Effects of needle punching process and structural parameters on mechanical behavior of flax nonwovens preforms

• DOI: 10.12989/aas.2019.6.2.157
• Publication Date: 2019-03-25
• Authors: Fatma Omrani; Damien Soulat; Manuela Ferreira; Peng Wang
• Keywords: mechanical characterization; [SPI]Engineering Sciences [physics]; forming; fabric; [SPI] Engineering Sciences [physics]; flax nonwoven; nonwoven preform

The production of nonwoven fabrics from natural fibers is already expanding at an industrial level for simple curvature semi-structural part in the automotive industry. To develop their use technical applications, this paper provides experimental study mechanical behavior flax-fiber preforms. A comparison between different sets carded needle-punched has been used to influence manufacturing parameters such as fibers\'directions, area and needle punching densities. We have found that anisotropy observed both directions can be reduced depending on these parameters. Furthermore, work investigates possibility form double parts a hemisphere well more complex shape square box which possesses four triple points. propose forming process adapted features structure. purpose determine under high stress during various settings. preforming tests allowed us observe real time defects deformability potential flax nonwoven.