Tensile failure prediction of a short fiber or particle composite

Huang, Hongbo; Huang, Zheng‐Ming

doi:10.1002/pc.25864

Cited by 6 publications

(9 citation statements)

References 46 publications

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“…In this paper, a CCA (concentric cylinder assemblage) model together with infinity boundary conditions was chosen for the RVE geometry so that exact elastic solutions were available. In [ 35 ], a finite volume RVE containing a single short fiber specified with periodic boundary conditions was adopted. A numerical comparison study for all these different K 11 values was carried out, and is plotted in Figure 4 .…”

Section: Numerical Examplesmentioning

confidence: 99%

“…Although an un-convergent solution was reached, the differences of the resulting K 11 values between the use of t = 0.99 and t = 0.999 were less than 5%. Furthermore, the analytical K 11 derived in this work is essentially the same as that based on an FEM solution [ 35 ], although a finite RVE geometry with different boundary conditions has been used in the FEM approach. More details regarding the FEM approach can refer to [ 35 ].…”

Section: Numerical Examplesmentioning

confidence: 99%

“…In fact, only the axial SCFs of the matrix in an SFRC need to be determined, because the matrix’s SCFs in other directions are essentially the same as those of a CFRC. Very recently, we have preliminarily tried to obtain the longitudinal matrix SCF in an SFRC based on the FEM [ 35 ]. In [ 35 ], a 2D axial symmetry geometry representing the representative volume element (RVE) of an SFRC was established.…”

Section: Introductionmentioning

confidence: 99%

“…Very recently, we have preliminarily tried to obtain the longitudinal matrix SCF in an SFRC based on the FEM [ 35 ]. In [ 35 ], a 2D axial symmetry geometry representing the representative volume element (RVE) of an SFRC was established. A uniform displacement was imposed at the matrix end, and the resulting stress field of the matrix was used to determine the longitudinal tensile SCF of an SFRC.…”

Section: Introductionmentioning

confidence: 99%

“…Different from the definition of SCF in a CFRC, the RVE of the SFRC must be divided into three parts (i.e., a central segment and two end ones) according to the fiber aspect ratio, so that the SCF of the matrix tends to unity when the SFRC becomes a CFRC. The correctness of the longitudinal tensile SCF formula is double-checked against the numerical approach [ 35 ]. Based on the bridging model and the obtained longitudinal as well as other directional SCFs, the matrix’s true stresses are obtained.…”

Section: Introductionmentioning

confidence: 99%

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Tensile Strength Prediction of Short Fiber Reinforced Composites

et al. 2021

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Essentially, every failure of a short fiber reinforced composite (SFRC) under tension is induced from a matrix failure, the prediction of which is of fundamental importance. This can be achieved only when the homogenized stresses of the matrix are converted into true values in terms of stress concentration factors (SCFs) of the matrix in an SFRC. Such an SCF cannot be determined in the classical way. In this paper, a closed-form formula for the longitudinal tensile SCF in the SFRC is derived from the matrix stresses determined through an elastic approach. The other directional SCFs in an SFRC are the same as those in a continuous fiber composite already available. A bridging model was used to calculate the homogenized stresses explicitly, and a failure prediction of the SFRC with arbitrary fiber aspect ratio and fiber content was made using only the original constituent strength data. Results showed that the volume fraction, the aspect ratio, and the orientation of the fiber all have significant effect on the tensile strength of an SFRC. In a certain range, the tensile strength of an SFRC increases with the increase in fiber aspect ratio and fiber volume content, and the strength of the oriented short fiber is higher than that of the random short fiber arrangement. Good correlations between the predicted and the available measured strengths for a number of SFRCs show the capability of the present method.

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Section: Numerical Examplesmentioning

confidence: 99%

Section: Numerical Examplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tensile Strength Prediction of Short Fiber Reinforced Composites

et al. 2021

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Modelling on stress redistribution around broken fibers for fiber reinforced plastic with poor fiber distribution uniformity

Zhu

Jia

et al. 2022

Polymer Composites

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In order to calculate stress redistribution after a fiber breaking for unidirectional fiber reinforced plastic (FRP) with practically poor fiber distribution uniformity, a new and efficient FE model is developed with high computation efficiency. Based on the proposed FE model, the stress concentration factor (SCF) of intact fibers around a broken fiber is investigated for unidirectional FRP. It is observed that the SCF depends heavily on the local fiber volume ratio (FVR), and a modified analytical SCF model is proposed which takes into account the variation of local FVR. It is proved that the modified analytical SCF model can provide SCF values with much better accuracy for FRP with poor fiber distribution uniformity. The modified analytical SCF model would be very useful for accurate prediction of progressive fiber breaking in FRP.

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A multiscale scheme for homogenization to characterize the flexural performances of injection molded short glass fiber reinforced polyether ether ketone composites

Zhan,

Wu,

Zhao

et al. 2024

Polymer Composites

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The characterization of the flexural performances of short glass fiber reinforced polyether‐ether‐ketone (SGFR‐PEEK) composites fabricated by injection molding is a crucial and challenging task due to the process‐induced fiber orientation at different locations, resulting layered shell‐core‐shell microstructures and exhibiting large variations in mechanical performances. This article proposes a method for predicting the bending performance of SGFR‐PEEK and indicates the influence of fiber orientation on its bending behavior. This article reports a new scheme that combines multiscale homogenization with periodic microstructures and presents an experimental investigation of the flexural properties of SGFR‐PEEK composites. The distributions of fiber orientation through the thickness extracted from the micro‐computed tomography (μCT) were analyzed and reproduced with a layered skin‐shell‐core structure along the thickness at meso‐scale finite element model within representative volume elements (RVEs) of the macroscopic composites. Then, the effective properties of the RVEs were predicted using the homogenization method with the periodic boundary condition. The elastic modulus of skin‐shell‐core layers in the direction of flow are 4260.51, 4541.27, 4628.52, and 4630.84 MPa, respectively. The classical laminate theory (CLT) and the second homogenization implementation were then utilized in conjunction with the obtained mechanical properties of RVEs to predict the effective macrostructural behavior. The flexural modulus of the composite material was determined to be 5448.7 MPa through a three‐point bending test. The results obtained through lamination plate reinforcement theory and finite element simulation were 5887.4 and 5785.9 MPa, respectively, showing good agreement with the experimental findings. It is shown that the proposed multiscale scheme yields satisfactory agreement with experimental measurements. In addition, the effect of layered skin‐shell‐core microstructures on the flexural behavior was discussed.Highlights RVEs of layered shell‐core‐shell microstructures were generated with specified fiber orientations. The homogenization scheme with the periodic boundary condition was adopted to accurately predict each layer mechanical properties. The proposed multiscale scheme was compared with experimental results and yielded satisfactory predictions. The effect of layered skin‐shell‐core microstructures on the flexural behavior was thoroughly studied by the multiscale analytical approach.

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Tensile failure prediction of a short fiber or particle composite

Cited by 6 publications

References 46 publications

Tensile Strength Prediction of Short Fiber Reinforced Composites

Tensile Strength Prediction of Short Fiber Reinforced Composites

Modelling on stress redistribution around broken fibers for fiber reinforced plastic with poor fiber distribution uniformity

A multiscale scheme for homogenization to characterize the flexural performances of injection molded short glass fiber reinforced polyether ether ketone composites

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