Developments in polyester composite materials – An in-depth review on natural fibres and nano fillers

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Acoustics Of Ducts And Mufflers With Application To Exhaust And Ventilation System Design

Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

임피던스관에 의한 흡음계수와 임피던스의 결정방법 고찰 (Determination of sound absorption coefficient and impedance in impedance tubes )

This study deals with the investigation of the mechanical and water absorption properties of jute fibre reinforced epoxy composites prepared by using hand layup method. The effects of fibre length ...

An experimental study on the effect of nano-clay addition on mechanical and water absorption behaviour of jute fibre reinforced epoxy composites:

Weight reduction of components is the main aim of different industrial sectors. This leads to
increasing application areas of fiber composites for primary structural components. Aiming this objective, a
new lightweight Fiber/Metal Laminate (FML) has been developed. Fiber metal laminate is one such material
which is being widely investigated for its performance compared to existing material.. The most commercially
available fiber metal laminates (FML’s) are ARALL (Aramid Reinforced Aluminium Laminate), based on
aramid fibers, GLARE (Glass Reinforced Aluminium Laminate), based on high strength glass fibers and
CARALL (Carbon Reinforced Aluminium Laminate), based on carbon fibers. The mechanical properties of
FML show advantages over the properties of both aluminium alloys and composite materials individual. This
paper reviews relevant literature which deals with different manufacturing techniques for FML’s with
excellent properties under tensile, flexure and impact conditions. It also reviewed recent modeling techniques
on FML’s. Modeling of tensile, flexure and impacts behavior on fiber metal laminates requires
understanding the bonding between the metal and composite layer. Further research is necessary in the
assessment of mechanical performance of complex structures in real world conditions.

/pdf/a-review-fiber-metal-laminates-fml-s-manufacturing-test-3066t7mema.pdf

A Review: Fiber Metal Laminates (FML’s) - Manufacturing, Test Methods and Numerical Modeling

A Study on the Mechanical Behaviors of Jute-polyester Composites

The efficacy of woven jute-polyester (JP) composite tubes as structural energy-absorbing countermeasures has been explored in the current study. In this connection, the behaviors of 3-ply and 4-ply JP composite tubes of square and double-hat shaped sections subjected to axial quasi-static and impact loads are considered, and compared with 4-ply glass-polyester (GP) tubes of similar geometric configurations. Initially, basic mechanical characterization of JP laminates is carried out using a Universal Testing Machine, which is followed up with axial quasi-static and drop-weight impact testing of JP tubes, along with similar tests carried out on GP tubes. A thorough comparison is made between the performances including failure patterns of JP and GP components under axial loading using metrics such as peak load, mean crush load, absorbed energy, and specific energy absorption (SEA). As many structural applications involve dynamic bending loads, a comparative study is carried out between double-hat JP and GP components subjected to transverse impact loading. Based on the competitive values of mean load and SEA yielded by jute-composite tubes in the present study for axial impact loading, and high mean load and moderate energy absorption till failure recorded by similar components under three-point impact bending, it can be concluded that JP tubes can be capable of supporting impact loads under both axial and bending modes.

An experimental study on performance of jute‐polyester composite tubes under axial and transverse impact loading

Summary Natural fibres are widely used in the area of composite material applications because of their low density, low cost and acceptable specific mechanical properties. However natural fibres have some disadvantages such as the poor water resistance due to hydrophilic cellulose fibres resulting in poor mechanical properties. Research is being done on reducing moisture absorption of natural fibre-based composites, by using advanced manufacturing techniques as well as by providing different coatings. The purpose of this work is to study the moisture absorption and mechanical properties of jute-epoxy composites. Jute fibres are treated with NaOH before manufacturing of composite laminate in order to improve adhesion with epoxy material. Further jute-epoxy composite specimens were coated with epoxy resin and acrylic paint. Composite specimens with and without coatings are subjected to absorption in solutions of different pH media, for 28 days (666 h). The effect of coatings on reduction in moisture absorption for jute-epoxy composite is presented in this current work.

Ashok Mache

Papers

A Review: Fiber Metal Laminates (FML’s) - Manufacturing, Test Methods and Numerical Modeling

A Study on the Mechanical Behaviors of Jute-polyester Composites

An experimental study on performance of jute‐polyester composite tubes under axial and transverse impact loading

An experimental study on moisture absorption for jute-epoxy composite with coatings exposed to different pH media☆

A Comparative Study on the Axial Impact Performance of Jute and Glass Fiber-Based Composite Tubes