“A Review On Hybrid Composites Used For Marine Propellers”

Parts and constructions performance in the marine environments are subjected to high stress a priori to the measures of wind and waves. This review involve about the hybrid composite fabrication from artificial fibers of polymer composite. Hybrid composite furnish combination of property such as tensile modulus, compressive and impact strength which cannot realized in composite materials. The materials used for marine propellers of a varying number of blades with the fixed and controllable pitch having different diameters and skew angles and type of propellers were reviewed. Structural simulation, erosion wear tests, cavitations, bend twist coupling analyses, CFD case studies, fluid simulation method reviewed in this paper. Glass fiber composites proved to be economical and its adaptable in economical point of view. Carbon fiber composite propellers have more advantages than others with little compromise. In current scenario hybrid composite have been established as highly efficient, structural materials, high performances and their use is rapidly increasing. The current paper outline the utilizing of hybrid composite material for marine propellers as their versatility in enhancing good results. CONTACT Abdul Raheem abdulraheem3030@gmail.com Department of Mechanical Engineering, Brindavan College of Engineering, Bangalore-560063,VTU, Karnataka, India. © 2021 The Author(s). Published by Enviro Research Publishers. This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC-BY). Doi: http://dx.doi.org/10.13005/msri/180101 Article History Received: 12 December 2020 Accepted: 27 January 2021


Introduction
Thermoset polymer Composites are important class of engineering materials used in modern day engineering applications. Advanced fast growing technology is composite technology in present scenario and replacing metal by its less weight.
Composite materials characteristics to attain a particular objective, which guide to superior performance compare to other regular alloy materials. Hybrid composites is choice. The propeller is the critical part of the ship. stability, durability and costs play is important role in the propeller selection.
Conventionally propellers are made with steels, aluminium ,cast iron and some alloys. Advanced Hybrid composites used for academic researchers, industry and also offers field an opportunity to create innovative ideas explore for new generation. From last few decades as the whole world used hybrid composite material because of their its strength, high stiffness, long life, and low cost. its focus on marine research and provides composite material of various ship parts such as hull, deck, drive shaft, mast and propeller. Research interest on alternative materials for the propeller is increasing day by day; new materials was introduced in research. The recent studies carried out on composite propeller as shown in figure 1 was evident in introducing new materials. 1 Though composite materials manufactured by many processes are available, many researchers had fabricated composites by vacuum bagging process, 2 VARTM process, 4 and hand layup process 9 and tested their effectiveness. Studies were extended on composite material to determine and optimize the operational characteristics, 5,6,7 Cavitation response, 3 natural frequencies, 9 Finite element methods. 12 we could take advantage of composite materials and characteristics to achieve a specific goal, which could lead to better performance than using alloy materials. The ambiguity that which composite is more suitable and again if it is preferable hybrid composite leads in withholding the load, propeller types, operating speed and torque requirements. Among numerous verities of propellers and composite material suggested by researchers globally were reviewed in this paper for emphasizing them for future applications.

Application Areas of Hybrid Composite Material In Beams
Hybrid composites are used in Construction beams, Hybrid beams consisting of consolidation of fiber reinforced polymer with steel and concrete. The hybrid composite beams are forceful, stiffness, lightweight and corrosion resistant. These beams are very effective, low cost than the orthodox structural members. Hybrid composite have more Safety and excellent strength than the standard and it gives a minimum maintenance of structure. Hybrid composite is much stronger than steel andconcrete.

Fig. 2: Hybrid Composite Structure
In Structural Hybrid composites are used in Construction structures, they use of least material resources, increase the life span of buildings, very low environmental impact and ensure the high quality of civil infrastructures. specified design requirements used in hybrid composites a more cost-effective than traditional. Hybrid composites provides much more facilities than traditional composites including strength, stiffness, bending ,improved impact resistance, improved fracture toughness, reduced weight and lowcost.

In Telecom
Hybrid composites are used in telecommunication industry, Hybrid composite cable used in everyday, its support for power transmission if telecom is on.
In orthodox quad cable is used for communication and signal purpose in railway, Now technology has developed to increase in application of communication for optical fiber cable and data transmission are connecter. This cable also helpful to power the remote equipment from the station generator. Railways provide lower cost of service to passengers. Hybrid cable design which reduces not only cost of installation but also total cost.

In Aerospace
Hybrid composite material which provides more strength to weight ratio than metals. Aircraft components made up of hybrid composite material. The design of aircraft parts to meet the various criteria of safety and power. It played an important role in weight reduction, they reinforcements such as carbon, glass fibers reinforced epoxy. Carbon fiber is most widely used in aerospace application. Fiber reinforced epoxy composite have been recycled of aircraft engine to intensify the achievement of the system. Hybrid composite material can make pilot cabin door and transport system. The application of glass fiber-epoxy composite ranging from printed circuit boards to shotgun barrels.

In Wind energy
The wind power is greater importance in the area of energy generation due to its ecologically safe, its resource saving. In current hybrid fibers such as glass, carbon are mainly used in turbine blade fabrication. Manufacturing of turbine blades an application hybrid compositesis suggested on the basis of epoxy matrix. Its gives high strength and high modulus compared to conventionalmethods.    11 Investigated acoustic response and performance characterization with PIV on glassepoxy and carbon-epoxy propeller. It was found that glass-epoxy propeller shows better acoustic performance than the carbon-epoxy and in the cost point of view. Pavan Kishore et al. 12 Performed modal analysis on 4 bladed.
R-glass, S-glass, UD carbon/epoxy composite. It has observed that from FEA simulation, the natural frequency of metallic propeller was 22% higher than composite propeller.

Conclusion
Hybrid composites used for academic researchers, industry and also offers field an opportunity to create innovative ideas explore for new generation.
The whole world used hybrid composite material because of their its strength, high stiffness, long life, and low cost. its focus on marine research and provides composite material of various marine propeller. Materials and type of propeller were different from researcher to researcher. Regarding number of blades, skew angles, and propeller series studied by researchers may be according to their local suitability and demand they have studied on different propellers. The material point of view ,many researchers used carbon or graphite base fiber composite propeller as it has proven. Even glass fiber polymer composites have exhibited winning performance in a few conditions; due to density difference between carbon and glass, carbon fiber is preferable. In the cost point of view carbon fiber is more expensive than the glass fiber. To balance cost with the performance of hybrid composite can be suitable for marine propeller. A couple of studies proved that hybrids were best. However extensive studies are to be carried in the area of application of hybrid composite materials for the marine propeller to enhance its efficiency, life, torque transmitting capability and cost efficiency. There is broad scope for the future study of the marine propeller with hybrid composites.