Modeling of tensile and bending properties of biaxial weft knitted composites

Demircan, Özgür; Ashibe, Shinsuke; Kosui, Tatsuya; Nakai, Asami

doi:10.1515/secm-2013-0274

Cited by 7 publications

(12 citation statements)

References 4 publications

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“…reported that the tensile properties of BWK reinforced composites could be successfully estimated with finite element modelling. 26 Hessami et al. 21 examined tensile and flexural behaviour of the BWK reinforced composites using experimental and finite element modelling methods.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on stiffness and damage of glass/epoxy biaxial weft-knitted reinforced composites

Shekarchizadeh

Nedoushan

Dastan

et al. 2020

Journal of Reinforced Plastics and Composites

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This paper deals with investigating the tensile characteristics of biaxial weft-knitted reinforced composites in terms of stiffness, strength and failure mechanism. The biaxial weft-knitted fabric was produced on an electronic flat knitting machine by E-glass yarns and then was impregnated with epoxy resin. Using an accurate geometrical model, the composite unit cell was designed in Abaqus software’s environment. Tensile tests were simulated in different directions on the created unit cell and the stiffness was calculated. By applying the proper failure theories, the composite strength was predicted and then critical regions of the unit cell were determined. In the next step, a micromechanical approach was also applied to estimate the same tensile features. Failure theories were also applied to predict the strength and most susceptible areas for failure phenomenon in the composite unit cell. The tensile properties of the produced composites were measured and compared with outputs of the finite element and micromechanical approaches. The results showed that the meso-scale finite element analysis approach can well predict the composite strength. In contrast, the meso-scale analytical equation model was not able to predict it acceptably because this model ignores the strain concentration. Both meso-scale finite element analysis and meso-scale analytical equation approaches predicted the similar locations for the composite failure in wale and course directions.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on stiffness and damage of glass/epoxy biaxial weft-knitted reinforced composites

Shekarchizadeh

Nedoushan

Dastan

et al. 2020

Journal of Reinforced Plastics and Composites

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“…In order to simplify the investigation of textile structures, lots of methods including the analytical method (used for meso-mechanical parameters) and numerical method (mostly known as the finite element method) are available. The good agreement between the experimental and analytical results of the composites tensile and bending properties found by Demircan et al is considered as the high ability of finite element method for simulating the mechanical behavior of biaxial weft-knitted composites [123].…”

Section: Modeling the Mechanical Properties Of Bwkfsmentioning

confidence: 65%

“…Besides the experimental investigations, Demircan et al developed a theoretical model in order to investigate the mechanical performance of biaxial weft-knitted composites [3,123]. In general, textile fabrics with periodic structures are difficult to be investigated in terms of elastic properties of a unit cell.…”

Section: Modeling the Mechanical Properties Of Bwkfsmentioning

confidence: 99%

Biaxial weft-knitted fabrics as composite reinforcements: A review

Hasani

Hassanzadeh

Abghary

et al. 2016

Journal of Industrial Textiles

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Textile products are considered as an acceptable alternative for commonly used composite reinforcement due to their lightweight as well as relatively high specific strength and stiffness. Among the variety of textile structures which could be employed in composite manufacturing, the role of weft-knitted fabrics is almost very limited. This is because employing the weft-knitting technology would provide such structures with inferior mechanical properties due to their highly looped construction as well as low fiber volume fraction. But on other hand, it is important to be noted that some advantages such as high energy absorption, good impact resistance, and formability of knitted structures made the researchers to focus on investigating different methods by which the inferior mechanical properties of ordinary weft-knitted fabrics could be improved. Inserting the reinforcing yarns through the warp and weft direction of the knitted fabrics is considered as one of the effective solution for improving their mechanical behavior which eventually leads to a high potential product called as biaxial weft-knitted fabrics. In this literature, it is aimed to review different aspects of novel designed biaxial weft-knitted fabrics which could be suitable for a broad area of technical application such as composite reinforcements.

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“…A simulation approach would reduce the developing time and cost. Therefore, many models for various textile structures such as woven fabrics [9,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29], 3D woven fabrics [30,31,32,33,34,35,36], non-crimp fabrics [37], weft-knitted fabrics [17,38,39,40,41,42,43,44,45,46,47], and multiaxial warp-knitted fabrics [48] were developed. The models could be classified by the mathematical approach: Analytical [44,49,50] or numerical models, in which they are divided into smaller groups by the length scale of the modelled components into three categories: Micro-scale models [20,21,35,36,39], meso-scale models [16,17,18,19,22,31,32,33,34,37,40,41,42,…”

Section: Introductionmentioning

confidence: 99%

“…A composite unit cell with 3D tetrahedral elements coupled with a matrix mesh helps to predict the mechanical behavior of the weft-knitted reinforced composite. Similar approaches using a meso-scale model on a repeated unit cell are also used for numerical analysis of the mechanical behavior of the weft-knitted structure [40,42,46] or weft-knitted reinforced composite structure [38,47,53,54]. The obtained properties can be transferred to macro-scale model for further analysis.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modelling of the Mechanical Behaviour of Biaxial Weft-Knitted Fabrics on Different Length Scales

et al. 2019

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Weft-knitted fabrics offer an excellent formability into complex shapes for composite application. In biaxial weft-knitted fabric, additional yarns are inserted in the warp (wale-wise) and weft (course-wise) directions as a reinforcement. Due to these straight yarns, the mechanical properties of such fabrics are better than those of unreinforced weft-knitted fabrics. The forming process of flat fabrics into 3D preforms is challenging and requires numerical simulation. In this paper, the mechanical behavior of biaxial weft-knitted fabrics is simulated by means of macro- and meso-scale finite element method (FEM) models. The macro-scale modelling approach is based on a shell element formulation and offers reasonable computational costs but has some limitations by the description of fabric mechanical characteristics and forming behavior. The meso-scale modelling approach based on beam elements can describe the fabric’s mechanical and forming characteristics better at a higher computational cost. The FEM models were validated by comparing the results of various simulations with the equivalent experiments. With the help of the parametric models, the forming of biaxial weft-knitted fabrics into complex shapes can be simulated. These models help to predict material and process parameters for optimized forming conditions without the necessity of costly experimental trials.

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Modeling of tensile and bending properties of biaxial weft knitted composites

Cited by 7 publications

References 4 publications

Experimental and numerical study on stiffness and damage of glass/epoxy biaxial weft-knitted reinforced composites

Experimental and numerical study on stiffness and damage of glass/epoxy biaxial weft-knitted reinforced composites

Biaxial weft-knitted fabrics as composite reinforcements: A review

Numerical Modelling of the Mechanical Behaviour of Biaxial Weft-Knitted Fabrics on Different Length Scales

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