Experimental investigation of the draping properties of reinforcement fabrics

Wang, J.; Page, John; Paton, Rowan

doi:10.1016/s0266-3538(97)00115-2

Cited by 101 publications

(46 citation statements)

References 9 publications

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“…The bias extension test used in this study is an off-axis tensile test that can be used to measure intraply shear properties, while allowing potential slip. Intraply slip can either occur as 'cross-over' or 'inter-tow' 6 [12]. To achieve a uniform shear zone, a symmetric cross-ply or weave is located 45° off-axis compared to the tension direction.…”

Section: Theorymentioning

confidence: 99%

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On the in-plane deformability of cross-plied unidirectional prepreg

Larberg

Åkermo

Norrby

2011

Journal of Composite Materials

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PostprintThis is the accepted version of a paper published in Journal of composite materials. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. AbstractThe work presented herein aims to investigate the in-plane properties of cross-plied unidirectional prepreg using the bias extension method. The study is focusing on different generations of carbon fibre/epoxy material systems and testing is performed at elevated temperatures to enhance formability. Using digital image correlation (DIC), the specimen deformation and fibre rotation is captured during tests. The study shows that most cross-plied unidirectional material deforms at different characteristic length scales as deformation continues: first seemingly continuous and later in form of bands.Further, the different type of prepreg materials investigated behaves differently; for one type the pin-jointed net theory fit well, enabling simple estimation of resulting fibre angle, while for the another two not. Different loading speed and temperatures are investigated in order to pin-point its influence on the deformability.

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Section: Theorymentioning

confidence: 99%

“…2. The test piece should have a ratio length to width ratio larger than two to experience a relatively uniform shear zone A [6]. The samples tested in this study have a ratio of 5.…”

mentioning

confidence: 99%

On the in-plane deformability of cross-plied unidirectional prepreg

Larberg

Åkermo

Norrby

2011

Journal of Composite Materials

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“…The in-plane shear behavior characterization of woven composite reinforcements is usually done using the picture frame test or the bias extension test [17][18][19][22][23][24][25]. The bias extension test is simpler to performed because the fibres oriented at ±45°are not subject to possible spurious tension interfering in the picture frame test.…”

Section: Description Of the Testmentioning

confidence: 99%

“…The warp and weft directions are orientated at ±45°to the direction of the applied tensile load (Fig. 2a) [24,25]. The bias test specimen is held by two grips composed with two metal plates of 150 mm by 30 mm tightened with 6 screws.…”

Section: Description Of the Testmentioning

confidence: 99%

Analyses of the Deformation Mechanisms of Non-Crimp Fabric Composite Reinforcements during Preforming

Bel

Boisse

Dumont³

2011

Appl Compos Mater

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“…In this experiment, a tensile test is performed on a rectangular specimen in which the warp and weft directions of the tows are orientated initially at ±45°to the direction of the applied tensile load (Fig. 4) [21,[35][36][37][38][39]. When the specimen is stretched from L to L + d (see Fig.…”

Section: Bias Extension Testmentioning

confidence: 99%

Full-field strain measurements in textile deformability studies

Lomov¹,

Boisse²,

Deluycker³

et al. 2008

Composites Part A: Applied Science and Manufacturing

193

118

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Full-field strain measurements are applied in studies of textile deformability during composite processing: (1) in testing of shear and tensile deformations of textiles (picture frame, bias and biaxial extension test) as an ''optical extensometer'', allowing accurate assessment of the sample deformation, which may differ significantly from the deformation applied by the testing device; (2) to study mechanisms of the textile deformation on the scale of the textile unit cell and of the individual yarns (meso-and micro-scale full-field strain measurements); (3) to measure the 3D-deformed shape and the distribution of local deformations (e.g., shear angles) of a textile reinforcement after draping, providing input data for the validation of material drape models and for the prediction of the consolidated part performance via structural finite element analysis. This paper discusses these three applications of the full-field strain measurements, providing examples of studies of deformability of woven (glass, glass/PP) and non-crimp (carbon) textile reinforcements. The authors conclude that optical full-field strain techniques are the preferable (sometimes the only) way of assuring correct deformation measurements during tensile or shear tests of textile.

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Experimental investigation of the draping properties of reinforcement fabrics

Cited by 101 publications

References 9 publications

On the in-plane deformability of cross-plied unidirectional prepreg

On the in-plane deformability of cross-plied unidirectional prepreg

Analyses of the Deformation Mechanisms of Non-Crimp Fabric Composite Reinforcements during Preforming

Full-field strain measurements in textile deformability studies

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