Experimental investigation of the tensile and bending behavior of multi-axial warp-knitted fabric composites

Gao, Xiaoping; Li, Danxi; Wu, Wei; Chen, Si

doi:10.1177/0040517516679155

Cited by 15 publications

(14 citation statements)

References 17 publications

(28 reference statements)

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“…In Ref. , although V f is similar to that of this study, the type of the fiber is E‐glass fiber. Because the stiffness and the strength of the E‐glass fiber are less than those of the T700 carbon fiber, the mechanical properties of the corresponding composites are inevitably poorer.…”

Section: Resultssupporting

confidence: 59%

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Experimental and numerical investigation on three‐point bending behaviors of unidirectional warp‐knitted composites

Hong

Yan

Guo

et al. 2019

J of Applied Polymer Sci

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This study develops a novel specimen model, which considers the progressive damage of the layers, the knitting yarns, and the interlaminar cohesive zone, to investigate the flexural properties and the interlaminar shear properties of the unidirectional warpknitted composites. Three-point bending tests are conducted as verification of the numerical model. Improved strain-based Hashin criteria are proposed to analyze the shear nonlinearity. Results show that specimens with small span-to-thickness ratios exhibit obvious nonlinear behaviors and the corresponding simulation results are sensitive to the value of the shear nonlinear factor. Failure mechanism and stress distributions are analyzed based on numerical simulations. The effect of the specimen size on bending behaviors is discussed. The influence of the width is found to be negligible but that of the span-to-thickness ratio is significant. The ranges of the span-tothickness ratio corresponding to different failure modes are given.

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Section: Resultssupporting

confidence: 59%

“…performed three‐point bending tests to measure the flexural strength and the interlaminar shear strength of the warp‐knitted composites. Gao et al . analyzed the influence of the fiber orientation and the fiber volume fraction on bending behaviors experimentally.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on three‐point bending behaviors of unidirectional warp‐knitted composites

Hong

Yan

Guo

et al. 2019

J of Applied Polymer Sci

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“…The silane A-1387 content at 1.2wt% of epoxy hardener mixture was dispersed in the mixture. The 3DOWC was manufactured by means of Vacuum Assisted Resin Transfer Molding [22].…”

Section: Composite Preparationmentioning

confidence: 99%

“…In this part, the bending stress (s) and strain (e) were calculated according to equations (2) and (3). Then, the bending modulus was evaluated based on initial elastic part of bending stress and strain curve using equation (4) [22].…”

Section: Stress-strain Curvesmentioning

confidence: 99%

Fatigue behavior of 3-D orthogonal woven composite with silane modification

Zhang

Gao

Tao

2020

Mater. Res. Express

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As key part in wind turbine, the blade is a vital component for energy transformation. Fiber reinforced composite has advantage of light weight, large specific strength and specific stiffness, which has been used in wind turbine blade. In order to avoid delamination of conventional laminate and debonding between fiber and epoxy, the silane modification composite specimen reinforced with 3-D orthogonal woven fabric/epoxy was prepared using vacuum assisted resin transfer molding (VARTM) for blade. As for fatigue experiment, the critical stress levels corresponding to micro-crack initiation and failure of composite were obtained by combining of acoustic emission technology and quasi-bending experiment. The fatigue behavior of 3-D orthogonal woven composite with silane modification was experimental evaluated based on the minimum and maximum stress levels. The fatigue behavior, such as S-N curve, stress-strain behavior and stiffness degradation behavior were analyzed. The result will provide the basis for investigation of bending behavior with nondestructive tests and set of stress level in bending fatigue experiment.

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“…Wilhelmsson et al 3 found that the fiber waviness strongly impairs the compression behavior of composites and the maximum fiber misalignment can be used to accurately predict strength with analytical kinking criteria. Gao et al 4 fitted the tensile and bending stress–strain curves of the multiaxial warp-knitted composites (MWC) into a quadratic function relationship, which can be used to predict the stress corresponding to the strain. Yang et al 5 compared the compression property of 3-D orthogonal woven glass fiber composites with biaxial warp-knitted glass fiber composites and found that the compression strength of the former was 23.40% higher than that of the latter, and the modulus of the former was 4.9% lower than that of the latter.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on compression property of multiaxial warp-knitted composites

Yang

Wang

Gao

et al. 2019

High Performance Polymers

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The wind turbine blades are exposed to various environments all the year round, especially temperature variations during the four seasons. To study the influences of temperatures on the mechanical properties of composite materials, the compression property in the 0°, 45°, and 90° directions of the multiaxial (triaxial and quadaxial) glass fiber warp-knitted composites at −30°C, 0°C, 20°C, and 40°C was analyzed, respectively. The stress–strain curves, strength, modulus, failure strain, and the relationship between strength and temperature were obtained. The results indicated that the compression performance decreased with the increase of temperature, and the effect of temperature on quadaxial composite was more significant than that of the triaxial composite. In addition, the failure mechanisms were also analyzed according to the fracture modes and scanning electron microscopic morphologies of composites.

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Experimental investigation of the tensile and bending behavior of multi-axial warp-knitted fabric composites

Cited by 15 publications

References 17 publications

Experimental and numerical investigation on three‐point bending behaviors of unidirectional warp‐knitted composites

Experimental and numerical investigation on three‐point bending behaviors of unidirectional warp‐knitted composites

Fatigue behavior of 3-D orthogonal woven composite with silane modification

Temperature effect on compression property of multiaxial warp-knitted composites

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