Nesting in textile laminates: geometrical modelling of the laminate

Lomov, Stepan Vladimirovitch; Verpoest, Ignace; Peeters, Teo; Roose, Dirk; Zako, Masaru

doi:10.1016/s0266-3538(02)00318-4

Cited by 147 publications

(105 citation statements)

References 24 publications

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“…The reductions in average layer thickness of 2 and 6 layer stacks of twill weave fabrics in comparison with the single layer thickness were 8 % and 16 %, respectively. The highest reduction in average layer thickness of plain woven fabric compared to its single layer with increase in number of layers shows that layers nest better in plain fabric compared to twill and sateen fabrics which is in accordance with the previous study [26]. As one would expect from Fig.…”

Section: Woven Fabricssupporting

confidence: 91%

“…6, it can be seen that there is a reduction in the average layer thickness of all these fabrics with increasing number of layers, which is considered to be due to nesting of the layers [8]. This observation of reduction of average layer thickness with increasing number of layers is in agreement with the literature [7,11,17,26]. It can be seen from Fig.…”

Section: Woven Fabricssupporting

confidence: 87%

“…From Fig. 8, it can also be seen that fibre volume fraction of the three structures increases with increase in number of layers which is due to nesting of layers in multilayer stack [8,11,26]. …”

Section: Woven Fabricsmentioning

confidence: 85%

“…In the case of NCF-2 (0°,90°), the thickness reduction with increasing number of layers was more marked. This can be explained by the fact that in non-crimp stiched fabrics, the thickness reduction in multilayer fabrics is supported by presence of stitched yarn on the fabric surface which allow the layer surface to nest with each other [26]. Coarse stitch yarn on the fabric surface will support higher nesting than fine stitch yarn.…”

Section: Non-crimp Fabricsmentioning

confidence: 99%

“…The compression response of multilayer preforms differs from that of a single layer due to the opportunity of nesting of the layers. The nesting behaviour was discussed by Lomov et al [26]. Resin permeability through fabrics due to the nesting effect has been studied by various researchers [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Tow Architecture on Compaction and Nesting in Textile Preforms

2016

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Transverse compression response of tows during processes such as vacuum infusion or autoclave curing has significant influence on resin permeability in fabrics as well as the laminate thickness, fibre volume fraction and tow orientations in the finished composite. This paper reports macro -scale deformations in dry fibre assemblies due to transverse compaction. In this study, influence of weave geometry and the presence of interlacements or stitches on the ply-level compaction as well as nesting have been investigated. 2D woven fabrics with a variety of interlacement patterns -plain, twill and sateen-as well as stitched Non-crimp (NCF) fabrics have been investigated for macro-level deformations. Compression response of single layer and multilayer stacks has been studied as a function of external pressure in order to establish nesting behaviour. It appears that the degree of individual ply compaction and degree of nesting between the plies are influenced by tow architectures. Inter-tow spacing and stitching thread thickness appears to influence the degree of nesting in non-crimp fabrics.

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Section: Woven Fabricssupporting

confidence: 91%

Section: Woven Fabricssupporting

confidence: 87%

Section: Woven Fabricsmentioning

confidence: 85%

Section: Non-crimp Fabricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Tow Architecture on Compaction and Nesting in Textile Preforms

2016

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Mesh superposition‐based multiscale stress analysis of composites using homogenization theory and re‐localization technique considering fiber location variation

Sakata

Tanimasu

2021

Numerical Meth Engineering

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In this article, the accuracy of multiscale stress analysis of heterogeneous materials (unidirectional fiber-reinforced composite) was improved by considering microscopic geometrical variation using the mesh superposition method. When analyzing the stress distribution in a composite with the finite element method considering the variation of the fiber location, updating the mesh significantly is necessary; however, generating an appropriate mesh for a large geometrical variation is difficult. Therefore, we focused on the mesh superposition method, which can easily generate a numerical FE model, even if the internal structure is complex, because the matrix and inclusion can be expressed by the global mesh and local mesh independently. However, in the original mesh superposition method, the analysis accuracy may be degraded owing to the mesh overlap conditions. Therefore, an improved method was applied to the homogenization theory-based analysis. In this article, the effectiveness of the proposed approach was discussed by comparing the numerical results of this method with those of conventional mesh superposition method and standard finite element method.From the numerical results, accuracy improvement by the proposed approach for the multiscale stochastic stress analysis is confirmed.

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Transmission of ultraviolet light through reinforcement fabrics and its effect on ultraviolet curing of composite laminates

et al. 2008

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The ultraviolet transmission of various reinforcement textiles was quantified experimentally for the case of incidence of light normal on the fabric plane, and correlated with the curing behavior of laminates incorporating these fabrics. For glass fiber fabrics wetted with polyester resin, light is transmitted through the voids between the fiber bundles and through the fiber bundles. Multiscale modeling of the fabric geometry allows the local transmission to be estimated and the average total transmission to be quantified. The results of curing experiments suggest that the degree of throughcure achieved after a given cure time is correlated to the fabric transmission. Both are determined by the laminate thickness, the fabric architecture and the fiber volume fraction, i.e., the fiber packing density. While the transmission is reduced by the presence of the reinforcement fabrics, the total resin volume is reduced when compared with that of a resin only sample of the same thickness. A lower radiation dose is sufficient for curing, which partially compensates for the effect of reduced transmission. POLYM. COMPOS., 29:818-829, 2008. ª

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Nesting in textile laminates: geometrical modelling of the laminate

Cited by 147 publications

References 24 publications

Influence of Tow Architecture on Compaction and Nesting in Textile Preforms

Influence of Tow Architecture on Compaction and Nesting in Textile Preforms

Mesh superposition‐based multiscale stress analysis of composites using homogenization theory and re‐localization technique considering fiber location variation

Transmission of ultraviolet light through reinforcement fabrics and its effect on ultraviolet curing of composite laminates

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