Characterization and Analysis of In-Plane Shear Behavior of Glass Warp-Knitted Non-Crimp Fabrics Based on Picture Frame Method

Habboush, Ali; Sanbhal, Noor; Shao, Huiqi; Jiang, Jinhua; Chen, Nanliang

doi:10.3390/ma11091550

Cited by 12 publications

(6 citation statements)

References 33 publications

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“…The shear angle, which is commonly defined as the change of the angle between warp and weft tows, is an important parameter that describes the highly nonlinear shear behavior. 17,20,[31][32][33][34][35][36][37][38] When a fabric is subject to in-plane shear, the initial deformation is primarily dominated by fiber tow rotation with a negligible shear force that is mainly caused by the friction between the tows induced by the normal pressure exerted at the intersections. 17,20,31,32,34,36,39 As the shear angle further increases, fiber rotation becomes difficult because the initial gaps between the tows are closed and the fiber tows are compressed against each other at the side, resulting in an increase in the shear force.…”

Section: Deformation Modes Of a Fabricmentioning

confidence: 99%

A textile architecture-based discrete modeling approach to simulating fabric draping processes

Wei

Zhang

2023

Journal of Industrial Textiles

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Fabric draping, which is referred to as the process of forming of textile reinforcements over a 3D mold, is a critical stage in composites manufacturing since it determines the fiber orientation that affects subsequent infusion and curing processes and the resulting structural performance. The goal of this study is to predict the fabric deformation during the draping process and develop in-depth understanding of fabric deformation through an architecture-based discrete Finite Element Analysis (FEA). A new, efficient discrete fabric modeling approach is proposed by representing textile architecture using virtual fiber tows modeled as Timoshenko beams and connected by the springs and dashpots at the intersections of the interlaced tows. Both picture frame and cantilever beam bending tests were carried out to characterize input model parameters. The predictive capability of the proposed modeling approach is demonstrated by predicting the deformation and shear angles of a fabric subject to hemisphere draping. Key deformation modes, including bending and shearing, are successfully captured using the proposed model. The development of the virtual fiber tow model provides an efficient method to illustrate individual tow deformation during draping while achieving computational efficiency in large-scale fabric draping simulations. Discrete fabric architecture and the inter-tow interactions are considered in the proposed model, promoting a deep understanding of fiber tow deformation modes and their contribution to the overall fabric deformation responses.

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Section: Deformation Modes Of a Fabricmentioning

confidence: 99%

A textile architecture-based discrete modeling approach to simulating fabric draping processes

Wei

Zhang

2023

Journal of Industrial Textiles

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“…Guzman-Maldonado et al 6 and Habboush, Sanbhal, Shao, Jiang and Chen. 15 The current work will also use the picture frame test.…”

Section: Fiber Angle Deviations and In-plane Shear In An Ncfmentioning

confidence: 99%

Setting bounds for in-plane shear induced fiber angle deviations in bi-axial non-crimp fabrics

Zeeuw

Peeters

Bergsma

et al. 2022

Journal of Industrial Textiles

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For pick-and-place processes to become widely implemented in industry a consistent and acceptable product quality needs to be achieved. In the state of the art it is assumed that reinforcements will be in perfect condition at the start of forming or draping. In reality the handling process can already result in undesired deformations. The current work will look at fiber angle deviations that occur during this process due to in-plane shear. It is shown that bounds can be set for these fiber angle deviations based on experimental work. Periodic representative volume element homogenization is used to obtain homogenized material properties for a bi-axial non-crimp fabric with a specific construction. With these material properties the in-plane shear strain, and thus the fiber angle deviations, can be predicted. The presented methodology and results obtained using it can be a basis in the design process for automated handling of reinforcements and for in-situ quality control of the pick-and-place process.

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“…5,6 Numerical modeling can also help much to understand the draping process deeply and define its parameters. 7 Understanding the fabric behavior is especially important for the relatively new and promising structures such as warp knitted non-crimp fabrics (WKNCFs), 8 to discover their potential and drawbacks through manufacturing processes, particularly during the forming of complexshaped parts. 2,9 It is a pressing need to accurately characterize and predict these reinforcements behavior in the draping procedure.…”

Section: Characterization and Analysis Of Wrinkling Behavior Of Glassmentioning

confidence: 99%

“…17,18 Since the warp-knitting technique is the most flexible and versatile method to produce NCFs, 8 WKNCFs can be produced with a wide range of areal densities from light to quite heavy fabrics with any staking sequence desired for the application. 8,19 The fabric structure difference between WKNCFs and other fabric architectures makes defect formation mechanisms relatively different due to the presence of stitching yarn. 20 Thus, their behavior as multi-axial multi-layer fabrics should be deeply investigated.…”

Section: Warp Knitted Non-crimp Fabricsmentioning

confidence: 99%

“…16 The in-laid knitted constructions combine excellent processability due to the ability to use dry fibers, with exceptional mechanical properties due to there is "no crimp" in the currying-load yarns. 17,18 Since the warp-knitting technique is the most flexible and versatile method to produce NCFs, 8 WKNCFs can be produced with a wide range of areal densities from light to quite heavy fabrics with any staking sequence desired for the application. 8,19 The fabric structure difference between WKNCFs and other fabric architectures makes defect formation mechanisms relatively different due to the presence of stitching yarn.…”

Section: Warp Knitted Non-crimp Fabricsmentioning

confidence: 99%

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Characterization and analysis of wrinkling behavior of glass warp knitted non-crimp fabrics based on double-dome draping geometry

Habboush

Sanbhal

Shao

et al. 2020

Journal of Engineered Fibers and Fabrics

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The good formability of textile composite materials over complex mold geometries is one of the reasons to make their use expanding in various modern industries. However, different defects in these reinforcements could have occurred during the forming step in the manufacturing process. The defects are arising for many reasons; some are related to the fabric itself and others related to the draping parameters. Understanding the textile structure mechanics and draping behavior is essential to choose the proper reinforcement as well as to attain better simulation. Fabric wrinkles and local out-of-plane bucking of yarns were the fundamental defects in focus. The main objective of this part of the project was to experimentally investigate and compare the draping behavior of six commercially available glass fabrics from the same category of warp-knitted non-crimp fabrics (WKNCFs). The tested fabrics included two stitching patterns: tricot and chain. Also, they were relatively heavy with approximate mass per square meter. A double-dome punching test was performed to implement draping for each fabric; then, the defects were detected and characterized. Punching load-displacement curves were also recorded. In addition, a defect code was designated for the main defects to characterize forming defects at the meso-macroscopic scale. The structure and the number of fabric axes, stacking sequence, and stitching pattern all contribute to defect formation during draping. The studied configurations in this paper can help in studying the simulation of deformed technical fabric and provide a method to minimize and even eliminate the draping defects.

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Characterization and Analysis of In-Plane Shear Behavior of Glass Warp-Knitted Non-Crimp Fabrics Based on Picture Frame Method

Cited by 12 publications

References 33 publications

A textile architecture-based discrete modeling approach to simulating fabric draping processes

A textile architecture-based discrete modeling approach to simulating fabric draping processes

Setting bounds for in-plane shear induced fiber angle deviations in bi-axial non-crimp fabrics

Characterization and analysis of wrinkling behavior of glass warp knitted non-crimp fabrics based on double-dome draping geometry

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