Analysis of the in-plane shear behaviour of non-orthogonally textile reinforcements: Application to braided fabrics

Xiao, Shenglei; Wang, Peng; Soulat, Damien; Minet, Juliette; Zemni, Lilia; Gao, Hang

doi:10.1016/j.compositesb.2018.07.040

Cited by 21 publications

(15 citation statements)

References 52 publications

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“…Compared to flax fibre, the Polyamide (PA12) twining around the fibre yarn to present the mixed properties of Flax and PA12 is usually capable of serving as reinforcements [14]. Although Xiao et al [15] thoroughly discuss the in-plane shear behaviour of Flax/PA12 fabrics, the temperature during manufacturing can also affect the mechanical behaviour. Notably, the shear angle and its relationship to other conditions, such as force and deformation, is responsible for producing a simulated, reproducible curved form.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Mechanical Characterisations of Flax Fibre and Thermoplastic Resin Composites during Manufacturing

et al. 2018

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The flax fibre reinforced composites with advanced structure, which can be regarded as recyclable parts, are potential and promising materials in the automobile industry. During their manufacturing, the reinforcements or prepregs should be performed to the desired shape beforehand. Mechanical behaviours accordingly play an important role during this process. However, this preforming process is usually under high temperatures, thus, the mechanical behaviours could be modified under this state. Especially for reinforcements produced by flax yarns, has barely been studied. To fill this gap, in this paper the thermos-mechanical characterization of Flax/Polyamide12 (PA12) commingled yarn and prepreg woven fabric is analysed using tensile and in-plane shearing tests under different temperatures and tensile speeds. The results conclusively show that strength can be improved by increasing the temperature below the PA12 melting value on woven fabrics, which is inverse tendency for single yarn. Moreover, increasing tensile speed could increase the strength of the single yarn and fabric. This reveals that the PA12 fluidity has great influence on tensile behaviour. The characterisation results would be employed as prescriptive recommendations in the process of manufacturing flax fibre-reinforced composite parts.

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Section: Introductionmentioning

confidence: 99%

Thermo-Mechanical Characterisations of Flax Fibre and Thermoplastic Resin Composites during Manufacturing

et al. 2018

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“…

where u is the displacement, D is the diagonal of the rhombus of zone C in the initial condition, L c is the side of zone C, L a is the height of zone A, during the deformation, L c and L a are constant. Finally, the shear angle during the extension test can be demonstrated as Equation (7) [ 37 ].

…”

Section: Analytical Model Based On Unit Cell Geometrymentioning

confidence: 99%

“…“Bias-extension test” in axial or transversal directions can be applied for the study of in-plane shear of 2D biaxial braids since the braider tows are already bias interlaced and can be rotated with the existing intertow angle. Xiao et al developed a geometric criterion and an analytical model of bias-extension test for non-orthogonally textile structure in the dry-state, experimental and analytical results presented good agreement [ 37 ]. But there is no study yet on the in-plane shear behavior of braided preform at elevated temperature chamber.…”

Section: Introductionmentioning

confidence: 99%

“…This experimental approach is made with bias-extension tests, which can be easily performed in a small isothermal chamber. The 2D biaxial braided thermoplastic preform is made from flax/polypropylene (PP) hybrid yarn; the general analytical model of the bias-extension test established by Xiao et al [ 37 ] for non-orthogonally textile structure based on unit cell geometry is applied at elevated temperature for all the experiments. The experimental tests are performed at different temperatures and different displacement rates at first; this is necessary since the in-plane shear behavior is sensitive to the temperature and displacement rate due to the matrix’s thermo-dependent viscosity property [ 22 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Unit Cell Parameters on the Thermomechanical Non-Symmetric In-Plane Shear Behavior of 2D Biaxial Braided Preform for Thermoplastic Biocomposites

et al. 2022

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The identification of thermomechanical in-plane shear behavior of preform is one of the most important factors to ensure the quality of the thermoplastic composites during the thermoforming process. In this present work, the non-symmetric in-plane shear behavior of flax/polypropylene 2D biaxial braided preform for thermoplastic biocomposites was characterized at elevated temperature chamber by using bias-extension test. Analytical models of a bias-extension test based on non-symmetric unit cell geometry for 2D biaxial braids were defined and applied; the thermo-condition-dependent experiments were conducted to study the temperature and displacement rate dependences. The influence of unit cell geometry parameters including braiding angle, tow waviness, and cover factor on the thermal in-plane shear behavior was deeply invested, experiments in both axial and transversal directions were performed for a complete study, and asymmetric scissor mechanisms for in-plane shear behavior were introduced and studied. Finally, a simulation of thermal impregnation distribution based on unit cell geometry was made to clarify the importance of the overall fiber volume fraction.

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“…Scholars have conducted extensive researches on the damage evolution and failure characteristics of textile composites [ 19 ]. The damage mechanism of fiber-reinforced composites can be explored from the aspects of transverse microcracks, crack growth, fiber fracture, micro-delamination, and debonding of fibers [ 20 , 21 , 22 ]. Cui et al systematically studied the mechanical properties, progressive failure rule, and fracture mechanism of 3D5d braided composites at different braiding angles by using a split Hopkinson pressure bar [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Short Beam Shear Behavior and Failure Characterization of Hybrid 3D Braided Composites Structure with X-ray Micro-Computed Tomography

Sun

Xiang

et al. 2020

Polymers

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Three-dimensional braided composite has a unique spatial network structure that exhibits the characteristics of high delamination resistance, damage tolerance, and shear strength. Considering the characteristics of braided structures, two types of high-performance materials, namely, aramid and carbon fibers, were used as reinforcements to prepare braided composites with different hybrid structures. In this study, the longitudinal and transverse shear properties of 3D braided hybrid composites were tested to investigate the influences of hybrid and structural effects. The damage characteristics of 3D braided hybrid composites under short beam shear loading underwent comprehensive morphological analysis via optical microscopy, water-logging ultrasonic scanning, and X-ray micro-computed tomography methods. It is shown that the shear toughness of hybrid braided composite has been improved at certain degrees compared with the pure carbon fiber composite under both transverse and longitudinal directions. The hybrid braided composites with aramid fiber as axial yarn and carbon fiber as braiding yarn exhibited the best shear toughness under transverse shear loading. Meanwhile, the composites with carbon fiber as axial yarn and aramid fiber as braiding yarn demonstrated the best shear toughness in the longitudinal direction. Due to the different distribution of axial and braiding yarns, the transverse shear property of hybrid braided structure excels over the longitudinal shear property. The failure modes of the hybrid braided composite under the two loading directions are considerably different. Under transverse loading, the primary failure mode of the composites is yarn fracture. Under longitudinal loading, the primary failure modes are resin fracture and fiber slip. The extensive interfacial effects and the good deformation capability of the hybrid braided composites can effectively prevent the longitudinal development of internal cracks in the pattern, improving the shear properties of braided composites.

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Analysis of the in-plane shear behaviour of non-orthogonally textile reinforcements: Application to braided fabrics

Cited by 21 publications

References 52 publications

Thermo-Mechanical Characterisations of Flax Fibre and Thermoplastic Resin Composites during Manufacturing

Thermo-Mechanical Characterisations of Flax Fibre and Thermoplastic Resin Composites during Manufacturing

Influence of the Unit Cell Parameters on the Thermomechanical Non-Symmetric In-Plane Shear Behavior of 2D Biaxial Braided Preform for Thermoplastic Biocomposites

Short Beam Shear Behavior and Failure Characterization of Hybrid 3D Braided Composites Structure with X-ray Micro-Computed Tomography

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