Different experimental ways to minimize the preforming defects of multi-layered interlock dry fabric

Shanwan, Anwar; Allaoui, Samir

doi:10.1007/s12289-018-1407-6

Cited by 9 publications

(6 citation statements)

References 27 publications

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“…Controlling the shock between yarns in the preforming process is one of the methods to reduce defects. Furthermore, introducing a matted fabric between plies can also reduce friction [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

Gao

Zhang

et al. 2021

Polymers

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Carbon-Kevlar hybrid reinforcement is increasingly used in the domains that have both strength and anti-impact requirements. However, the research on the preforming behaviors of hybrid reinforcement is very limited. This paper aims to investigate the mechanical and preforming behaviors of carbon-Kevlar hybrid reinforcement. The results show that carbon-Kevlar hybrid woven reinforcement presents a unique “double-peak” tensile behavior, which is significantly different from that of single fiber type reinforcement, and the in-plane shear deformation demonstrates its large in-plane shear deformability. Both the tensile and in-plane shear behaviors present insensitivity to loading rate. In the preforming process, yarn slippage and out-of-plane yarn buckling are the two primary types of defects. Locations of these defects are closely related to the punch shape and the initial yarn direction. These defects cannot be alleviated or removed by just increasing the blank holder pressure. In the multi-layer preforming, the compaction between the plies and the friction between yarns simultaneously affect the quality of final preforms. The defect location of multi-layer preforms is the same as that of single-layer, while its defect range is much wider. The results found in this paper could provide useful guidance for the engineering application and preforming modeling of hybrid woven reinforcement.

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Section: Resultsmentioning

confidence: 99%

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

Gao

Zhang

et al. 2021

Polymers

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“…The pre-forming stage is the key link in the manufacturing of carbon fiber reinforced composite parts. According to previous studies [ 6 , 7 , 8 ], pre-forming progress can cause fabric/fabric and fabric/metal tool friction. It should be emphasized that friction may eventually result in the local defects of carbon fabrics [ 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Friction Behavior between Carbon Fiber Plain Weave and Metal Semi-Cylinder Tool

Guo

Xie

et al. 2023

Polymers

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The deformations that occur during composite forming processes are governed by the friction between the fabrics and tooling material on the mesoscopic level. The effect of normal load and multi-plies on the frictional behavior of the carbon plain weave is investigated by simulating the friction between the fabric and metal semi-cylinder tool by using the experimental method. The periodic wavy friction-displacement curve between the metal tool and fabric is caused by the interwoven structure of the fabric. Both the increase in the normal load and the number of layers cause an increase in the real contact area during friction, leading to an increase in the friction force. The real contact area is calculated based on the Hertzian contact model and the self-designed testing method. The friction force values obtained from multiplying the real contact area with shear strength are closely aligned with the measured results.

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“…Wrinkles defects were widely studied in various studies [7,10,11]. Shanwan et al [12] have proposed several experimental strategies to reduce their appearance or sometimes even completely avoid them. As for the mesoscopic defects, they are still not completely understood.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of woven fabrics forming defects

Shanwan

2023

Materials Research Proceedings

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Abstract. The manufacturing of composite materials can be ensured by several industrial processes, like Liquid Composite Molding (LCM). This technology is used to produce composite parts with complex geometries because it provides a very good compromise in terms of repeatability, production rates and cost. During the forming phase of an LCM process, a fabric can be formed by highly double curved punch geometries where it could be submitted to several deformations and mechanical stresses that lead to the appearance of different types of defects: buckles, gapping, in-plane pull-out, etc. In order to understand their phenomenology, different types of defects were generated inside samples of glass and carbon fabrics so as to understand their mechanisms of appearance. This work focuses on the phenomenology of appearance of forming defects and the definition of experimental parameters allowing the generation of calibrated defects, such as buckles and gapping, inside samples of glass and carbon woven fabrics. The definition of these parameters allows the manufacturing of composite parts with calibrated defects, which in turn helps to define the influence of these defects on the mechanical behavior of composites materials.

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Different experimental ways to minimize the preforming defects of multi-layered interlock dry fabric

Cited by 9 publications

References 27 publications

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

Analysis of the Mechanical and Preforming Behaviors of Carbon-Kevlar Hybrid Woven Reinforcement

Friction Behavior between Carbon Fiber Plain Weave and Metal Semi-Cylinder Tool

Experimental study of woven fabrics forming defects

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