Investigation about the Effect of Manufacturing Parameters on the Mechanical Behaviour of Natural Fibre Nonwovens Reinforced Thermoplastic Composites

Gnaba, Imen; Wang, Peng; Soulat, Damien; Omrani, Fatma; Ferreira, Manuela; Vroman, Philippe

doi:10.3390/ma12162560

Cited by 10 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Needle punched non‐woven (some with zero punch density) mats have been investigated in the past for use in non‐composite applications such as filters, geotextiles, and so on; [ 10,13–15 ] as well as in composite applications (thermoplastics [ 4,7,16–18 ] and thermosets [ 1,19–24 ] ). An increase in mat areal density, [ 10 ] needle punch density, and depth have been found to decrease the air permeability [ 14,15 ] and increase the compactness of the dry natural fiber mats.…”

Section: Introductionmentioning

confidence: 99%

Effect of non‐woven flax mat manufacturing parameters and consolidation pressure on properties of composites manufactured using vacuum‐assisted resin transfer molding

2021

View full text Add to dashboard Cite

Composite parts, used in transportation industries, are manufactured using vacuum‐assisted resin transfer molding (VARTM) and non‐woven glass fiber mats that are optimized for impregnation, fiber volume fraction (Vf), and composite properties. However, such optimized hemp and flax mats are not available. Extending the research on hemp mats manufactured using air‐laying, the effect of needle depth (2 or 8 mm) and punch density (0–72 punches/cm2) used to bind the fibers in the mat together, as well as consolidation pressure (101–560 kPa) applied during manufacturing, on mat permeability and composite properties were studied. Non‐woven flax mats exhibited heterogeneity in spatial distribution of areal density (GSM) and fiber distribution. This, together with the distribution in flax fiber diameter and properties, resulted in large scatter in the measured composite properties. The out‐of‐plane permeability and the consolidation of the mat decreased with increase in punch density and depth. This, together with the variation of Vf in the starting mat, resulted in complex variation in the Vf in the composite. 30‐P mat, with tightly bound fibers, resulted in optimal composite properties at VARTM (101 kPa) pressure while 0‐P and 72‐P mats, with loosely bound fibers, resulted in optimal properties at 560 kPa.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of non‐woven flax mat manufacturing parameters and consolidation pressure on properties of composites manufactured using vacuum‐assisted resin transfer molding

2021

View full text Add to dashboard Cite

show abstract

“…Several works reported similar results, 17,27–29 apart from the peculiar case of needle-punched nonwovens in which CD behaved like MD. 30–32…”

Section: Introductionmentioning

confidence: 99%

“…Several works reported similar results, 17,[27][28][29] apart from the peculiar case of needle-punched nonwovens in which CD behaved like MD. [30][31][32] This work attempts to assess individual and coupled effects of anisotropy and strain rate on the tensile response of calendered nonwovens, accounting also for the variation in fabric's planar density. To this end, the material microstructure was first characterised with digital imaging techniques and, then, several uniaxial tests were carried out on fabrics with different planar density at various strain rates and loading directions.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic mechanical behaviour of calendered nonwoven fabrics: Strain-rate dependency

Cucumazzo

Demirci

Pourdeyhimi

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

Calendered nonwovens, formed by polymeric fibres, are three-phase heterogeneous materials, comprising a fibrous matrix, bond-areas and interface regions. As a result, two main factors of anisotropy can be identified. The first one is ascribable to a random fibrous microstructure, with the second one related to orientation of a bond pattern. This paper focuses on the first type of anisotropy in thin and thick nonwovens under uniaxial tensile loading. Individual and combined effects of anisotropy and strain rate were studied by conducting uniaxial tensile tests in various loading directions (0°, 30°, 45°, 60° and 90° with regard to the main fabric’s direction) and strain rate (0.01, 0.1 and 0.5 s−1). Fabrics exhibited an initial linear elastic response, followed by nonlinear strain hardening up to necking and final softening. The studied allowed assessment of the extent the effects of loading direction (anisotropy), planar density and strain rate on the mechanical response of the calendered fabrics. The evidence supported the conclusion that anisotropy is the most crucial factor, also delineating the balance between the fabric’s load-bearing capacity and extension level along various directions. The strain rate produced a marked effect on the fibre’s response, with increased stress at higher strain rate while this effect in the fabric was small. The results demonstrated the differences of the mechanical behaviour of fabrics from that of their constituent fibres.

show abstract

“…Composites refer to materials produced by combining two or more materials to complement the shortcomings of each material while taking advantage of the features of each material [1,2]. Composites have been applied in aerospace applications in the past; since then, they have also been applied in various other industries [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Compounding Conditions of Polyamide 6, Carbon Fiber, and Al2O3 on the Mechanical and Thermal Properties of the Composite Polymer

Kim

Jeon

2019

Materials

View full text Add to dashboard Cite

Among the composite manufacturing methods, injection molding has higher time efficiency and improved processability. The production of composites via injection molding requires a pre-process to mix and pelletize the matrix polymer and reinforcement material. Herein, we studied the effect of extrusion process conditions for making pellets on the mechanical and thermal properties provided by injection molding. Polyamide 6 (PA6) was used as the base, and composites were produced by blending carbon fibers and Al2O3 as the filler. To determine the optimum blending ratio, the mechanical properties, thermal conductivity, and melt flow index (MI) were measured at various blending ratios. With this optimum blending ratio, pellets were produced by changing the temperature and RPM conditions, which are major process variables during compounding. Samples were fabricated by applying the same injection conditions, and the mechanical strength, MI values, and thermal properties were measured. The mechanical strength increased slightly as the temperature and RPM increased, and the MI and thermal conductivity also increased. The results of this study can be used as a basis for specifying the conditions of the mixing and compounding process such that the desired mechanical and thermal properties are obtained.

show abstract

Investigation about the Effect of Manufacturing Parameters on the Mechanical Behaviour of Natural Fibre Nonwovens Reinforced Thermoplastic Composites

Cited by 10 publications

References 36 publications

Effect of non‐woven flax mat manufacturing parameters and consolidation pressure on properties of composites manufactured using vacuum‐assisted resin transfer molding

Effect of non‐woven flax mat manufacturing parameters and consolidation pressure on properties of composites manufactured using vacuum‐assisted resin transfer molding

Anisotropic mechanical behaviour of calendered nonwoven fabrics: Strain-rate dependency

Effect of the Compounding Conditions of Polyamide 6, Carbon Fiber, and Al2O3 on the Mechanical and Thermal Properties of the Composite Polymer

Contact Info

Product

Resources

About