Multiscale modeling of combined deterministic and stochastic fabric non-uniformity for realistic resin injection simulation

Endruweit, A.; Zeng, Xuesen; Long, Andrew

doi:10.1179/2055035914y.0000000002

Cited by 11 publications

(9 citation statements)

References 31 publications

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“…Liquid composite molding (LCM) includes a number of composite manufacturing techniques [1][2][3][4][5], all of which require a vital, yet time-consuming preforming step. In recent past, preforming has been achieved by 2D/3D weaving, fabric draping, and stitching.…”

Section: Introductionmentioning

confidence: 99%

Transverse permeability of dry fiber preforms manufactured by automated fiber placement

Aziz

Ali

Zeng

et al. 2017

Composites Science and Technology

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This work presents a correlation between the transverse permeability of a preform and the process variability of the automated dry fiber placement manufacturing technique. In this study, an experimental and numerical analysis of the dry tape preform, with a focus on its through-thickness permeability, has been undertaken. Geometric models, containing flow channels of two different width dry tape carbon preforms, have been created in the TexGen modeller. A Computational fluid dynamics (CFD) simulation has been undertaken to obtain the predicted through-thickness-permeability of the dry tape preform. A parametric study on the effect of different dry tape gap sizes on the permeability of the preform is presented. An in-situ compaction study, carried out in an X-CT machine, revealed that the gap sizes were irregular throughout the manufactured preforms. In addition, an experimental investigation of the through-thickness permeability, which is based on a saturated flow condition at a thickness corresponding to full vacuum pressure, is also presented. The permeability prediction based on the X-CT re-constructed geometric model has been validated using the experimental data. A further parametric study has revealed that the process variablity in automated dry fibre placement influences the through-thickness permeability by a factor of upto 5.

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Section: Introductionmentioning

confidence: 99%

Transverse permeability of dry fiber preforms manufactured by automated fiber placement

Aziz

Ali

Zeng

et al. 2017

Composites Science and Technology

Self Cite

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“…It has been shown that there is an optimum of flow front speed which is minimizing the void formation in the composite structure [19][20][21]. Furthermore it is well known that the amount of voids is indirect proportional to mechanical properties of composites [29][30][31]. According to Fig.…”

Section: Discussionmentioning

confidence: 99%

Influence of processing parameters on quality factors of one-shot hybrid structures made by RTM

Hergan

Beter

Stelzer

et al. 2018

Prod. Eng. Res. Devel.

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This paper is dealing with the influence of processing parameters for manufacturing of steel-carbon-fiber-reinforced-plastic (CFRP) hybrid plates by using the one-shot-hybrid resin-transfer-moulding (OSH-RTM) process. A design of experiments study was carried out. The quality of the manufactured parts was quantified by the bending modulus, the apparent interlaminar shear strength (ILSS), the maximum deflection and the density of the CFRP. The following changeable processing parameters were chosen: mould temperature, resin temperature, change in mass flow and maximum injection pressure. It is shown that the mould temperature and the change in mass flow show significant impact on the flexural modulus, density and maximum deflection of the plate while there is no significant impact on the apparent ILSS. Furthermore, the interaction between the mould temperature and resin temperature is having an influence on the flexural modulus and density.

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“…Specifically, NCF reinforcements are deformed when they are compacted into the mold during the preforming process. For multilayered preforms, the interaction between adjacent fabric layers intensifies and the tows in adjacent fabric layers push each other, which directly affects the global permeability [12,[18][19][20][21][22][23][24][25][26][27]. Therefore, permeability computation methods have related the geometry models to the geometrical perturbations due to deformation.…”

Section: Introductionmentioning

confidence: 99%

Study of Compaction Properties and Permeability Prediction of Multilayered Quadriaxial Non-Crimp Fabric in Liquid Composite Molding Process

et al. 2020

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A systematic experimental study was performed to detect the compaction and permeability properties of multilayered biaxial and quadriaxial preforms under vacuum pressure. Compression response on ply level showed that the degree of nesting between quadriaxial NCF was more pronounced and the nesting deformation mechanism was affected by the interaction with stitch yarns. Owing to the meso-channels in the fibrous structure and the nesting between layers, the in-plane permeability of quadriaxial NCF did not follow an inverse proportion relationship with the fiber volume fraction. To predict the in-plane permeability of multilayered quadriaxial NCFs, unit cell models at a high level of geometrical details were built, including local variations in yarn cross-sections and the nesting deformation between layers. Numerical methods were implemented, and the prediction results were in very good agreement with the experimental data. Besides, the major contributing parameters to the enhancement of the in-plane permeabilities were identified by investigating the correlation between permeability and structural parameters of quadriaxial NCF. The modeling methodology and the principles established can be applied to the design of the quadriaxial NCF fabrics, where the permeability enhancement was evidenced.

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Multiscale modeling of combined deterministic and stochastic fabric non-uniformity for realistic resin injection simulation

Cited by 11 publications

References 31 publications

Transverse permeability of dry fiber preforms manufactured by automated fiber placement

Transverse permeability of dry fiber preforms manufactured by automated fiber placement

Influence of processing parameters on quality factors of one-shot hybrid structures made by RTM

Study of Compaction Properties and Permeability Prediction of Multilayered Quadriaxial Non-Crimp Fabric in Liquid Composite Molding Process

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