Numerical and Experimental Investigations on Deep Drawing of G1151 Carbon Fiber Woven Composites

Gherissi, Abderraouf; Abbassi, Fethi; Ammar, Amine; Zghal, Ali

doi:10.1007/s10443-015-9468-x

Cited by 20 publications

(15 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the forming process, the shoulder area, the neck and flange area near the shoulder are subject to the pulling force and radial in-plane squeeze forces, which results in the in-plane compression deformation occurring in the [0°/90°] position (see Figure 16a) and in-plane shear deformation occurring in the [−45°/45°] position (see Figure 16b). In the [0°/90°] position, the wrinkles appear due to the squeeze of the matrix and fibers caused by the in-plane compression deformation while, in the [−45°/45°] position, the wrinkles will appear only when the shear angle θ1, θ2 caused by the in-plane shear deformation is greater than the “locking angle” [27,37].…”

Section: Discussionmentioning

confidence: 99%

Formability and Failure Mechanisms of Woven CF/PEEK Composite Sheet in Solid-State Thermoforming

Zheng

Gao

et al. 2019

Polymers

View full text Add to dashboard Cite

In this study, the formability of woven carbon-fiber (CF)-reinforced polyether-ether-ketone (PEEK) composite sheets in the solid-state thermoforming process were investigated, and the failure mechanisms were discussed. The formability of the woven CF/PEEK sheets were analyzed using flexural tests, Erichsen test, and microscopic observation. The results show that the formability of CF/PEEK sheets significantly increases as the temperature rises from 165 to 325 °C, and slightly decreases as the deformation speed rises from 2 to 120 mm/min. The deformation of the sheets is caused by plastic deformation, shear deformation and squeeze deformation, without plastic thinning and fiber slippage, which is due to the restriction of the solid matrix and locked fibers. Moreover, the wrinkles will cause fiber fracture at lower temperatures and delamination at higher temperatures. At higher temperatures, the wrinkles mainly occur at the position with [0°/90°] fibers due to the squeezing of the matrix and fibers.

show abstract

Section: Discussionmentioning

confidence: 99%

Formability and Failure Mechanisms of Woven CF/PEEK Composite Sheet in Solid-State Thermoforming

Zheng

Gao

et al. 2019

Polymers

View full text Add to dashboard Cite

show abstract

“…This reinforcement was an interlock fabric shown in Figure 3b. It has been studied and used as a test reinforcement in several investigations concerning the draping of preforms [22,[76][77][78][79] and in particular the ITOOL project [80]. It consisted of an interlock weaving of 6K carbon yarns and the thickness of each ply of the stack was 1.3 mm.…”

Section: Symmetrical Bending With Clamped Endsmentioning

confidence: 99%

Simulation of Wrinkling during Bending of Composite Reinforcement Laminates

et al. 2020

View full text Add to dashboard Cite

When a thick laminate is subjected to bending, under certain boundary conditions, wrinkles may appear and develop due to the inextensibility of the fibers. Wrinkling is one of the most critical defects in composite manufacturing. Numerical simulation of the onset and growth of such wrinkles is an important tool for defining optimal process parameters. Herein, several bending experiments of thick laminates are presented. They were found to lead to severe wrinkling and delamination of different kinds. It is shown that the history of loading changed the developed wrinkles. Stress resultant shell finite elements specific to textile reinforcement forming show their relevance to provide, for these wrinkles induced by bending, results in good agreement with the experiments, both with regard to the onset of the wrinkles and to their development. This numerical approach was used to improve the understanding of the phenomena involved in wrinkling and to define the conditions required to avoid it in a given process.

show abstract

“…When woven fabric is under external force, the rotation of yarns at their crossovers will occur. The variation in the angle of warp and weft yarns after deformation is defined as "shear angle: g." 31 As shown in Figure 8, assuming that the angle between warp and weft before deformation is 90 , the resulting deformation due to external load will change the angle to q, so, g ¼ 90 À q. The critical angle is called locking shear angle (g locking ).…”

Section: Shear Anglementioning

confidence: 99%

The influence of yarn fineness and number of yarn layers on in-plane shear properties of 3-D woven fabric

Guan

Jiao

2020

Advanced Composites Letters

View full text Add to dashboard Cite

The 3-D layer-to-layer angle-interlock woven fabric (LLAIWF) has good deformability on a complicated contour, which offers them a large application potential in the field of aerospace. This article mainly focuses on the influence of yarn fineness and number of yarn layers on in-plane shear properties of 3-D LLAIWF during bias extension. Two methods of varying the thickness of 3-D LLAIWF were designed: changing yarn fineness and changing the number of yarn layers. The deformation mechanism of LLAIWF in bias-extension test was analyzed. The effects of two methods on in-plane shear deformation were compared and analyzed. In addition to the data processing on the experimental curve, digital image correlation analysis was conducted on the test photographs, from which shear angles in different area shear angle were measured. The mesostructure of fabric during the bias-extension test was observed. The effect of decreasing yarn layers on the mesostructure of fabric was observed by cutting fabric. The results demonstrated that the yarn fineness and the number of yarn layers play a key role in the in-plane shear properties of 3-D LLAIWF. In addition, the changing of fabric thickness causes that the deformation is asymmetrical. The effect of warp yarn fineness is similar to that of weft yarn fineness during the bias-extension test. Reducing the internal yarns of the fabric created a gap, where the yarns were reduced. This gap will affect the deformability of the fabric.

show abstract

Numerical and Experimental Investigations on Deep Drawing of G1151 Carbon Fiber Woven Composites

Cited by 20 publications

References 25 publications

Formability and Failure Mechanisms of Woven CF/PEEK Composite Sheet in Solid-State Thermoforming

Formability and Failure Mechanisms of Woven CF/PEEK Composite Sheet in Solid-State Thermoforming

Simulation of Wrinkling during Bending of Composite Reinforcement Laminates

The influence of yarn fineness and number of yarn layers on in-plane shear properties of 3-D woven fabric

Contact Info

Product

Resources

About