Statistical analysis of the mechanical properties of natural fibers and their composite materials. I. Natural fibers

The use of geopolymers as matrix in composites with syntactical fibers have been studied and proposed in the literature. Nonetheless, for the best know of the authors, there are no researches about the use of geopolymers as matrix in composites with natural fibers. The use of natural fibers is increasing in the automotive industries. One of the problems to expand the use of natural fibers in composite materials is the low fire resistance of the classical type of polymers. In this sense, geopolymeric matrices open up horizons for this type of application. This paper studies composites with geopolymeric matrices reinforced with two types of natural fibers: sisal (Agave Sisalana) and pineapple leaf fiber (PALF-Ananas Comosus). The mechanical properties of these new composites are investigated by mechanical tests. The results confirm the increasing in the mechanical performance whenever the fibers are under traction stress.

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Processing and Evaluation of Mechanical Properties of Coconut Coir and Rice Husk Reinforced Natural Hybrid Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.895.176 ◽

2019 ◽

Vol 895 ◽

pp. 176-180

Author(s):

C.K. Yogish ◽

S. Pradeep ◽

B. Kuldeep ◽

K.P. Ravikumar ◽

Rao R. Raghavendra

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Composite Materials ◽

Flexural Strength ◽

Rice Husk ◽

Hybrid Composites ◽

Natural Fibers ◽

Coir Fiber ◽

Coconut Coir ◽

The Impact

Over the last decades composite materials, plastics and ceramics have been the dominant emerging materials. The volume and number of applications of composite materials have grown steadily, penetrating and conquering new markets relentlessly. So everybody is concentrating on new materials which will be strong enough, less weight, recyclable with reduced cost. Hence all the researchers are concentrated on the composite materials which have all the above properties. The present work is concentrated on coconut coir fiber and Rice husk reinforced polyester hybrid composites. The composites specimen was fabricated with various weight percentages of natural fibers namely coconut coir (20%, 15%, 10%, and 5%) and Rice husk (15%, 10%, and 5%) combined with CamElect 3321 resin using hand lay-up method. So to obtain new composite materials different proportions of coconut coir and Rice husk is added and the mechanical properties such as Tensile strength, Flexural Strength and Impact test were carried out for the samples cut from the fabricated composites specimen to the dimensions as per ASTM standard. With the increasing percentage of the reinforcements the performance of the material is improving. The tensile strength increases with the increase in coir reinforcement percentage and flexural strength increases with the increasing in percentage of the rice husk and the impact strength of the material gets boost with equal proportional percentage of coconut coir and rice husk reinforcement.

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Techniques for Modelling and Optimizing the Mechanical Properties of Natural Fiber Composites: A Review

Fibers ◽

10.3390/fib9010006 ◽

2021 ◽

Vol 9 (1) ◽

pp. 6

Author(s):

Timothy K. Mulenga ◽

Albert U. Ude ◽

Chinnasamy Vivekanandhan

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Natural Fiber ◽

Natural Fibers ◽

Fiber Composites ◽

Computational Techniques ◽

Natural Fiber Composites ◽

Synthetic Fibers ◽

Reinforced Composite ◽

And Performance

The study of natural fiber-based composites through the use of computational techniques for modelling and optimizing their properties has emerged as a fast-growing approach in recent years. Ecological concerns associated with synthetic fibers have made the utilisation of natural fibers as a reinforcing material in composites a popular approach. Computational techniques have become an important tool in the hands of many researchers to model and analyze the characteristics that influence the mechanical properties of natural fiber composites. This recent trend has led to the development of many advanced computational techniques and software for a profound understanding of the characteristics and performance behavior of composite materials reinforced with natural fibers. The large variations in the characteristics of natural fiber-based composites present a great challenge, which has led to the development of many computational techniques for composite materials analysis. This review seeks to infer, from conventional to contemporary sources, the computational techniques used in modelling, analyzing, and optimizing the mechanical characteristics of natural fiber reinforced composite materials.

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STUDY ON PREPARATION OF BAMBOO FIBER REINFORCED UNSATURATED POLYESTER RESIN "GREEN" COMPOSITES

Science and Technology Development Journal ◽

10.32508/stdj.v15i3.1842 ◽

2012 ◽

Vol 15 (3) ◽

pp. 5-14

Author(s):

Thanh Duy Tran ◽

Tai Tan Dang

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Unsaturated Polyester ◽

Low Cost ◽

Glass Fibers ◽

Natural Fibers ◽

Green Composite ◽

Polyester Resins ◽

Neat Polymer ◽

Synthetic Fibers

Composite materials are usually made with organic matrixes reinforced by synthetic fillers, such as carbon or glass fibers.... But the high cost and environmental awareness of the synthetic fibers has limited their application. Meanwhile, natural fibers have been very attractive because they have been low cost, low density, eco-friendly, available in high quantities, renewable, biodegradable and shown excellent mechanical properties. In this study, green composite materials were prepared by using unsaturated polyester resins and bamboo fibers. The fibers were previously modified by chemical treatment and inserted into matrix in the role of the reinforcement. Some factors effecting to properties of products showed more advantages than modifier content were studied meticulously. As a result, composite products showed more advantages than neat polymer. For example, it does not only improve significantly mechanical properties but also becomes cheaper and friendlier with environment.

