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Fiber-Reinforced Plastic (FRP)

Reviewed by Raghvendra GopalCheckmark
Last updated: May 24, 2023

What Does Fiber-Reinforced Plastic (FRP) Mean?

Fiber-reinforced plastic (FRP) is a composite material that consists of a polymer matrix reinforced with fibers. The fibers can be made from a variety of materials, such as glass, carbon, aramid or basalt, and they provide the strength and stiffness to the composite material.

FRPs are known for their high strength-to-weight ratio, corrosion resistance and durability, and are used in a variety of applications, such as automotive, aerospace, construction and marine industries.


Corrosionpedia Explains Fiber-Reinforced Plastic (FRP)

FRP is made by combining the reinforcing fibers with a polymer matrix, which can be a thermoset or a thermoplastic material. The fibers are typically arranged in a specific orientation to provide the desired strength and stiffness to the composite material. The polymer matrix provides the necessary adhesion and protection to the fibers, as well as other properties such as thermal stability and chemical resistance.

The polymer matrix also plays the role of containing the fibers and distributing the forces among them. Glass fibre, for example, often comes in the form of woven cloth or fibre mats and is stronger than steel for its weight. When mixed with epoxy resin, the resultant glass fibre composite is light, stiff, and robust.

FRP's properties can be tailored to meet specific application requirements by varying the type of fiber, the fiber orientation and the type of polymer matrix used. For example, carbon fibers are commonly used in aerospace applications because of their high strength and stiffness, while glass fibers are commonly used in construction applications because of their low cost and good weather resistance.

The manufacturing process for FRP typically involves a few steps, including fiber pre-treatment, resin impregnation and curing. During the fiber pre-treatment step, the fibers are cleaned and coated with a sizing material to improve adhesion with the polymer matrix. In the resin impregnation step, the fibers are combined with the polymer matrix using various techniques such as hand lay-up, spray-up, or filament winding. Finally, the composite material is cured using heat or pressure to achieve the desired properties.

FRP has numerous advantages over traditional materials such as metals and wood. It is lightweight, strong, and durable, making it ideal for applications where weight reduction and high strength are critical. It also has excellent resistance to corrosion, chemicals and UV radiation, making it suitable for use in harsh environments. Additionally, FRP can be molded into complex shapes, allowing for greater design flexibility and customization.

Industry applications of FRP are numerous and include automotive, aerospace, construction, and marine industries. For example, FRP is used in automotive applications to reduce weight and improve fuel efficiency, while in the aerospace industry, it is used in aircraft structures and components to improve performance and durability. Broadly, FRP is the best candidate for any design program which calls for weight savings, precision engineering, finite tolerances and production/operation simplicity.

Major properties of FRP composites include:

  • Very light.
  • High tensile strength.
  • Corrosion- and water-resistant.
  • Electrical conductivity resistance.
  • Chemical compound resistance.
  • High UV resistance.




Fiber Reinforced Polymer

Glass Fibre Reinforced Plastic

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