Experimental and numerical analyses of textile reinforcement forming of a tetrahedral shape

Allaoui, Samir; Boisse, Philippe; Chatel, Sylvain; Hamila, Nahiene; Hivet, Gilles; Soulat, Damien; Vidal‐Sallé, Emmanuelle

doi:10.1016/j.compositesa.2011.02.001

Cited by 152 publications

(98 citation statements)

References 52 publications

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“…A specific device presented into details in Section 2 has been developed at the lab in collaboration with EADS Company to reach this goal [23,24]. This device is also particularly interesting because the link between the mechanical behavior of the studied reinforcement and its formability can be carried out.…”

Section: Introduction and Context Of The Studymentioning

confidence: 99%

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

et al. 2012

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:This experimental work concerns the study of the preforming of a specific highly double curved geometry with a triple point (case corner) by the sheet forming process using powdered interlock reinforcement (G1151 ® ). Three different punches (square box, prism, tetrahedron) were used in this study, each of them presenting highly double curved geometry with a case corner. A specific sheet forming device specially designed for the preforming of textile reinforcement was used. The expected shapes with the three punches have been obtained with an optimized blank-holder pressure. No classical defaults such as wrinkling or yarn damage are present in the useful zone of the preforms. However, a new default, not observed for spherical or hemispherical shape has been identified. It concerns the out of plane buckling of yarns. This phenomenon not observed on the square box is visible on some faces and edges of the prismatic and tetrahedron shapes. For the square box, it is easily possible to control the orientation of the yarn within the preform in the faces, whereas this is not possible for triangular faces 2 of the prismatic and tetrahedron shapes. The square box punch is therefore more adapted to preform the highly doubled curved shape with the case corner.

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Section: Introduction and Context Of The Studymentioning

confidence: 99%

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

et al. 2012

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“…Der erste Schritt bei diesem Verfahren, die Herstellung des Faser-Preforms, stellt mit einem Anteil von mehr als 50% der gesamten Produktionskosten dabei den größten Kostentreiber dar [4]. Eine besondere Herausforderung ist die Herstellung von Preforms mit großen Umformgraden, bei der herkömmliche Textilien beim Drapieren an physikalische Grenzen stoßen [5].…”

Section: Introductionunclassified

Reibverhalten von trockenen Faserstrukturen aus einem direkten Faserablageprozess

Ufer¹

2016

Zeitschrift Kunststofftechnik

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“…Concerning the effect of the mesoscopic defects, except some studies on the effect of the fibre waviness on the UD composite [17][18][19], there are few studies to our knowledge on this aspect [21]. However, it has been shown that they are more recurring during complex preforms shaping [6,10]. In addition, the inter-ply sliding increases significantly the amount and extent of these defects when multi-layered composite shaping is concerned [21], hence the need of understanding the phenomena involving and their criticality on the obtained composite.…”

Section: Introductionmentioning

confidence: 99%

“…Studies focused on the shear angle reached during the process compared to the locking angle described this relationship [1][2][3][4]. Recent numerical studies [5][6][7] shown that, because of being an out-of-plane phenomenon, the bending behavior of the membrane should be taken into account in order to correctly describe the shape and size of the wrinkles. A coupling between shear and tension has been highlighted in different papers [8][9][10] and wrinkles can therefore be avoided or delayed by applying tension along the yarn's network.…”

Section: Introductionmentioning

confidence: 99%

Effect of mesoscopic out-of-plane defect on the fatigue behavior of a GFRP

Cruanes

Shanwan

Méo

et al. 2018

Mechanics of Materials

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This paper deals with the influence of buckles that are a mesoscopic out of plane defects on the fatigue behavior of a GFRP. Three cases were investigated: Healthy samples with no defect and specimens with buckles defects that are first generated in the longitudinal direction and then on the transverse direction.. First, static tests were used to measure the differences of the mechanical properties of both defect orientations and, thanks to digital image correlation, to see where were localized the areas of maximal local strain on the samples. Secondly, fatigue tests were performed in the three configurations. The results revealed that both defect orientations have a significant effect on the fatigue life and on the strain field. The configuration with defects in the transverse direction is the most crippling condition as expected from the static tests but the longitudinal direction configuration was also very affected by the presence of the mesoscopic defects. Those observations lead to conclude that this mesoscopic out of plane defect has a major negative influence on the fatigue life of such a composite.

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Experimental and numerical analyses of textile reinforcement forming of a tetrahedral shape

Cited by 152 publications

References 52 publications

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

Reibverhalten von trockenen Faserstrukturen aus einem direkten Faserablageprozess

Effect of mesoscopic out-of-plane defect on the fatigue behavior of a GFRP

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