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Mechanical Properties of a Composite of Gypsum Reinforced with Caroá Fiber and PVAc

Materials Science Forum ◽

10.4028/www.scientific.net/msf.958.57 ◽

2019 ◽

Vol 958 ◽

pp. 57-61

Author(s):

Edpo Ferreira Santos ◽

Aoliabe Pedro da Silva ◽

Nelson Cárdenas Olivier ◽

Alessandra Félix da Costa Pereira ◽

Alan Christie da Silva Dantas

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Mechanical Strength ◽

Low Cost ◽

Natural Fibers ◽

Building Industry ◽

New Materials ◽

Bending Tests ◽

Northeast Region ◽

Fiber Size

The Development of new materials for building industry is a necessary issue to promote sustainability. Gypsum is an important low cost material very abundant in the northeast region of Brazil. Its physical properties make it an interesting material to form composite materials. This work presents a study of gypsum reinforced with Caroá (neoglasiovia variegate) natural fibers, where different amounts of fibers (1, 2, and 3%) were added into gypsum matrix. Three different fiber sizes (5, 10, and 20mm) were used to evaluate the effect of fiber size on the properties. PVAc was added in order to enhance the interactions between matrix and fibers. Mechanical strength was characterized by compression and bending tests. The addition of 1% mass Caroá fibers leads to a slightly increase on the mechanical strength independently of fiber size.

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Review of Hybrid Fiber Based Composites with Nano Particles—Material Properties and Applications

Polymers ◽

10.3390/polym12092088 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2088 ◽

Cited By ~ 1

Author(s):

Ayyappa Atmakuri ◽

Arvydas Palevicius ◽

Andrius Vilkauskas ◽

Giedrius Janusas

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Material Properties ◽

Chemical Treatment ◽

Hybrid Composites ◽

Natural Fibers ◽

Nano Particles ◽

Synthetic Fibers ◽

Wide Range ◽

Natural And Synthetic

The present review article provides an overview of the properties of various natural and synthetic fibers for the fabrication of pure natural composites and the combination of both natural/synthetic fibers-based hybrid composites, bio-based resins, various fabrication techniques, chemical and mechanical properties of fibers, the effect of chemical treatment and the influence of nanoparticles on the composite materials. Natural fibers are becoming more popular and attractive to researchers, with satisfactory results, due to their availability, ease of fabrication, cost-effectiveness, biodegradable nature and being environmentally friendly. Hybrid composites made up of two different natural fibers under the same matrix material are more popular than a combination of natural and synthetic fibers. Recent studies relevant to natural fiber hybrid composites have stated that, due to their biodegradability and the strength of individual fibers causing an impact on mechanical properties, flame retardancy and moisture absorption, natural fibers need an additional treatment like chemical treatment for the fibers to overcome those drawbacks and to enhance their better properties. The result of chemical treatment on composite material properties such as thermal, mechanical and moisture properties was studied. Researchers found that the positive influence on overall strength by placing the filler materials (nanoparticles) in the composite materials. Hybrid composites are one of the fields in polymer science that are attracting consideration for various lightweight applications in a wide range of industries such as automobile, construction, shipping, aviation, sports equipment, electronics, hardware and biomedical sectors.

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Influence of spacing of natural fibers in the tensile mechanical properties of composite materials.

10.26678/abcm.cobef2017.cof2017-0390 ◽

2017 ◽

Author(s):

Fábio de Sousa ◽

Edwillson Oliveira Filho ◽

César Tadeu Nasser Medeiros Branco ◽

Luciano Monteiro Almeida ◽

Igor dos Santos Gomes ◽

...

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Natural Fibers

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Statistical analysis of the mechanical properties of composite materials

Composites Part B Engineering ◽

10.1016/s1359-8368(00)00027-5 ◽

2000 ◽

Vol 31 (5) ◽

pp. 375-381 ◽

Cited By ~ 57

Author(s):

E Barbero ◽

J Fernández-Sáez ◽

C Navarro

Keyword(s):

Mechanical Properties ◽

Statistical Analysis ◽

Composite Materials

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Aging of polymer composite materials under loading. (See Beginning in #10-2020)

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2020-0-11-2-12 ◽

2020 ◽

pp. 2-12

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Cyclic Loads ◽

Reinforced Plastics ◽

Water Exposure ◽

Laboratory Conditions ◽

Bending Loads ◽

Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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