Evaluating the number of fibre orientations required in homogenization schemes to predict the elastic response of long fibre sheet moulding compound composites from X-ray computed tomography measured fibre orientation distributions

Sabiston, Trevor; Pinter, Pascal; Lévesque, Julie; Weidenmann, Kay André; Inal, Kaan

doi:10.1016/j.compositesa.2018.08.032

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…The fiber length and distribution in the fiber‐reinforced melt are closely related to process parameters, which also have an important impact on the cell structure, EMI SE, and mechanical properties of the composite. Different fiber distribution results in different performance 19,26–28 . Figure 2(a) shows three different specimen positions of the composites and Figure 2(b) gives the histogram of CF length of solid and foamed CF/PP composites in the same condition.…”

Section: Resultsmentioning

confidence: 99%

“…Different fiber distribution results in different performance. 19,[26][27][28] Figure 2(a) shows three different specimen positions of the composites and Figure 2(b) gives the histogram of CF length of solid and foamed CF/PP composites in the same condition. Overall, both have similar CF distribution and shorter fiber length due to fiber breakage in screw.…”

Section: Fiber Length Distribution and Rheological Behaviormentioning

confidence: 99%

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Effect of microstructure induced by microcellular injection molding on electromagnetic interference shielding properties

Liu

Guan

et al. 2021

J of Applied Polymer Sci

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Preparing lightweight and versatile products is the unremitting goal of industry to save resources and energy. Lightweight carbon fiber reinforced polypropylene (CF/PP) composite foams with high‐performance electromagnetic interference (EMI) shielding materials were fabricated by microcellular injection molding (MIM) technology. The average length and distribution of CF in CF/PP composite foams were examined. Thanks to the introduction of foaming process, the average CF length of composite foams was 33.98% longer than that of solids, which effectively enhanced the electrical conductivity and EMI shielding properties. The effect of shot size, gas content, and injection rate on the electrical conductivity and EMI properties was investigated. With melt shot size of 2/3 of the cavity volume, gas content of 0.5 wt% N2 and injection rate of 100 mm/s, optimal cellular structure of the composite material was obtained. The EMI shielding effectiveness (SE) reaches 36.94 dB, which is the highest value achieved by using MIM technology to the best of the authors' knowledge. In addition, the mechanical properties of cellular structure can still maintain good values, with the tensile strength and impact strength improved by 15.3% and 14.03%, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Fiber Length Distribution and Rheological Behaviormentioning

confidence: 99%

Effect of microstructure induced by microcellular injection molding on electromagnetic interference shielding properties

Liu

Guan

et al. 2021

J of Applied Polymer Sci

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“…The position on the plate is defined by the center of each cuboid. A similar approach is described in [33] to evaluate the fiber orientation of SMC materials. In total, five positions were measured and evaluated to map the fiber orientation distribution over the whole plate.…”

Section: Methodsmentioning

confidence: 99%

Model Calibration and Data Set Determination Considering the Local Micro-Structure for Short Fiber Reinforced Polymers

et al. 2021

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To ensure the usability of parts made of fiber-reinforced polymers, a lifetime assessment has to be made in an early stage of the development process. To describe the whole life cycle of these parts, continuous simulation chains can be used. From production to the end of the service life, all influences are mapped virtually. The later material strength is already given after the manufacturing process due to the process dependent fiber alignment. To be able to describe this fiber orientation within the lifetime assessment, this paper presents an approach for model calibration and data set determination to consider the local micro-structure. Therefore, quasi-static and cyclic tests were performed on specimens with longitudinal and transversal fiber orientation. A supplementary failure analysis provides additional information about the local micro-structure. The local fiber orientation is determined with µCT (micro computer tomography)-measurements, correlated to the extraction positions of the specimen, and implemented in a dataset. With an attached lifetime calculation on a demonstrator, a major influence of the local micro-structure on the calculation results can be shown. Therefore, it is indispensable to consider the local fiber orientation in the data set determination of short fiber reinforced polymers.

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“…Such data provide a method to build models that are based on actual microstructures, and there are many examples of this in the literature. For instance, Sabiston et al [26] established a Functionally Graded Interphase (FGI) model, using XCT-measured fibre orientation distributions, to predict the elastic response of long fibre sheet moulding compound composites. Straumit et al [27] applied image processing methods (structure tensor) to XCT images to construct realistic models of woven carbon-epoxy composites.…”

Section: Introductionmentioning

confidence: 99%

3D finite element modeling of water diffusion behavior of jute/PLA composite based on X-ray computed tomography

Jiang

et al. 2020

Composites Science and Technology

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A three-dimensional (3D) finite element (FE) modeling approach, which includes the true internal microstructure of short plant fibre reinforced composites, is proposed to accurately simulate water diffusion behavior. The volume fraction, dimension and orientation distribution of jute fibres in a jute/PLA composite were acquired by segmentation of X-ray computed tomographs (XCT). Surface meshes of the jute fibre and PLA matrix were imported into Abaqus Finite Element (FE) software to establish a 3D model that was used to simulate water diffusion behavior at 23ºC. The predicted results were in good agreement with experimental measurements.

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Evaluating the number of fibre orientations required in homogenization schemes to predict the elastic response of long fibre sheet moulding compound composites from X-ray computed tomography measured fibre orientation distributions

Cited by 11 publications

References 32 publications

Effect of microstructure induced by microcellular injection molding on electromagnetic interference shielding properties

Effect of microstructure induced by microcellular injection molding on electromagnetic interference shielding properties

Model Calibration and Data Set Determination Considering the Local Micro-Structure for Short Fiber Reinforced Polymers

3D finite element modeling of water diffusion behavior of jute/PLA composite based on X-ray computed tomography

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