrieiev²,

Shevtsova³

2021

EEJET

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“…Tensile, flexural, and compression testing were performed on the composites to look at their tensile, flexural, and compressive properties. Several workers [11,12] have explored the feasibility of using polymer-based composites made of sisal fibers due to the low cost of production of these materials and the various fabrication processes they are compatible with. The processing of these composites was found to be fairly simple and inexpensive.…”

Section: Introduction *mentioning

confidence: 99%

Influence of Laying Angles in Reinforcement of Epoxy in Sisal Plain Woven Structures

Gopinath¹,

Suresh

2022

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This study is about microstructure characterization and understanding the flexural properties of plain-woven sisal fabric reinforced epoxy composites. Vibrational Spectroscopy (FTIR) and SEM (Scanning Electron Microscopy) were used to describe the plain-woven sisal fabric and sisal fiber reinforced epoxy composites. Two laying angles were incorporated into the epoxy resin (10 percent), i.e. [0°/90°] and [0°/45°]. To isolate the effect of epoxy type and whether woven sisal fibers were used, an analytical design that is based on [0°/90°] and [0°/45°] orientation used the results. Epoxy treated with woven sisal fibers had a higher tensile (0.62 GPa) and flexural modulus (0.69 GPa) with tensile (17 MPa) and flexural strength (14 MPa) while being applied to a surface that is sloped at 0°/45° and which generates a displacement force of approximately 12 mm and strain 15.8 %. While conventional Weibull failure theory has long been widely used to explain the failure of brittle bulk materials, this new equation integrates that theory with the lay angle effect on flexural strength in plain sisal to calculate flexural strength reinforcement in epoxy. This new method can be applied to any fiber reinforcement, regardless of the type, and in terms of the failure of that reinforcement, which is governed by linear elastic fracture mechanics, and agreement between experimental data sets is excellent. According to our expectations, this theoretical study is going to provide a new method for the advanced strain engineering system to be built using reinforced fibers.

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“…On the other hand, the stitch of tuck is a loop that retains held yarn during its formation process. In contrast, the float stitch consumes less yarn and occurs when the needle machine does not operate or does not pick up the knitting yarn [ 13 ]. Scientific literature with topics about advanced knitting or knitting engineering and technology have been discussed about each stitch of knitted fabric structure promoting the most significant changes in intrinsic properties of knitted fabric.…”

Section: Introductionmentioning

confidence: 99%

Impact of yarn compositions, loop length, and float stitches on the mechanical behavior of knitted fabrics via full factorial design and RSM

Santos

Zilio

et al. 2023

Heliyon

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Characterization and statistical analysis of the mechanical behavior of knitted structures used to reinforce composites: Yarn compositions and float stitches

Cited by 12 publications

References 45 publications

Determining the mechanical characteristics of composite materials reinforced with woven preforms

Determining the mechanical characteristics of composite materials reinforced with woven preforms

Influence of Laying Angles in Reinforcement of Epoxy in Sisal Plain Woven Structures

Impact of yarn compositions, loop length, and float stitches on the mechanical behavior of knitted fabrics via full factorial design and RSM

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