Composites Forming

Boisse, Philippe; Akkerman, Remko; Cao, Jian; Chen, Julie; Lomov, Stepan V.; Long, A.C.

doi:10.1007/978-2-287-72143-4_5

Cited by 15 publications

(11 citation statements)

References 46 publications

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“…Characterisation of the deformability of reinforcements via testing and/or meso-modelling of deformation provides input for macro-modelling of the drapability, used for optimisation of the preform architecture and process conditions. High cost of the materials used make adequate simulation tools essential for industry and drive the wide research efforts worldwide [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Full-field strain measurements in textile deformability studies

Lomov¹,

Boisse²,

Deluycker³

et al. 2008

Composites Part A: Applied Science and Manufacturing

196

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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Section: Introductionmentioning

confidence: 99%

Full-field strain measurements in textile deformability studies

Lomov¹,

Boisse²,

Deluycker³

et al. 2008

Composites Part A: Applied Science and Manufacturing

196

118

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“…wrinkling, tearing) determine the product quality. Simulation tools that link product quality to material, mold and process parameters are being developed to support design and process optimization [1][2][3]. The prediction of local deformations is an essential task within this objective.…”

Section: Introductionmentioning

confidence: 99%

Optical strain fields in shear and tensile testing of textile reinforcements

Willems

Lomov

Verpoest

et al. 2008

Composites Science and Technology

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“…While most of the effort is focused on developing constitutive models to represent the behaviour of the dry fabric during draping [3], it has been evidenced in recent studies that the forming cannot be considered adiabatic: when the laminate contacts the tool, its temperature rapidly decreases which can lead to local rigidification and formation of wrinkles. The thermomechanical models proposed thus far are either isothermal [4] or assume an homogeneous temperature field in the blank at the beginning of the forming step [5], which is complex to achieve in practice given the low conductivity of the polymers.…”

Section: Introductionmentioning

confidence: 99%

Towards a coupled heating-forming simulation of the thermoforming of thermoplastic composites

Baumard

Menary

Almeida

et al. 2017

AIP Conference Proceedings

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Abstract.A strategy for the simulation of the whole thermoforming process, from the infrared heating to the stamping, is presented here. Two loosely coupled simulation tools are being developed: the first one computes a realistic 3D, transient temperature field of the composite stack inside an infrared oven, considering the radiative, conductive and convective heat transfers; the temperature distribution is used as an input for the second that aims at simulating the thermomechanical behaviour of the composite during the forming step via a non-orthogonal constitutive model. The steps for the identification of the model parameters are introduced. Initial validation tests show realistic results in term of shear angle distribution.

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Composites Forming

Cited by 15 publications

References 46 publications

Full-field strain measurements in textile deformability studies

Full-field strain measurements in textile deformability studies

Optical strain fields in shear and tensile testing of textile reinforcements

Towards a coupled heating-forming simulation of the thermoforming of thermoplastic composites

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