Effects of fiber-type on the microstructure and mechanical properties of carbon/carbon composites

Hao, Ming-Yang; Luo, Ruiying; Xiang, Qiao; Hou, Zhenhua; Yang, Wei; Shang, Hai-dong

doi:10.1016/s1872-5805(14)60149-9

Cited by 13 publications

(6 citation statements)

References 20 publications

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“…For the oriented aligned short fiber-reinforced composites, the elastic modulus could be calculated by the rule of mixtures [11,12]…”

Section: Prediction Results Of Tensile Modulusmentioning

confidence: 99%

“…For the oriented aligned short fiber-reinforced composites, the elastic modulus could be calculated by the rule of mixtures [11,12] where l was the fiber length, d was the fiber diameter. In this work, the average fiber length for each model was considered as l. E m and E f were the longitudinal tensile modulus of matrix and fiber, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…As reviewed in the previous literatures, current theoretical analysis methods to the study of short fiber-reinforced composites can be classified into three types. The first method is the rule of mixtures [10,11], which is more suitable for in-plane isotropic material. In order to simplify calculating, the short carbon fiber layer in composites is considered as an isotropic material by many researchers [12,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Three-dimensional finite element models and tensile properties of carbon fiber needled felt reinforced composites

Song

Zhao

Chen

et al. 2019

Journal of Industrial Textiles

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In this study, the three-dimensional finite element models of carbon fiber needled felt reinforced composites were built by using the embedded element technique and the virtual yarn method. Three sizes of samples for carbon fiber needled felt reinforced composites were designed and prepared. The tensile properties were investigated by experiments and theoretical methods, and the influences of sample size on tensile modulus were discussed. The results showed that, the longitudinal tensile moduli of carbon fiber needled felt reinforced composites decreased with the increase of sample size. Compared with the rule of mixtures and the inclusion theory, the longitudinal tensile moduli obtained by finite element method were closer to the experimental values. In addition, the transverse tensile moduli obtained by finite element method were greater than that obtained by the rule of mixtures and the inclusion theory. That was due to the orientation of some fibers had a proportion along the thickness. It was concluded that, these three-dimensional finite element models can be used to investigate the elastic properties of carbon fiber needled felt reinforced composites with different sizes.

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“…For the oriented aligned short fiber-reinforced composites, the elastic modulus could be calculated by the rule of mixtures [11,12]…”

Section: Prediction Results Of Tensile Modulusmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional finite element models and tensile properties of carbon fiber needled felt reinforced composites

Song

Zhao

Chen

et al. 2019

Journal of Industrial Textiles

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show abstract

“…However, during this process, a large number of pores (voids) are formed resulting from the incomplete infiltration. Since it has been proved that the mechanical properties of the composites are strongly depended on their microstructures [7,8], the approaches which can precisely characterize the microstructures have obtained significant success on predicting the effective mechanical properties of composites.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of the influence of porosity on bending properties of 2D carbon/carbon composites

Chao

Tian

et al. 2018

Composites Part B: Engineering

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Numerical simulation with progressive damage criterion is implemented to investigate the effect of porosity on the bending properties of 2D cross-ply carbon/carbon (C/C) composites. The mechanical properties of Pyrocarbon matrix regarding the change of porosity are calculated by using Mori-Tanaka approach. Combining with the stiffness degradation scheme, the ultimate bending strengths are calculated in Abaqus though a user-defined subroutine (USDFLD). Delamination is modelled by inserting cohesive elements between two adjacent plies. A good agreement is obtained when the FEM results are compared to three-point bending experiments. The FEM results show that the bending strength decreases greatly with the increase of porosity. When the porosity reaches up to 18%, the bending strength is decreased by 57%. The major fracture behaviors are interlamination delamination and continuous crack damage in 90˚ plies. With the increase of porosity, more severe interlamination delamination will be slightly aggravated. In addition, the increase of porosity will also accelerate the damage in 90˚ plies.

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“…The morphology of needled felt has a deep impact on macroscopic properties, therefore detailed structural investigations are needed. The elastic modulus of needled felt reinforced composites can be obtained by the rule of mixtures, but the fiber length distribution is necessary [2,9,10]. Furthermore, the finite element model for needled felt reinforced composites needs 3D geometric models of needled felt.…”

Section: Introductionmentioning

confidence: 99%

Statistics-based full-scale three-dimensional geometric model and fiber length distribution for carbon fiber needled felt

Song

Zhao

et al. 2017

Journal of Industrial Textiles

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In this study, the fiber-shift method is presented to generate the three-dimensional geometric model of carbon fiber needled felt, and curved carbon fiber is regarded as beam under pure bending. The finite mixture model is applied to describe the fiber length distribution for the experiments and models. Closed model, open model and cut model are proposed, and cut model is thought to be more close to reality. A series of analytical methods are proposed to investigate the full-scale three-dimensional geometric model. The fiber-length distributions of cut models with different dimensions are obtained. The results show that, with the increasing of border length of cut model, the percentage of carbon fiber been cut is getting smaller, and the average fiber length is increased. In addition, the compression and needling process of pre-needling technique are simulated, and the needling hole obtained by simulation is similar to reality.

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Effects of fiber-type on the microstructure and mechanical properties of carbon/carbon composites

Cited by 13 publications

References 20 publications

Three-dimensional finite element models and tensile properties of carbon fiber needled felt reinforced composites

Three-dimensional finite element models and tensile properties of carbon fiber needled felt reinforced composites

Numerical evaluation of the influence of porosity on bending properties of 2D carbon/carbon composites

Statistics-based full-scale three-dimensional geometric model and fiber length distribution for carbon fiber needled felt

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